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The document discusses a master's thesis project that aims to increase the efficiency of passenger aircraft engines through the implementation of a combined-cycle engine (CCE) using supercritical carbon dioxide technology. The proposed concept involves a waste recovery unit that would recapture energy using a supercritical CO2 cycle. The thesis work will involve preliminary component design and optimization of the supercritical CO2 recovery unit through thermodynamic and engineering analysis. The final goal is to integrate and optimize the overall CCE design.
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![Combined-Cycle Engines
(CCE) for next generation
passenger aircraft
Background
The aerospace industry is exploring
novel concepts to highly increase
overall efficiency of civil aircraft
engines.
Proposed concept
Implementation of a waste recovery
unit based on supercritical CO2
technology.
Thermodynamics
• Preliminary component design
• Optimization of the ScCO2 recovery
unit
Engineering
• Weight assessment
• Investigation on novel aircraft
configurations
• CCE simulation along the entire
mission
Master Thesis: Federico Ghezze
Department: AWEP
Section: Flight Performance and Propulsion
Supervisor: L.Azzini, C.M. De Servi, A. Gangoli Rao,
Promoter: P. Colonna,
Starting date: 01/12/2014
Funding: TUDelft Aerospace faculty
Email: P.Colonna@tudelft.nl
Type: Engineering
AerospaceEngineering
Final goal
• Integrated optimization of the
CCE
Core
Nozzle
Duct
Nozzle
HPTLPC HPC LPTFAN
Fuel
Inlet
Combustion
chamber
CO2
System
TC
Electrica
l fan
MHERegenerato
r
Cooler
References
[1] Angelino, G. , Carbon dioxide condensation cycles for power
production, Journal of Engineering for Power, pages 287-295
, July 1968
Up to 15% fuel savings from the thermodynamic analysis
[2] Perullo, C. A. , Mavris, D. N. , Fonseca, E. , An integrated
assessment of an organic rankine cycle concept , Proceedings of
ASME Turbo Expo 2013, June 3-7, San Antonio, Texas, USA
Why Supercritical Carbon Dioxide?
MHECooler
A
A
Core
B
B
A-A
B-B High power density, more compact
components
Thermal stability at high
temperatures
High cycle efficiency
Environmental friendly
Required:
Innovative component design](https://image.slidesharecdn.com/252d2b9b-5ffe-4278-848b-77a50c4b2170-161210150839/85/poster_LAzzini_co2-1-320.jpg)
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The document discusses methods for improving the efficiency of gas turbine engines. It describes the basic components and mechanism of gas turbines, including an air compressor, combustion chamber, and turbine. The document then reviews several specific techniques for boosting power output and heat rate, such as increasing inlet air density through cooling or boosting pressure. These efficiency upgrade options include ceramic coatings, inlet air cooling methods like fogging or refrigeration, and supercharging. While some upgrades are more expensive than others, the best option depends on the turbine's age, location, and operating cycle.
Compressed air car_full_seminar_report
The document discusses compressed air technology (CAT) as a potential zero-emission vehicle technology. It provides details on how CAT vehicles work, including storing compressed air in carbon fiber tanks at 300 bars, releasing it to power an engine in multiple expansion stages for efficient energy use. CAT vehicles are compared to electric vehicles, showing CAT's lower costs, faster refueling time of under 4 minutes, and lower operating costs than gasoline vehicles. The document concludes that CAT is a feasible solution for reducing environmental pollution from fossil fuel vehicles as it produces no emissions.
Cooling of a truck cabin by vapour absorption refrigeration system using engi...
Cooling of a truck cabin by vapour absorption refrigeration system using engi...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and TechnologyEffect of Modified Design on Engine Fuel Efficiency
This document summarizes research on improving internal combustion engine fuel efficiency through techniques like reactivity controlled compression ignition (RCCI). RCCI is a variant of homogeneous charge compression ignition (HCCI) that provides more control over the combustion process and has the potential to significantly increase fuel efficiency and reduce emissions. The document reviews experiments on RCCI using light-duty and heavy-duty engines operated on various fuels, finding that RCCI can achieve near-zero NOx and soot emissions while improving efficiency. However, challenges to implementing RCCI at a wide range of loads and controlling combustion phasing and emissions remain areas of ongoing research.
Multi-objective Genetic Algorithm Applied to Conceptual Design of Single-stag...
