This work presents the heat transfer characteristics of a self-aspirating porous radiant burner (SAPRB) that operates on the basis of an effective energy conversion method between flowing gas enthalpy and thermal radiation. The temperature field at various flame zones was measured experimentally by the help of both FLUKE IR camera and K-type thermocouples. The experimental setup consisted of a two layered domestic cooking burner, a flexible test stand attached with six K-type thermocouples at different positions, IR camera, LPG setup and a hot wire anemometer. The two layered SAPRB consisted of a combustion zone and a preheating zone. Combustion zone was formed with high porosity, highly radiating porous matrix, and the preheating zone consisted of low porosity matrix. Time dependent temperature history from thermocouples at various flame zones were acquired by using a data acquisition system and the temperature profiles were analyzed in the ZAILA application software environments.In the other hand the IR graphs were captured by FLUKE IR camera and the thermographs were analyzed in the SMARTView software environments. The experimental results revealed that the homogeneous porous media, in addition to its convective heat exchange with the gas, might absorb, emit, and scatter thermal radiation. The maximum heat transfer coefficient h, of the PRB was 40 w/m2k. The rate of heat transfer was more at the center of the burner where a combined effect of both convection & radiation might be realized.
EXPERIMENTAL INVESTIGATION ON THERMAL PERFORMANCE OF POROUS RADIANT BURNER AN...BIBHUTI BHUSAN SAMANTARAY
This paper presents the heat transfer characteristics of a
self-aspirating porous radiant burner (SAPRB) that operates
on the basis of an effective energy conversion method between
flowing gas enthalpy and thermal radiation. The temperature
field at various flame zones was measured experimentally by
the help of both FLUKE IR camera and K-type thermocouples.
The experimental setup consisted of a two layered domestic
cooking burner, a flexible test stand attached with six K-type
thermocouples at different positions, IR camera, LPG setup
and a hot wire anemometer. The two layered SAPRB consisted
of a combustion zone and a preheating zone. Combustion zone
was formed with high porosity, highly radiating porous
matrix, and the preheating zone consisted of low porosity
matrix. Time dependent temperature history from
thermocouples at various flame zones were acquired by using
a data acquisition system and the temperature profiles were
analyzed in the ZAILA application software environments. In
the other hand the IR graphs were captured by FLUKE IR
camera and the thermographs were analyzed in the
SMARTView software environments. The experimental results
revealed that the homogeneous porous media, in addition to
its convective heat exchange with the gas, might absorb, emit,
and scatter thermal radiation. The rate of heat transfer was
more at the center of the burner where a combined effect of
both convection & radiation might be realized. The maximum
thermal efficiency was found to be 64% which was having a
good agreement with the previous data in the open literature.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
CHARACTERIZATION AND EMISSION ANALYSIS OF PREMIXED AND PREHEATED POROUS RADIA...BIBHUTI BHUSAN SAMANTARAY
Experiments were conducted in porous radiant burners of different
configurations. Each of the burner used in the investigation was characterized
with array of pores, number of pores, pore diameter and porosity geometry. The
fuel used in the studies was Liquefied Petroleum Gas (LPG). The experimental
results are presented in-terms of the performance and emission from PRBs of
different configurations available in the market used for cooking. This work focuses
to characterize the performance and emission analysis of PRBs. The characterization
of each burner was carried out by the help of a horizontal floor type
profile projector (Metzer-M, Model: 806A). The temperature field at various
flame zones was measured by the help of both FLUKE IR camera (Model: Ti32)
and K-type thermocouples. Thermal efficiency of each of the burner was determined
by calculating the heat gained by the water and the container subjected for
heating and the amount of fuel consumed during the process. Parameters like
convective heat transfer coefficient (h), fuel density, firing rate and thermal efficiency,
were computed by using suitable empirical formulae. The maximum thermal
efficiency obtained was 64.59% and found good agreement with the previous
data in the open literature.
Simulation Studies Of Premixed N-Pentane/Air Liquid Micro CombustionIJERA Editor
With latest improvements in MEMS, combustion based Micro-Power generation devices are seen as alternatives for conventional batteries because of the high energy densities of Hydrogen and other hydrocarbon fuels. An important feature of micro-power system is to utilize the combustion of fuel or propellant in the micro-burner to produce the gas with high temperature and high pressure to drive turbines or other power units, which convert chemical into energy directly or indirectly other forms of energy, for example heat or power. We have concentrated on the usage of Micro combustion as a substitute for conventional batteries .In our study, a Micro Combustor of 1mm x 10mm is taken for Numerical Study. Combustion characteristics of N Pentane-Air mixture in a planar micro-channel is studied numerically. We have performed the liquid fuel combustion of n-Pentane and air to study the effects of liquid fuel combustion in a micro channel. The effect of axial velocity inlet, on exhaust gas temperature and Hydrogen Peroxide addition on exhaust gas concentration was analyzed respectively. We also investigated numerically the combustion characteristics under different conditions such as by varying the DPM, Number of Fuel Streams, and Spray Angle and so on. For this numerical analysis, an experimental model is considered as reference, and the geometry and the boundary conditions are taken from it for the purpose of simulation. In this study, n-Pentane is introduced as liquid droplets at the centerline and the liquid combustion is simulated numerically.
