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Exergoeconomic Analysis and Modelling of LM2500+G4 Engine for Marine Propulsion and Cogeneration Application

C. V. Raman College of Engg. Bhubaneswar-Aishi Sahu
GVP College of Engineering (Autonomous)-Mithilesh Kumar Sahu
  • Technical Paper
  • 2019-01-0903
Published 2019-04-02 by SAE International in United States

The current global energy scenario demands for fuel efficient and cost effective thermal systems of energy conversion. It leads to investigation of techniques which can minimize the energy wastage and maximize the utilization of energy. In this regard the present paper proposes a configuration (LM2500+G4 marine engine manufactured by M/S GE Aviation for cogeneration application) for marine propulsion and cogeneration. The exhaust gas temperature of LM2500+G4 marine engine is around 800 K hence heat of this exhaust stream can be utilized to produce process steam for further use. In this particular work the aforesaid configuration has been exergoeconomically analyzed to predict the total cost rate (investment cost rate + fuel cost rate) of the system. The “Average Cost Theory” has been approached for the exergoeconomic analysis. The exergoeconomic analysis is the combined study of thermodynamic concepts and economic principles. Methodology utilizes the exergy concept of thermodynamics for cost assignment which is why it is called as “Exergoeconomic Analysis”. The present work deals with the thermodynamic performance prediction of proposed engine configuration as well as it also reveal the cost related data of the same. The results obtained from exergoeconomic analysis show that by generating steam in heat recovery steam generator the exergetic efficiency of cycle has been improved by 40%. The result of analysis also shows that investment cost flow rate ( Z. ), cost rate of fuel ( C.f ), total cost flow rate ( C.T ) and exergetic efficiency (ε) is being 0.2822 $/s, 0.3490 $/s, 0.6313 $/s and 53.90 % respectively.

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Thermal Analysis of Aircraft Auxiliary Power Unit: Application of Chemical Looping Combustion

SAE International Journal of Advances and Current Practices in Mobility

National Institute of Technology-Prashant Kumar, MD AKRAM, Anand Shankar Singh, Sanjay S
  • Journal Article
  • 2019-01-1390
Published 2019-03-19 by SAE International in United States
An “APU” (Auxiliary Power Unit) is a small gas turbine engine to provide supplementary power to an aircraft and is located at the tails of larger jets. APU generators provide auxiliary electrical power for running aircraft systems on the ground. Applications include powering environmental systems for pre-cooling or preheating the cabin, and providing power for crew functions such as preflight, cabin cleanup, and galley (kitchen) operation and long-haul airliners must be started using pneumatic power of APU compressor. The Honeywell 131-9A gas turbine APU has 440 kW shaft power and 90 kW electric generator consuming 120 kg fuel/hour. Here the traditional combustor of the APU is proposed to be replaced by a chemical-looping-combustion (CLC) system. CLC system consist of two reactor one is oxidation reactor (air reactor) and the other is reduction reactor (fuel reactor).The system is fluidized bed system in which activated metal-oxide(MeO) participates and circulates between the reactors .The metal-oxide (MeO) provides oxygen for combustion in the fuel reactor. The reduced metal is then transferred to air reactor before being reintroduced to the…
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Energy, Exergy and Emission Performance Analysis of Air-Film Blade Cooled Turbo Prop Turbine for Heavy Duty Cargo Aircrafts

G. L Bajaj Institute of Technology & Management-Shivam Mishra
Gandhi Institute for Technology-Alok Kumar Mohapatra
Published 2019-03-19 by SAE International in United States
In the present scenario, when the non-conventional energy resources are still under development stage for their full potential as a source of energy for our fast growing population, gas turbines are one of the most promising power generation technologies. The gas turbine based power utilities are also gaining acceptance across globe, because of increase in extraction of natural gas. Further reduction in the price of natural gas would also result in the number of gas turbine units installed across globe and thus it is important to carry out the environmental analysis of gas turbine based utilities. The gas turbines are employed in power generation in industries, aircrafts and marine propulsion units. The present exercise carries out thermodynamic performance analysis i.e. energy, exergy and emission performance analysis of an air-craft gas turbine. The gas turbine blades of present cycle are assumed to be cooled by air-film blade cooling technique. The present paper carries out the thermodynamic analysis by varying cycle parameters i.e. cycle pressure ratio and turbine-rotor-inlet-temperature. The study further investigates the cycle based on second-law…
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Thermal Analysis of Aircraft Auxiliary Power Unit: Potential of Super-Critical CO2 Brayton Cycle

National Institute of Technology Jamshedpur-Anand Shankar Singh, Sanjay S
Vellore Institute of Technology-Tushar Choudhary
Published 2019-03-19 by SAE International in United States
An “APU” (Auxiliary Power Unit) is a small gas turbine engine to provide supplementary power to an aircraft and is located at the tails of larger jets. APU generators provide auxiliary electrical power for running aircraft systems on the ground. Applications include powering environmental systems for pre-cooling or preheating the cabin, and providing power for crew functions such as preflight, cabin cleanup, and galley (kitchen) operation and long-haul airliners must be started using pneumatic power of APU compressor. The Honeywell 131-9A gas turbine APU has 440 kW shaft power and 90 kW electric generator consuming 120 kg fuel/hour. Hybrid power systems based on fuel cells are promising technology for the forthcoming power generation market. A solid oxide fuel cell (SOFC) is the perfect candidate for utilizing waste heat recovery. This case deals with waste heat recovery from fuel cell exhaust using Brayton cycle as bottoming cycle for additional power production. Here in this paper the traditional combustor of the APU is proposed to be replaced by a hybrid system which integrates a solid oxide fuel…
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Thermodynamic Analysis of an Evaporative Inlet Air Cooled Combined Cycle for Marine Application

GIFT, Bhubaneswar-Alok Kumar Mohapatra
NIT Jamshedpur-Anupam Kumari
Published 2018-09-10 by SAE International in United States
The integration of inlet air cooling to gas turbine based power utilities is a well accepted practice as this modification to the utility delivers superior utility performance. However, application of inlet-air cooling to drive turbines and specifically to marine mobility sector is rare in literature. Marine vessels are generally propelled by diesel engines, however large marine vessels specifically cruise ships and high speed naval vessels may have requirements of higher speeds and on-board power requirements which can fulfilled by gas turbine driving the propellers while on-board power needs can be met by steam turbine power generated from gas turbine exhaust heat. Such gas-steam combined cycles have the potential to become popular for high capacity marine vessels. The choice of gas turbine based combined cycle power plant for marine vessels in comparison to diesel engine powered vessel is also superior due to lower emission from the former. Higher ambient temperatures are known to negatively affect gas turbine and hence also marine combined cycle performance. The present article discusses the prospects of using an evaporative inlet air…
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