"Multi-objective Genetic Algorithm Applied to Conceptual Design of Single-stage Rocket Using Hybrid Propulsion System" presented at The Eighth China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems (CJK-OSM).
Webinar: The cost effectiveness of natural gas combined cycle power plants wi...
Webinar: The cost effectiveness of natural gas combined cycle power plants wi...Global CCS Institute
This second webinar was held on Friday 25th April, for anyone who wasn't able to join us for the previous webinar held on Thursday 20th March.
This webinar presented the findings of a study to assess the economic viability of natural gas combined-cycle power plants with CO2 capture and storage (NGCC-CCS) in climate change mitigation strategies, emphasising the use of renewable energy and natural gas for electric power generation. In this study, the cost of NGCC-CCS was compared on a level playing field to those of intermittent renewable energy systems (IRES) and energy storage technologies as a means of reducing power sector greenhouse gas emissions. Specifically, the levelised cost of electricity (LCOE) of NGCC-CCS was compared to that of offshore wind, photovoltaic systems, and concentrated solar power (CSP) together with pumped hydro storage (PHS), compressed air energy storage (CAES), and Li-ion, ZEBRA and Zn-Br battery storage systems. The cost of NGCC-CCS as a backup technology in conjunction with IRES also was assessed.
At this webinar, Machteld van den Broek, senior researcher at the Utrecht University, presented the findings of the study. Her expertise is energy systems modelling and CCS. Among others, she is involved in the CATO-2 programme, the second Dutch national research programme on CCS. During the webinar Professor Edward Rubin from Carnegie Mellon University and co-author of this study, will assist during the Q&A session. Niels Berghout, from Utrecht University also contributed to this study. report
A wind tunnel test was conducted to compare the aerodynamic and propulsive performance of a slot distributed propulsion model resembling a "jet-wing" concept to a conventional circular nozzle arrangement. Testing found that the slot configuration resulted in an average 27% increase in drag and detrimental effects on lift compared to the nozzle. As a result of these initial performance penalties, the propulsive efficiency of the slot was 2.4% lower than the nozzle. However, the slot was able to partially fill the aircraft's wake and showed potential benefits, though not enough to overcome the initial drag penalty. The results suggest the jet-wing concept may be inferior to a simpler nozzle system but indicate wake-filling as an area for further study regarding possible
IRJET- Performance and Evaluation of Aqua Ammonia Air Conditioner System ...
This document discusses the performance evaluation of an aqua-ammonia air conditioning system for automobiles that uses waste exhaust heat from the vehicle engine. The study examines how the generator and absorption refrigeration system can utilize the available waste heat. Results found that the cooling capacity was affected by the ammonia concentration and provided acceptable cooling between 1-1.5 tons. The coefficient of performance was highest at higher generator and evaporator temperatures but decreased with increasing condenser and absorber temperatures. Overall, the study shows that an aqua-ammonia vapor absorption system has the potential to provide air conditioning for vehicles using only waste exhaust heat from the engine.
Webinar: The cost effectiveness of natural gas combined cycle power plants wi...
Webinar: The cost effectiveness of natural gas combined cycle power plants wi...Global CCS Institute
This webinar will presented the findings of a study to assess the economic viability of natural gas combined-cycle power plants with CO2 capture and storage (NGCC-CCS) in climate change mitigation strategies, emphasising the use of renewable energy and natural gas for electric power generation. In this study, the cost of NGCC-CCS was compared on a level playing field to those of intermittent renewable energy systems (IRES) and energy storage technologies as a means of reducing power sector greenhouse gas emissions. Specifically, the levelised cost of electricity (LCOE) of NGCC-CCS was compared to that of offshore wind, photovoltaic systems, and concentrated solar power (CSP) together with pumped hydro storage (PHS), compressed air energy storage (CAES), and Li-ion, ZEBRA and Zn-Br battery storage systems. The cost of NGCC-CCS as a backup technology in conjunction with IRES also was assessed.
At this webinar, Machteld van den Broek, senior researcher at the Utrecht University, presented the findings of the study. Her expertise is energy systems modelling and CCS. Among others, she is involved in the CATO-2 programme, the second Dutch national research programme on CCS. During the webinar Niels Berghout, junior researcher at the Utrecht University and co-author of this study, assisted during the Q&A session. Professor Edward Rubin from Carnegie Mellon University also contributed to this study.62001
This document discusses the development and application of organic Rankine cycle (ORC) technology for recovering waste heat from vehicle internal combustion engines (ICEs). It provides an overview of ORC technology and its potential to improve ICE efficiency and reduce emissions. The document also reviews representative ORC prototypes developed by vehicle manufacturers like BMW, Honda, and Cummins, which demonstrated efficiency improvements but noted barriers to commercialization like cost and complexity.