Optimizing Bunsen burner Performance Using CFD AnalysisIJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
EXPERIMENTAL INVESTIGATION ON THERMAL PERFORMANCE OF POROUS RADIANT BURNER AN...BIBHUTI BHUSAN SAMANTARAY
This paper presents the heat transfer characteristics of a
self-aspirating porous radiant burner (SAPRB) that operates
on the basis of an effective energy conversion method between
flowing gas enthalpy and thermal radiation. The temperature
field at various flame zones was measured experimentally by
the help of both FLUKE IR camera and K-type thermocouples.
The experimental setup consisted of a two layered domestic
cooking burner, a flexible test stand attached with six K-type
thermocouples at different positions, IR camera, LPG setup
and a hot wire anemometer. The two layered SAPRB consisted
of a combustion zone and a preheating zone. Combustion zone
was formed with high porosity, highly radiating porous
matrix, and the preheating zone consisted of low porosity
matrix. Time dependent temperature history from
thermocouples at various flame zones were acquired by using
a data acquisition system and the temperature profiles were
analyzed in the ZAILA application software environments. In
the other hand the IR graphs were captured by FLUKE IR
camera and the thermographs were analyzed in the
SMARTView software environments. The experimental results
revealed that the homogeneous porous media, in addition to
its convective heat exchange with the gas, might absorb, emit,
and scatter thermal radiation. The rate of heat transfer was
more at the center of the burner where a combined effect of
both convection & radiation might be realized. The maximum
thermal efficiency was found to be 64% which was having a
good agreement with the previous data in the open literature.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
CHARACTERIZATION AND EMISSION ANALYSIS OF PREMIXED AND PREHEATED POROUS RADIA...BIBHUTI BHUSAN SAMANTARAY
Experiments were conducted in porous radiant burners of different
configurations. Each of the burner used in the investigation was characterized
with array of pores, number of pores, pore diameter and porosity geometry. The
fuel used in the studies was Liquefied Petroleum Gas (LPG). The experimental
results are presented in-terms of the performance and emission from PRBs of
different configurations available in the market used for cooking. This work focuses
to characterize the performance and emission analysis of PRBs. The characterization
of each burner was carried out by the help of a horizontal floor type
profile projector (Metzer-M, Model: 806A). The temperature field at various
flame zones was measured by the help of both FLUKE IR camera (Model: Ti32)
and K-type thermocouples. Thermal efficiency of each of the burner was determined
by calculating the heat gained by the water and the container subjected for
heating and the amount of fuel consumed during the process. Parameters like
convective heat transfer coefficient (h), fuel density, firing rate and thermal efficiency,
were computed by using suitable empirical formulae. The maximum thermal
efficiency obtained was 64.59% and found good agreement with the previous
data in the open literature.
Simulation Studies Of Premixed N-Pentane/Air Liquid Micro CombustionIJERA Editor
With latest improvements in MEMS, combustion based Micro-Power generation devices are seen as alternatives for conventional batteries because of the high energy densities of Hydrogen and other hydrocarbon fuels. An important feature of micro-power system is to utilize the combustion of fuel or propellant in the micro-burner to produce the gas with high temperature and high pressure to drive turbines or other power units, which convert chemical into energy directly or indirectly other forms of energy, for example heat or power. We have concentrated on the usage of Micro combustion as a substitute for conventional batteries .In our study, a Micro Combustor of 1mm x 10mm is taken for Numerical Study. Combustion characteristics of N Pentane-Air mixture in a planar micro-channel is studied numerically. We have performed the liquid fuel combustion of n-Pentane and air to study the effects of liquid fuel combustion in a micro channel. The effect of axial velocity inlet, on exhaust gas temperature and Hydrogen Peroxide addition on exhaust gas concentration was analyzed respectively. We also investigated numerically the combustion characteristics under different conditions such as by varying the DPM, Number of Fuel Streams, and Spray Angle and so on. For this numerical analysis, an experimental model is considered as reference, and the geometry and the boundary conditions are taken from it for the purpose of simulation. In this study, n-Pentane is introduced as liquid droplets at the centerline and the liquid combustion is simulated numerically.
Optimizing Bunsen burner Performance Using CFD AnalysisIJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
Thermal Simulation of Biogas Plants Using Mat LabIJERA Editor
The major prerequisite for the optimum production of methane from a biogas plant is the sustenance of digester temperature within the narrow limits (300C-350C). It is experimentally investigated that, the MIT biogas plant is not maintaining optimum temperature, this decreases the efficiency and increases the detention time for charge. To maintain the plant in optimum temperature, it is necessary to find out the heat losses from the biogas plant and the external energy inputs need to operate the plant. Rate of gas yield, and the detention time (time necessary to anaerobically digest organic wastes) in a biogas reactor, are favorable functions of the temperature in the digester. A thermal simulation for MIT biogas plant has developed using matlab in order to understand the heat transfer from the slurry and the gas holder to the surrounding earth and air respectively. The computation has been performed when the slurry is maintained at 200C and 300C, optimum temperature of anaerobic fermentation. If the slurry is considered to be at 350C, the optimum temperature of anaerobic fermentation, the total heat loss from the plant is higher than the heat loss when the slurry is maintained at 200C. The heat calculations provide an appraisal for the heat which has to be supplied by external means to compensate for the net heat losses which occur if the slurry is to be maintained at 350C. A solar system with auxiliary electric heater is designed for maintaining the slurry at 350C.In conclusion; the results of thermal analysis are used to define a strategy for operating biogas plant at optimum temperatures.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
International Journal of Engineering Research and Development is an international premier peer reviewed open access engineering and technology journal promoting the discovery, innovation, advancement and dissemination of basic and transitional knowledge in engineering, technology and related disciplines.
