1. Analysis of Performance Evaluation of Spiral Artificial Roughness on Single
and Double Pass Solar Air Heater
Riya,Kashish Madan,Ashish Negi,Madhuranjan,Mayank gupta,Varun Pratap
Solar Energy Laboratory, Department of Mechanical Engineering, College of engineering Roorkee,Roorkee
INTRODUCTION OBJECTIVES AND RATIONAL PROPOSED WORK
The major objective of this work is to find out the ways to improve
effectiveness of SAH by integration of Artificial Roughness Solar Air
Heater By Using Perforated Multi V Ribs with Double Pass Parallel
Flow.
Solar air heater from the major component of solar energy
utilization system which absorbs the incoming solar radiations
, converting it into thermal energy at the absorbing surface , in
transferring the energy to a fluid flowing collector.
The efficiency of flat plate solar air heater has been found to
be low convective heat transfer coefficient between the
absorber plate and the flowing air which increases the
absorber plate temperature , leading to high heat losses to the
environment resulting in low thermal efficiency of such
collectors.
Artificial roughness in the form of repeated ribs the most
effective and economic way of improving the thermal
performance of solar air heater.
The objective is to come out with new shape and geometry to
enhance effectiveness of SAH and compare it with other existing
geometries and find out gaps and limitations of that shape.
Equations Used are DITTUS BOELTER and MODIFIED
BLASSIUS EQUATION.
Parameters Used are Reynolds Number , Nusselt number ,
Friction factor and we have to find out variation in between these
parameters with respect to other by plotting graphs.
The role of energy becomes increasingly important to fulfill
needs of modern societies and to sustain fast economic and
industrial growth worldwide. The rapid depletion of fossil
resources has necessitated an urgent search for alternative
sources of energy. Solar energy is available freely and an
indigenous source of energy provides a clean and pollution
free atmosphere.
KEY OBSERVATIONS
From the Literature review we conclude that the Multi V ribs
with gap gave highest enhancement in nusselt number ,
however there was a very high enhancement in friction factor
also.
All the research work is done on Single pass SAH so we
worked upon the Double pass SAH.
From Literature review we also conclude that by providing
turbulence ( Ribs ) the SAH is more efficient than Flat plate
SAH.
INTEGRATION OF ARTIFICIAL ROUGHNESS SOLAR AIR
HEATER BY USING PERFORATED MULTI V RIBS WITH
DOUBLE PASS PARALLEL FLOW.
The use of repeated ribs as roughness elements underside the
absorber is one of the convenient and most efficient method for
heat transfer augmentation. A lot of experimental as well as few
Computational Fluid Dynamics (CFD) explorations [4] are reported
so far to evaluate the influence of roughness elements on the
thermal and frictional performance of roughened SAH duct. Further,
attempts had been made to optimize the rib roughness parameters.
Figure 1 : Process flow chart
PAST WORK DONE
Collection of data related to solar air heater single
pass
Performed experiment on reference plate (
rectangular ) with multi V ribs.
Figure 2 : Multi V shaped
Ribs with roughness
ACKNOWLEDGEMENT
METHODOLOGY
Solar Energy Laboratory
College of Engineering Roorkee,Roorkee
Email Id-singhriya2498@gmail.com
H O D Dr Gunjan Aggarwal ,Associate Professor,
College of Engineering Roorkee
THEORY
![Analysis of Performance Evaluation of Spiral Artificial Roughness on Single
and Double Pass Solar Air Heater
Riya,Kashish Madan,Ashish Negi,Madhuranjan,Mayank gupta,Varun Pratap
Solar Energy Laboratory, Department of Mechanical Engineering, College of engineering Roorkee,Roorkee
INTRODUCTION OBJECTIVES AND RATIONAL PROPOSED WORK
The major objective of this work is to find out the ways to improve
effectiveness of SAH by integration of Artificial Roughness Solar Air
Heater By Using Perforated Multi V Ribs with Double Pass Parallel
Flow.
Solar air heater from the major component of solar energy
utilization system which absorbs the incoming solar radiations
, converting it into thermal energy at the absorbing surface , in
transferring the energy to a fluid flowing collector.
The efficiency of flat plate solar air heater has been found to
be low convective heat transfer coefficient between the
absorber plate and the flowing air which increases the
absorber plate temperature , leading to high heat losses to the
environment resulting in low thermal efficiency of such
collectors.
Artificial roughness in the form of repeated ribs the most
effective and economic way of improving the thermal
performance of solar air heater.
The objective is to come out with new shape and geometry to
enhance effectiveness of SAH and compare it with other existing
geometries and find out gaps and limitations of that shape.
Equations Used are DITTUS BOELTER and MODIFIED
BLASSIUS EQUATION.
Parameters Used are Reynolds Number , Nusselt number ,
Friction factor and we have to find out variation in between these
parameters with respect to other by plotting graphs.
The role of energy becomes increasingly important to fulfill
needs of modern societies and to sustain fast economic and
industrial growth worldwide. The rapid depletion of fossil
resources has necessitated an urgent search for alternative
sources of energy. Solar energy is available freely and an
indigenous source of energy provides a clean and pollution
free atmosphere.
KEY OBSERVATIONS
From the Literature review we conclude that the Multi V ribs
with gap gave highest enhancement in nusselt number ,
however there was a very high enhancement in friction factor
also.
All the research work is done on Single pass SAH so we
worked upon the Double pass SAH.
From Literature review we also conclude that by providing
turbulence ( Ribs ) the SAH is more efficient than Flat plate
SAH.
INTEGRATION OF ARTIFICIAL ROUGHNESS SOLAR AIR
HEATER BY USING PERFORATED MULTI V RIBS WITH
DOUBLE PASS PARALLEL FLOW.
The use of repeated ribs as roughness elements underside the
absorber is one of the convenient and most efficient method for
heat transfer augmentation. A lot of experimental as well as few
Computational Fluid Dynamics (CFD) explorations [4] are reported
so far to evaluate the influence of roughness elements on the
thermal and frictional performance of roughened SAH duct. Further,
attempts had been made to optimize the rib roughness parameters.
Figure 1 : Process flow chart
PAST WORK DONE
Collection of data related to solar air heater single
pass
Performed experiment on reference plate (
rectangular ) with multi V ribs.
Figure 2 : Multi V shaped
Ribs with roughness
ACKNOWLEDGEMENT
METHODOLOGY
Solar Energy Laboratory
College of Engineering Roorkee,Roorkee
Email Id-singhriya2498@gmail.com
H O D Dr Gunjan Aggarwal ,Associate Professor,
College of Engineering Roorkee
THEORY](https://image.slidesharecdn.com/editedposter-180927134211/85/poster-1-320.jpg)