Analysis of recoverable exhaust energy from a light duty gasoline engine by u...
This document reviews methods of recovering exhaust energy from internal combustion engines using heat pipes. It discusses how heat pipes effectively transfer heat from exhaust gases to a condenser region, enhancing engine thermal performance. The document examines several studies on recovering exhaust waste heat using Rankine cycle systems and heat pipes. These studies found that waste heat recovery can increase engine fuel efficiency by 3-34% and power output by up to 20%, depending on the system and engine operating conditions. Recovering just 6% of exhaust heat energy could result in a 10% reduction in fuel consumption. The document concludes that heat pipe waste heat recovery systems show promising potential but require further research.
Harmonics Reduction in Stepper Motor Drive Using Fuzzy Logic Controller
Harmonics Reduction in Stepper Motor Drive Using Fuzzy Logic ControllerAssociation of Scientists, Developers and Faculties
Space vector modulation (SVM) technique for CSC is established by dividing ac-side line current cycle into six sectors. Each sector is divided into certain number of space vector (SV) cycles. SV cycle is divided into three states, two active and one zero state. SVM technique generates fifth and seventh harmonics (HD5-7) in the CSC ac-side current when operated with low switching frequencies, i.e., low number of SV cycles. Minimal reduction in HD5-7 was achieved by using certain states sequence inside SV cycle, and by calculating states ON times at once in the middle of each SV cycle. In this paper, fuzzy logic-dependent technique for calculating states ON times in SVM-CSC is proposed.Effect Of Compression Ratio On The Performance Of Diesel Engine At Different ...
Variable compression ratio (VCR) technology has long been recognized as a method for improving the
automobile engine performance, efficiency, fuel economy with reduced emission. The main feature of the VCR
engine is to operate at different compression ratio, by changing the combustion chamber volume, depending on
the vehicle performance needs .The need to improve the performance characteristics of the IC Engine has
necessitated the present research. Increasing the compression ratio to improve on the performance is an option.
The compression ratio is a factor that influences the performance characteristics of internal combustion engines.
This work is an experimental investigation of the influence of the compression ratio on the brake power, brake
thermal efficiency, brake mean effective pressure and specific fuel consumption of the Kirloskar variable
compression ratio duel fuel engine. Compression Ratios of 14, 15, 16 and 18 and engine loads of 3kg to 12 kg,
in increments of 3kg, were utilized for Diesel.
30120140501013
This document discusses optimizing the operation of binary cogenerative thermal power plants with solid oxide fuel cells (SOFC) that run on natural gas. It introduces SOFC technology and describes a model power plant that uses tubular SOFC modules from Siemens-Westinghouse to generate electricity. The power plant also includes a gas turbine and steam turbine to maximize energy efficiency. The document establishes a complex optimization function involving numerous variables that impact the plant's overall exergy efficiency. These variables relate to parameters of the SOFC, gas turbine, steam turbine and plant operation. The goal of optimization is to determine the optimum values for these variables to achieve maximum exergy efficiency from the integrated power plant system.
UCMerced_Benavente
This report summarizes the preliminary design of the EcoBobcat DEP19 aircraft, which uses distributed electric propulsion (DEP) with 14 propellers powered by turbo-electric generators. The design team selected epoxy sheet molding compound (carbon fiber) as the primary material. An estimated empty weight of 3,200 kg was calculated based on comparable aircraft. A novel "looped-back wing" concept is proposed, with the main wing looping back to attach near the tail, powered by superconducting motors. Performance analysis shows the aircraft meets all competition requirements with a range over 3,500 km, endurance over 8 hours, and a climb rate of 513 m/min. Structural analysis confirmed the wing can
Simulation of Suction & Compression Process with Delayed Entry Technique Usin...