Performance optimization assessment for a proper heat pump technology functio...Premier Publishers
This investigation represents a thermodynamic assessment of thermal performance optimization for a proper heat pump technology suitable for district hot water production at (60-65) °C. The clean energy sources integrated with environment friendly refrigerants were studied to optimize and validate the use of Cascade heat pump technology at various configurations. Three pure, R744, R600a and R134a, and one azeotropic mixture R410A refrigerants were circulated at different cycle arrangements. Two Cascade systems (Three Cycles), single Cascade system (Two Cycles), and compound Cascade system (Three Cycles) were proposed for the present assessment. The low temperature cycle operated at evaporator temperature of (-15 to -2) °C and the high temperature condenser was set at a temperature of (70) °C. The single Cascade heat pump circulating R410A/R134a and the two Cascade R410A/R717/R134a systems showed the best heating coefficient of performance (COP). The former refrigerant pair exhibited higher heating (COP) than that of the latter by (3.6-5) % calculated at (22.5) °C low temperature cycle intermediate temperature for the whole range of test conditions. The lowest (COP) was experienced by the two Cascade heat pump technology circulating R744/R717/R134a and R744/R717/R600a refrigerant pairs. The compound Cascade heat pump is definitely a promising option for low temperature heat source technology on the long term basis due to its low running cost for heating load generation. The heating (COP) showed a range of (2 to 2.7) at (70 %) compressor isentropic efficiency according to the system type, refrigerant pair and operating conditions considered in the present work. Any improvement for the compressor isentropic efficiency provides a valuable augmentation for the heating (COP) of the Cascade heat pump.
Exergetic efficiency analysis of hydrogen–air detonation in pulse detonation ...BBIT Kolkata
Exergy losses during the combustion process, heat transfer, and fuel utilization play a vital role in the analysis of the
exergetic efficiency of combustion process. Detonation is thermodynamically more efficient than deflagration mode of
combustion. Detonation combustion technology inside the pulse detonation engine using hydrogen as a fuel is energetic
propulsion system for next generation. In this study, the main objective of this work is to quantify the exergetic efficiency
of hydrogen–air combustion for deflagration and detonation combustion process. Further detonation parameters are
calculated using 0.25, 0.35, and 0.55 of H2 mass concentrations in the combustion process. The simulations have been
performed for converging the solution using commercial computational fluid dynamics package Ansys Fluent solver. The
details of combustion physics in chemical reacting flows of hydrogen–air mixture in two control volumes were simulated
using species transport model with eddy dissipation turbulence chemistry interaction. From these simulations it was
observed that exergy loss in the deflagration combustion process is higher in comparison to the detonation combustion
process. The major observation was that pilot fuel economy for the two combustion processes and augmentation of
exergetic efficiencies are better in the detonation combustion process. The maximum exergetic efficiency of 55.12%,
53.19%, and 23.43% from deflagration combustion process and from detonation combustion process, 67.55%, 57.49%,
and 24.89%, are obtained from aforesaid H2 mass fraction. It was also found that for lesser fuel mass fraction higher
exergetic efficiency was observed.
The understanding of gas geochemical model to reduce the exploration uncertaintyRizal Abiyudo
The various fumaroles areas in the prospect are can be modelled by boiling depletion model and the relation between each of fumaroles. Geothermal waters would boil to create a first set of fumaroles and then the boiled, gas-depleted water outflows to the site of a second set of fumaroles where it boils again, creating fumaroles with gas-depleted chemistry.
ER Publication,
IJETR, IJMCTR,
Journals,
International Journals,
High Impact Journals,
Monthly Journal,
Good quality Journals,
Research,
Research Papers,
Research Article,
Free Journals, Open access Journals,
erpublication.org,
Engineering Journal,
Science Journals,
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
Thermal Simulation of Biogas Plants Using Mat LabIJERA Editor
The major prerequisite for the optimum production of methane from a biogas plant is the sustenance of digester temperature within the narrow limits (300C-350C). It is experimentally investigated that, the MIT biogas plant is not maintaining optimum temperature, this decreases the efficiency and increases the detention time for charge. To maintain the plant in optimum temperature, it is necessary to find out the heat losses from the biogas plant and the external energy inputs need to operate the plant. Rate of gas yield, and the detention time (time necessary to anaerobically digest organic wastes) in a biogas reactor, are favorable functions of the temperature in the digester. A thermal simulation for MIT biogas plant has developed using matlab in order to understand the heat transfer from the slurry and the gas holder to the surrounding earth and air respectively. The computation has been performed when the slurry is maintained at 200C and 300C, optimum temperature of anaerobic fermentation. If the slurry is considered to be at 350C, the optimum temperature of anaerobic fermentation, the total heat loss from the plant is higher than the heat loss when the slurry is maintained at 200C. The heat calculations provide an appraisal for the heat which has to be supplied by external means to compensate for the net heat losses which occur if the slurry is to be maintained at 350C. A solar system with auxiliary electric heater is designed for maintaining the slurry at 350C.In conclusion; the results of thermal analysis are used to define a strategy for operating biogas plant at optimum temperatures.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
International Journal of Engineering Research and Development is an international premier peer reviewed open access engineering and technology journal promoting the discovery, innovation, advancement and dissemination of basic and transitional knowledge in engineering, technology and related disciplines.
