Exergoeconomic analysis of an absorption refrigeration and natural gas-fueled diesel power generator cogeneration system

Ponce Arrieta, Felipe Raul and Sodre, Jose Ricardo and Mateus Herrera, Mario David and Barros Zarante, Paola Helena (2016) Exergoeconomic analysis of an absorption refrigeration and natural gas-fueled diesel power generator cogeneration system. Journal of Natural Gas Science and Engineering, 36. pp. 155-164. ISSN 1875-5100

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Abstract

This work presents a thermoeconomic analysis of a cogeneration system using the exhaust gas from a
natural gas-fueled diesel power generator as heat source for an ammonia-water absorption refrigeration system. The purpose of the analysis is to obtain both unit exergetic and exergoeconomic costs of the cogeneration system at different load conditions and replacement rates of diesel oil by natural gas. A thermodynamic model of the absorption chiller was developed using the Engineering Equation Solver (EES) software to simulate the exergetic and exergoeconomic cogeneration costs. The data entry for the
simulation model included available experimental data from a dual-fuel diesel power generator operating with replacement rates of diesel oil by natural gas of 25%, 50% and 75%, and varying engine load from 10 kW to 30 kW. Other required data was calculations using the GateCycle software, from the available experimental data. The results show that, in general, the cogeneration cold unit exergetic and exergoeconomic costs increases with increasing engine load and decreases with increasing replacement
rate of diesel oil by natural gas under the conditions investigated. Operating with 3/4 of the rated engine
power and replacing 50% of diesel oil by natural gas, the exergoeconomic cost of the produced power is increased by 75%, and the exergoeconomic cost of the produced cold is decreased by 17%. The electric power unit exergetic and exergoeconomic costs indicate that the replacement of diesel oil by natural gas is feasible in the present considerations for engine operation at medium and high loads.

Item Type: Article
Uncontrolled Keywords: Natural gas Cogeneration Absorption refrigeration Power generation Exergoeconomic analysis
Subjects: H800 Chemical, Process and Energy Engineering
Divisions: Faculty of Computing, Engineering and the Built Environment
Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment
Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment > Advanced Systems Engineering
UoA Collections > UoA15: General Engineering
Depositing User: $ Ian McDonald
Date Deposited: 04 Jan 2017 10:46
Last Modified: 21 Sep 2017 10:58
URI: http://www.open-access.bcu.ac.uk/id/eprint/3746

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