The rapidly increasing worldwide demand for energy and the progressive depletion of fossil fuels has led to an
intensive research for alternative fuels which can be produced on a renewable basis. Hydrogen in the form of energy will almost
certainly be one of the most important energy components of the early next century. Hydrogen is a clean burning and easily
transportable fuel. Most of the pollution problems posed by fossil fuels at present would practically disappear with Hydrogen
since steam is the main product of its combustion. This Paper deals with the modeling of Suction and Compression Processes for
Hydrogen Fuelled S.I.Engine and also describes the safe and backfire free Delayed entry Technique. A four stroke,
Multicylinder, Naturally aspirated, Spark ignition engine, water cooled engine has been used to carrying out of investigations of
Suction Process. The Hydrogen is entered in the cylinder with the help of Delayed Entry Valve. This work discusses the insight
of suction process because during this process only air and Hydrogen enters in to cylinder, which after combustion provides
power. Simulation is the process of designing a model of a real system and conduction experiment with it, for the purpose of
understanding the behavior of the design. The advent of computers and the possibilities of performing numerical experiments
may provide new way of designing S.I.Engine. In fact stronger interaction between Engine Modelers, Designers and
Experimenters may results in improved engine design in the not-to-distant future. A computer Programme is developed for
analysis of suction and Compression processes. The parameter considered in computation includes engine speed, compression
ratio, ignition timing, fuel-air ratio and heat transfer. The results of computational exercise are discussed in the paper.
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Report on improved efficiency of gas turbine final
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Cooling of a truck cabin by vapour absorption refrigeration system using engi...
Cooling of a truck cabin by vapour absorption refrigeration system using engi...
Effect of Modified Design on Engine Fuel Efficiency
Effect of Modified Design on Engine Fuel Efficiency
Multi-objective Genetic Algorithm Applied to Conceptual Design of Single-stag...
Multi-objective Genetic Algorithm Applied to Conceptual Design of Single-stag...
Webinar: The cost effectiveness of natural gas combined cycle power plants wi...
Webinar: The cost effectiveness of natural gas combined cycle power plants wi...
IRJET- Performance and Evaluation of Aqua Ammonia Air Conditioner System ...
IRJET- Performance and Evaluation of Aqua Ammonia Air Conditioner System ...
Webinar: The cost effectiveness of natural gas combined cycle power plants wi...
Webinar: The cost effectiveness of natural gas combined cycle power plants wi...
Analysis of recoverable exhaust energy from a light duty gasoline engine by u...
Analysis of recoverable exhaust energy from a light duty gasoline engine by u...
Harmonics Reduction in Stepper Motor Drive Using Fuzzy Logic Controller
Harmonics Reduction in Stepper Motor Drive Using Fuzzy Logic Controller
Effect Of Compression Ratio On The Performance Of Diesel Engine At Different ...
Effect Of Compression Ratio On The Performance Of Diesel Engine At Different ...
Simulation of Suction & Compression Process with Delayed Entry Technique Usin...
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poster_LAzzini_co2
- 1. Combined-Cycle Engines (CCE) for next generation passenger aircraft Background The aerospace industry is exploring novel concepts to highly increase overall efficiency of civil aircraft engines. Proposed concept Implementation of a waste recovery unit based on supercritical CO2 technology. Thermodynamics • Preliminary component design • Optimization of the ScCO2 recovery unit Engineering • Weight assessment • Investigation on novel aircraft configurations • CCE simulation along the entire mission Master Thesis: Federico Ghezze Department: AWEP Section: Flight Performance and Propulsion Supervisor: L.Azzini, C.M. De Servi, A. Gangoli Rao, Promoter: P. Colonna, Starting date: 01/12/2014 Funding: TUDelft Aerospace faculty Email: P.Colonna@tudelft.nl Type: Engineering AerospaceEngineering Final goal • Integrated optimization of the CCE Core Nozzle Duct Nozzle HPTLPC HPC LPTFAN Fuel Inlet Combustion chamber CO2 System TC Electrica l fan MHERegenerato r Cooler References [1] Angelino, G. , Carbon dioxide condensation cycles for power production, Journal of Engineering for Power, pages 287-295 , July 1968 Up to 15% fuel savings from the thermodynamic analysis [2] Perullo, C. A. , Mavris, D. N. , Fonseca, E. , An integrated assessment of an organic rankine cycle concept , Proceedings of ASME Turbo Expo 2013, June 3-7, San Antonio, Texas, USA Why Supercritical Carbon Dioxide? MHECooler A A Core B B A-A B-B High power density, more compact components Thermal stability at high temperatures High cycle efficiency Environmental friendly Required: Innovative component design