Performance optimization assessment for a proper heat pump technology functio...Premier Publishers
This investigation represents a thermodynamic assessment of thermal performance optimization for a proper heat pump technology suitable for district hot water production at (60-65) °C. The clean energy sources integrated with environment friendly refrigerants were studied to optimize and validate the use of Cascade heat pump technology at various configurations. Three pure, R744, R600a and R134a, and one azeotropic mixture R410A refrigerants were circulated at different cycle arrangements. Two Cascade systems (Three Cycles), single Cascade system (Two Cycles), and compound Cascade system (Three Cycles) were proposed for the present assessment. The low temperature cycle operated at evaporator temperature of (-15 to -2) °C and the high temperature condenser was set at a temperature of (70) °C. The single Cascade heat pump circulating R410A/R134a and the two Cascade R410A/R717/R134a systems showed the best heating coefficient of performance (COP). The former refrigerant pair exhibited higher heating (COP) than that of the latter by (3.6-5) % calculated at (22.5) °C low temperature cycle intermediate temperature for the whole range of test conditions. The lowest (COP) was experienced by the two Cascade heat pump technology circulating R744/R717/R134a and R744/R717/R600a refrigerant pairs. The compound Cascade heat pump is definitely a promising option for low temperature heat source technology on the long term basis due to its low running cost for heating load generation. The heating (COP) showed a range of (2 to 2.7) at (70 %) compressor isentropic efficiency according to the system type, refrigerant pair and operating conditions considered in the present work. Any improvement for the compressor isentropic efficiency provides a valuable augmentation for the heating (COP) of the Cascade heat pump.
Exergetic efficiency analysis of hydrogen–air detonation in pulse detonation ...BBIT Kolkata
Exergy losses during the combustion process, heat transfer, and fuel utilization play a vital role in the analysis of the
exergetic efficiency of combustion process. Detonation is thermodynamically more efficient than deflagration mode of
combustion. Detonation combustion technology inside the pulse detonation engine using hydrogen as a fuel is energetic
propulsion system for next generation. In this study, the main objective of this work is to quantify the exergetic efficiency
of hydrogen–air combustion for deflagration and detonation combustion process. Further detonation parameters are
calculated using 0.25, 0.35, and 0.55 of H2 mass concentrations in the combustion process. The simulations have been
performed for converging the solution using commercial computational fluid dynamics package Ansys Fluent solver. The
details of combustion physics in chemical reacting flows of hydrogen–air mixture in two control volumes were simulated
using species transport model with eddy dissipation turbulence chemistry interaction. From these simulations it was
observed that exergy loss in the deflagration combustion process is higher in comparison to the detonation combustion
process. The major observation was that pilot fuel economy for the two combustion processes and augmentation of
exergetic efficiencies are better in the detonation combustion process. The maximum exergetic efficiency of 55.12%,
53.19%, and 23.43% from deflagration combustion process and from detonation combustion process, 67.55%, 57.49%,
and 24.89%, are obtained from aforesaid H2 mass fraction. It was also found that for lesser fuel mass fraction higher
exergetic efficiency was observed.
The understanding of gas geochemical model to reduce the exploration uncertaintyRizal Abiyudo
The various fumaroles areas in the prospect are can be modelled by boiling depletion model and the relation between each of fumaroles. Geothermal waters would boil to create a first set of fumaroles and then the boiled, gas-depleted water outflows to the site of a second set of fumaroles where it boils again, creating fumaroles with gas-depleted chemistry.
ER Publication,
IJETR, IJMCTR,
Journals,
International Journals,
High Impact Journals,
Monthly Journal,
Good quality Journals,
Research,
Research Papers,
Research Article,
Free Journals, Open access Journals,
erpublication.org,
Engineering Journal,
Science Journals,
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
Fischer-Tropsch fuels based on biomass and coal with carbon capture and storage could play a significant role in forming a low carbon transportation system. Coal and solar energy can power such a system allowing more of the carbon to be be integrated into the biofuels.
CAMISETA ESQUELETO CORRECTOR DE POSTURA, CON MICRO CÁPSULAS PARA CAMARERAS D...Lina Gómez
Trabajo desarrollado por las estudiantes María Camila Amaya Hernández y Angela Sepulveda, del programa Diseño de Moda de la Universidad Manuela Beltrán de Bucaramanga
Performance Improvement Of Self-Aspirating Porous Radiant Burner By Controlli...BIBHUTI BHUSAN SAMANTARAY
This paper presents the heat transfer characteristics of a self-aspirating porous radiant burner (SAPRB) that operates on the basis of an effective energy conversion method between flowing gas enthalpy and thermal radiation. The temperature field at various flame zones was measured experimentally by the help of both FLUKE IR camera and K-type thermocouples. The experimental setup consisted of a two layered domestic cooking burner, a flexible test stand attached with six K-type thermocouples at different positions, IR camera, LPG setup and a hot wire anemometer. The two layered SAPRB consisted of a combustion zone and a preheating zone. Time dependent temperature history from thermocouples at various flame zones were acquired by using a data acquisition system and the temperature profiles were analyzed in the ZAILA application software environments. In the other hand the IR graphs were captured by FLUKE IR camera and the thermographs were analyzed in the SMARTView software environments. The experimental results revealed that the homogeneous porous media, in addition to its convective heat exchange with the gas, might absorb, emit, and scatter thermal radiation. The rate of heat transfer was more at the center of the burner where a combined effect of both convection & radiation might be realized. The maximum thermal efficiency was found to be 64% which was having a good agreement with the previous data in the open literature.
an experiment on a co2 air conditioning system with copper heat exchangersINFOGAIN PUBLICATION
This paper presented an experiment on a CO2 air conditioning system with copper heat exchangers. In this study, the compressor and cooler were tested with hydraulic method to determine the deformed and torn temperatures. The results show that conventional compressor is not suitable for using high pressure, due to the COP of cycle is very low (0.5 only). With CO2 compressor, the cycle can be achieved COP of 3.07 at the evaporative temperature of 10C. This value equals with COP of commercial air conditioning system presently.
Ash Cooler Heat Recovery Under Energy Conservation SchemeIJAPEJOURNAL
A healthy fluidization state in circulating fluidized-bed combustion (CFBC) combustor is attributed to proper quantity of hot bed material (ash), which acts as a thermal fly-wheel. It receives & stores thermal energy from the burning of fuel (lignite) & distributes uniformly throughout the combustor & helps in maintaining a sustained combustion. The quantity of bed ash inside the combustor or size of the bed, depends upon boiler load & subsequently upon combustor temperature, lignite feed rate and ash % in lignite. As these parameters varies during process continuously, sometimes it becomes necessary to drain out the ash from the combustor. As & when differential pressure across the bed is increased from a justified level, draining of hot bed ash starts into Ash Coolers. Bed ash is drained at very high temperature of 850 oC & it also contains burning particles of lignite. This paper describes the heat recovery from bed ash, unloaded from the combustor into ash cooler, by pre-heating the condensate water of turbine cycle in a 125 MW CFB boiler of Surat Lignite Power Plant in India. The thermal performance of ash cooler was derived by doing a heat balance calculation based on the measured temperature of ash and cooling water with different load. From the heat balance calculation influence of ash temperature and ash amount on heat transfer coefficient is determined. Simulation is carried out around main turbine cycle indicates improved thermal economy of the unit, higher plant thermal efficiency, lower plant heat rate and reduce fuel consumption rate. Also simulation result shows that the heat transfer coefficient increase with ash amount and decreases with increase in ash temperature.
MODELLING FOR CROSS IGNITION TIME OF A TURBULENT COLD MIXTURE IN A MULTI BURN...ijcsa
The impact of Cross Ignition process (CI) in the gas turbine operation and environmental issue is still
investigated for extending the efficiency of gas turbine engines and meanwhile decreasing the environment
pollution.This paper presents various constructive influential parameters and analysis of their related
interaction during CI. A developed computational model for determination of cross-ignition time (CIT) is
proposed, based on previous relevant models for thermal analysis and for distinguishing of heat fluxes in
combustion processes.
Due to the first analysis of theoretical results, experimental investigation for various operating conditions
were essential to validate the developed computational model of the CIT. Thus, a simple experimental test
rig is designed for this purpose, and for validation of certain conditions of the computational model.
Meanwhile, for expanding the investigations in higher energy conversion and reducing expensive testprocedures,
that are conducted during critical test running, a new strategy is proposed for simulating the
thermal heat fluxes throughout the burners compartment model by implementation of Computational Fluid
Dynamic (CFD).
Finally, new constructive criteria based on the validated investigations will enable the future generation of
gas turbine combustors to operate in critical conditions.
NUMERICAL ENHANCEMENT OF HEAT TRANSFER OF FIN AND TUBE COMPACT HEAT EXCHANGER...anuragchoubey9
Heat exchangers are used in aero space engines have large heat transfer coefficient, large surface area per unit volume and low weight. The large surface area in compact heat exchangers is obtained by attaching closely spaced thin plate fins to the walls separating the two fluid. This study presents the airside performance of fin and tube compact heat exchangers with plain fin configuration. The effect of fin thickness, fin and tube material and fin spacing on the thermal-hydraulic characteristics is examined. Three-dimensional CFD simulations are carried out to investigate heat transfer and fluid flow characteristics of a plain fin and tube heat exchanger using the Commercial Computational Fluid Dynamics Code ANSYS fluent 16.0. Heat transfer and fluid flow characteristics with consideration of air property variability which is caused by the air temperature change of the heat exchanger are investigated for Reynolds numbers ranging from 2622 to 10498. Temperature drop and heat transfer rate is simulated using standard k-epsilon model with air flow is taken as steady and turbulent. Results are compared for two different material GH3044,S66280 and find out optimum heat transfer rate. After selecting best material GH3044 , we investigate the temperature variation and heat transfer characteristics of three different fin thickness 0.08 mm,0.1mm and 0.2 mm and three different fin spacing 0.8mm,1.1mm and 1.6 mm. domain having 0.8 mm fin spacing shows 5 % increase in heat transfer as compared to 1.1 mm fin spacing. Fin thickness 0.2 mm is better as compared to the other fin thickness and shows 8 % increment in heat transfer as compared to 0.1 mm fin thickness.
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
Experimental Investigation on Adsorption Capacity of a Variety of Activated C...IJERA Editor
This study aims to develop a device with minimum heat and mass transfer limitations between adsorbent and
adsorbate, and subsequently to obtain practically applicable adsorption capacity data. Also, 5 kW adsorption
chillers (evaporators, condensers and adsorbers) are designed based on the experimental output data of the whole
tested pairs. A finned-tube heat exchanger was employed and installed at the center adsorber, and each employed
adsorbent was immobilized on its surfaces by using an adhesive agent. A variety of pairs: are activated carbon
powder (ACP)/R-134a, ACP/R-407c, ACP/R-507A, activated carbon granules (ACG)/R-507A, ACG /R-407c
and ACG /R-134a, were examined at different adsorption temperatures of 25, 30, 35 and 50°C. It was found that,
at the adsorption temperature of 25°C the maximum adsorption capacity was 0.8352 kg kg-1 for ACP/R-134a,
while at the adsorption temperature of 50°C the maximum adsorption capacity was 0.3207 kg kg-1 for ACP/R-
134a. Therefore, the ACP/R-134a pair is highly recommended to be employed as adsorption refrigeration
working pair because of its higher maximum adsorption capacity higher than the other examined pairs.
Comparative Study of ECONOMISER Using the CFD Analysis IJMER
This paper presents a simulation of the economizer zone, which allowsstudying the flow
patterns developed in the fluid, while it flows along the length of the economizer. The past failure
details revelsthat erosion is more in U-bend areas of Economizer Unit because of increase in flue gas
velocity near these bends. But it isobserved that the velocity of flue gases surprisingly increases near
the lower bends as compared to upper ones. The model issolved using conventional CFD techniques by
FLUENT software. In which the individual tubes are treated as sub-gridfeatures. A geometrical model
is used to describe the multiplicity of heat-exchanging structures and the interconnectionsamong them.
The Computational Fluid Dynamics (CFD) approach is utilised for the creation of a three-dimensional
modelof the economizer coil of single column tube. With equilibrium assumption applied for
description of the system chemistry. The flue gastemperature, pressure and velocity field of fluid flow
within an economizer tube using the actual bounda
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Production & Evaluation of Biodiesel from Karanja Seeds, A Seed Plentily Avai...BIBHUTI BHUSAN SAMANTARAY
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Energy is a crucial input in the economic, social and industrial development of the country. Areas such as hilly regions, forest, tribal and islands which are in remote due to their varied geographic and demographic locations, generally have low load potential, low load factor and inaccessibility to national grid thereby making them unable to connect to the grid due to the involvement of heavy capital investment and therefore are also not expected to have power in the long run. In order to energize such areas the renewable energy sources have been found to be most reliable, economic, eco-friendly and quickly installable as compared to conventional energy sources. Fossil fuels have powered the tremendous industrial and economic development of the developed countries. The oil crisis of 1973 served the warning that fossil fuels were neither inexhaustible nor any cheaper. Renewable energy sources like Solar, Wind, Biomass, SHP, Tidal etc. are the main sources of renewable/green power which can be used to electrify such areas in most appropriate and economic way. Out of these sources, SPV is considered reliable, pollution free and convenient power generation system.
Effect of controlling parameters on heat transfer during spray impingement co...BIBHUTI BHUSAN SAMANTARAY
The heat transfer characteristics of air-water spray impingement cooling of stationary steel plate was experimentally investigated. Experiments were conducted on an electrically heated flat stationary steel plate of dimension 120 mm x 120 mm x 4 mm. The controlling parameters taken during the experiments were air-water pressures, water flow rate, nozzle tip to target distance and mass impingement density. The effects of the controlling parameters on the cooling rates were critically examined during spray impingement cooling. Air assisted DM water was used as the quenchant media in the work. The cooling rates were calculated from the time dependent temperature profiles were recorded by NI-cRIO DAS at the desired locations of the bottom surface of the plate embedded with K-type thermocouples. By using MS-EXCEL the effects of these cooling rate parameters were analysed The results obtained in the study confirmed the higher efficiency of the spray cooling system and the cooling strategy was found advantageous over the conventional cooling methods in the present steel industries.
Analysis of industrial flame characteristics and constancy study using image ...BIBHUTI BHUSAN SAMANTARAY
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HEAT TRANSFERCHARACTERISTICS OF A SELF ASPIRATING POROUS RADIANT BURNER FUELED WITH LPG
1. 1
HEAT TRANSFERCHARACTERISTICS OF A SELF ASPIRATING
POROUS RADIANT BURNER FUELED WITH LPG
Premananda Pradhan1*
, Purna C. Mishra2
,Bibhuti B. Samantaray3
,
1
Asst Professor, ITER, S'O'A University, Bhubaneswar-30, Odisha, India
2
Professor, KIIT University, Bhubaneswar-24, Odisha, India
3
M.tech Research Scholar, KIIT University, Bhubaneswar-24, Odisha, India
*E-mail- pradhanpremananda@gmail.com
Abstract
This work presents the heat transfer characteristics of a self-aspirating porous radiant burner (SAPRB) that
operates on the basis of an effective energy conversion method between flowing gas enthalpy and thermal
radiation. The temperature field at various flame zones was measured experimentally by the help of both
FLUKE IR camera and K-type thermocouples. The experimental setup consisted of a two layered domestic
cooking burner, a flexible test stand attached with six K-type thermocouples at different positions, IR camera,
LPG setup and a hot wire anemometer. The two layered SAPRB consisted of a combustion zone and a
preheating zone. Combustion zone was formed with high porosity, highly radiating porous matrix, and the
preheating zone consisted of low porosity matrix. Time dependent temperature history from thermocouples at
various flame zones were acquired by using a data acquisition system and the temperature profiles were
analyzed in the ZAILA application software environments.In the other hand the IR graphs were captured by
FLUKE IR camera and the thermographs were analyzed in the SMARTView software environments. The
experimental results revealed that the homogeneous porous media, in addition to its convective heat exchange
with the gas, might absorb, emit, and scatter thermal radiation. The maximum heat transfer coefficient h, of
the PRB was 40 w/m
2
k. The rate of heat transfer was more at the center of the burner where a combined effect
of both convection & radiation might be realized.
Keywords:Self-aspirating Porous Radiant Burner (SAPRB), LPG, Heat Transfer Coefficient (HTC), Transient
Temperature, IR Thermography, Thermocouples
1.0 Introduction
The heating systems used for domestic purposes
that operate on free flame, leads to relatively low
thermal efficiency. A lot of previous works are
available on the use of porous media in direction of
increasing thermal efficiency. Energy conversion
aspects between flowing gas enthalpy and thermal
radiation by using porous medium becomes an
interesting approach for improving the overall
performance of these systems. Proper parametric
control may lead to better enhancement of burner
performance.In India, LPG(liquefied petroleum
gas) is the most commonly used conventional fuel
[1].So as it is common in other Asian countries
also. As the economy of thecountry is getting better
day by day so as the standard of living of the
people. The population of the India is
approximately 1.25 billion so as the LPG market is
very huge. Govt. of India is spending huge amount
of money for subsidizing the domestic LPG
cylinder price[2]. As it is a burden on the
Government & ultimately on the people, different
ways should be invented to increase the thermal
efficiency of the conventional burners. N.K. Mishra
et al.[3] has tested Medium-Scale (5-10 kw) Porous
Radiant Burners for LPG Cooking Applications
with a good effect. He found the PRB with 5kw
thermal load yielded the maximum thermal
efficiency of about 50%, which is 25% higher than
the efficiency of the conventional burner also the
emission are much lower than the conventional
burner. V.K Pantangi et al.[4] has studied the
porous radiant burner for LPG cooking application.
In his study he found that the maximum thermal
efficiency of PRB is found to be 68% which is 3%
higher than the conventional burner with less CO &
NOX emission. P.Muthukumar & P.I Shyamkumar
[5] developed a novel porous radiant burner for
LPG cooking applications. They have tested PRB
2. Effect Of Heat Transfer On Performance Of Porous Radiant Burner Fuelled With LPG
2
having different porosity with different equivalence
ratio & wattages. The reported maximum thermal
efficiency is about 75% which is 10% higher than
the conventional burners. S.B Sathe et al. [6]has
studied both theoretically & experimentally the
thermal performance of the PRB. The results
indicate that stable combustion at elevated flame
speeds can be maintained in two different spatial
domains: one spanning the upstream half of the
porous region and the other in a narrow region near
the exit plane. The heat release and radiant output
are also found to increase as the flame is shifted
toward the middle of the porous layer.. [7] carried
out a study to investigate the lean flammability
limits of the burner and the unstable flash-
back/blow-out phenomena. Hayashi et al. [8]
presented a three-dimensional numerical study of a
two-layer porous burner for household applications.
They solved the mathematical model using CFD
techniques which accounted for radiative heat
transport in the solid, convective heat exchange
between solid and fluid. Talukdar et al. [9]
presented the heat transfer analysis of a 2-D
rectangular porous radiant burner. Combustion in
the porous medium was modelled as a spatially-
dependent heat generation zone. A 2-D rectangular
porous burner was investigated by Mishra et al.
[10]. Methane–air combustion with detailed
chemical kinetics was used to model the
combustion part. But in the above studies none has
particularly experimented the thermal performance
of the PRB using IR thermography. Here, in this
paper we attempted to find the characterization of
heat transfer of Porous radiant burner using IR
Thermography.
2.0 Experimental Set-up and Test procedure
A schematic of the experimental set-up used for
testing the performance of PRB is shown in Fig.1.
The fuel air flow rates are measured by the help of
hot air anemometer with suitable control valves.
The air and fuel mixtures are tested at different
velocities.Air–fuel mixture moves to the
burnerthrough a mixing tube made of Teflon. Three
k-type thermocouples are arranged horizontally and
other three k-type thermocouples are arranged
vertically for the measurement of the temperature
of different zones. Also the surface temperature&
flame temperature are measured by the help of IR
camera. All the thermocouple data are assessed by
data acquisition system(DAS). DAS is connected
with a computer for analysing the data in real
time.The PRB consideredfor the present work is
based on two-layered PMC. The twolayeredPRB
consists of a preheating zone and a combustion
zone.
Computer
HWA
Burner
IR Camera
Vertical Thermocouple Arrangement
Horizontal Thermocouple Arrangement
Fig-1: Schematic of Experimental Setup.
3.0 Experimental Procedure
The whole experimental procedure has been
conducted in a very controlled condition. The gas
velocity was measured by the hot wire
anemometer. It was positioned just at the exit of the
nozzle. The experimented was conducted in three
different velocities viz. 3.6 m/s, 3.0 m/s and 0.4
m/s. Then the temperature data are measured by the
thermocouple which has been arranged both in
vertically and horizontally on the top surface of the
burner. The temperature data are assessed by the
data acquisition system. Also the surface and flame
temperature are measured by IR camera. Then the
heat transfer co-efficient h, was calculated by the
following co-relation.
𝑵𝑵𝑵𝑵 = 𝟎𝟎. 𝟗𝟗𝟗𝟗𝐑𝐑𝐑𝐑𝟎𝟎.𝟑𝟑𝟑𝟑
µ
ρφ Vdf
=Re
whereNu = Local Nusselt Number
Re = Reynolds Number
h = Local Heat Transfer Coefficient, W/m2
K
ρ= Mass density of LPG, kg/m3
∅f= Porosity
v = Gas Velocity, m/s
d = Hydraulic Diameter, m
4.0 Results and Discussion
LPG
DAS
3. Proceedings of the 1st International Conference on Advances in Thermal and Energy Systems (AITES-2013)
Here in this experiment we have conduct the
experiment in three different velocities. So the
time-temperature graphs are as mentioned in the
figures from 2-7. Also the IR camera pictures are
attached from fig 8-9 by which indicates the
surface and flame temperature.
1. At gas velocity 3.6 m/s the rate of heat transfer is
more. As shown in the diagram thermocouple-3
shows temperature above 1200 ℃. Thermocouple
is positioned vertically 110mm away from the
surface of the burner. so it indicates high rate of
convection & radiation heat transfer in that zone
also the flame is totally turbulent. Similarly the
thermocouple-4 which is positioned horizontally
12mm from the centre of the circular burner,which
is having a radius of 38mm. It also indicates high
rate of heat transfer and the maximum temperature
Fig-2. Vertical Arrangement of Thermocouple at Gas Velocity 3.6 m/s
Fig-3. Horizontal Arrangement of Thermocouple at Gas Velocity 3.6 m/s
0
200
400
600
800
1000
1200
1400
0 100 200 300 400 500 600 700
Thermocouple-1
Thermocouple-2
Thermocouple-3
0
200
400
600
800
1000
1200
0 100 200 300 400 500 600 700 800
Thermocouple-4
Thermocouple-5
Thermocouple-6
4. Effect Of Heat Transfer On Performance Of Porous Radiant Burner Fuelled With LPG
4
Fig-4. Vertical Arrangement of Thermocouple at Gas Velocity 3.0 m/s
Fig-5. Horizontal Arrangement of Thermocouple at Gas Velocity 3.0 m/s
Fig-6. Vertical Arrangement of Thermocouple at Gas Velocity 0.4 m/s
0
200
400
600
800
1000
1200
0 200 400 600 800 1000
Thermocouple-1
Thermocouple-2
Thermocouple-3
0
100
200
300
400
500
600
700
800
900
1000
0 200 400 600 800 1000 1200
Thermocouple-4
Thermocouple-5
Thermocouple-6
0
50
100
150
200
250
300
350
0 100 200 300 400 500 600 700
Thermocouple-1
Thermocouple-2
Thermocouple-3
5. Proceedings of the 1st International Conference on Advances in Thermal and Energy Systems (AITES-2013)
Fig-7. Horizontal Arrangement of Thermocouple at Gas velocity 0.4 m/s
Fig-8. Temperature of the Burner surface Measured By IR Camera.
0
100
200
300
400
500
600
700
800
0 100 200 300 400 500 600 700
Thermocouple-4
Thermocouple-5
Thermocouple-6
6. Effect Of Heat Transfer On Performance Of Porous Radiant Burner Fuelled With LPG
6
Fig-9. Temperature of the Random Flame Measured by IR Camera.
attained is very close to 1000 ℃. So by calculating,
the h was found to be 38.598 w/m2
k.
2. At gas velocity 3.0 m/s the rate of heat transfer is
less as compared to the previous case. As shown in
the diagram thermocouple-3 shows temperature
around 1000 ℃. Thermocouple is positioned
vertically 65mm away from the surface of the
burner. Similarly the thermocouple-4 which is
positioned horizontally 12mm from the centre of
the circular burner,which is having a radius of
38mm attains a temperature around 950 ℃. So in
both the cases the thermocouple-3 and
thermocouple-4 indicates that the rate of heat
transfer is more at the center of the burner. The
heat transfer co-efficient is found to be 32.165
w/m2
k.
3. At gas velocity 0.4 the heat transfer
characteristics are found to be the same as the
previous two and the h is found to be 4.288 w/m2
k.
5.0 CONCLUSIONS
From the above experiment we conclude that the
performance of the PRB can be optimized if we can
control the parameters in a proper manner. The rate
of heat transfer was found to be very good in
different velocity range with maximum temperature
reaches at 1247 ℃. It still can go up to more if we
can have a advanced experimental setup. The
maximum heat transfer co-efficient was found to
be 38.59 w/m2k. So by controlling the
parameter & optimizing the process we can find
more amount of heat transfer in the PRB which
ultimately saves energy and can be very useful
for LPG cooking application.
REFERENCES
[1] D’SaAntonette, Narasimha Murthy KV. Report
on the use of LPG as a domestic cooking fuel
option in India. Int Energy Initiative,
http://www.iei-asia.org/ IEIBLR-LPG- Indiahomes
Report.pdf.2004.
[2] Mnril R. LPG in India subsidy with a purpose,
In: WLPGA – North Africa LPG summit 20th May
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[3] Mishra, N. K., Muthukumar, P., Mishra, S.C.,
2013.Performance Tests on Medium-Scale Porous
Radiant Burners for LPG Cooking Applications,
International Journal of Emerging Technology and
Advanced Engineering, Volume 3, Special Issue 3:
ICERTSD 2013, Feb 2013, pages 126-130, ISSN
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[4] Pantangi, V.K., Mishra, S.C., Muthukumar, P.
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7. Proceedings of the 1st International Conference on Advances in Thermal and Energy Systems (AITES-2013)
[5] Muthukumar, P., Shyamkumar, P.I. 2013, "
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[6] Sathe, S.B., Kulkarni, M.R., Peck R.E., and
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[7] Akbari, M. H., Riahi, P. and Roohi, R., 2009,
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[8] Hayashi, T.C., Malico, I. and Pereira, J.C.F. ,
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[9] Talukdar, P., Mishra, S.C., Trimis, D. and
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[10] Mishra, S.C., Steven, M., Nemoda, S.,
Talukdar, P., Trimis, D. and Durst, F., 2006, “Heat
transfer analysis of a two-dimensional rectangular
porous radiant burner”, Int. Communications in
Heat Mass Transfer, 33: 467-74.