Exergoeconomic analysis of an absorption refrigeration and natural gas-fueled diesel power generator cogeneration system
Exergoeconomic analysis of an absorption refrigeration and natural gas-fueled diesel power generator cogeneration system
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DOI：
10.1016/j.jngse.2016.10.022
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发表时间：
2016-11
影响因子：
--
通讯作者：
F. Arrieta;J. R. Sodré;Mario David Mateus Herrera;Paola Helena Barros Zaránte
中科院分区：
文献类型：
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作者：
F. Arrieta;J. R. Sodré;Mario David Mateus Herrera;Paola Helena Barros Zaránte
对以天然气为燃料的柴油发电机尾气为热源的氨-水吸收式制冷系统进行了热经济学分析。分析的目的是获得热电联产系统在不同负荷和天然气替代柴油率下的单位火用成本和火用经济成本。利用工程方程求解器（EES）软件建立了吸收式制冷机的热力学模型，对热电联产的（火用）和（火用）经济性进行了模拟。用于模拟模型的数据输入包括来自双燃料柴油发电机的可用实验数据，该双燃料柴油发电机以25%、50%和75%的柴油被天然气替代的比率操作，并且发动机负载从10 kW变化到30 kW。其他所需的数据是使用GateCycle软件根据可用的实验数据进行计算。结果表明，在所研究的工况下，热电联产冷机组的火用和火用经济性成本一般随发动机负荷的增加而增加，随天然气替代柴油率的增加而降低。以发动机额定功率的3/4运行，用天然气替代50%的柴油，所产生的动力的火用经济成本增加75%，所产生的冷量的火用经济成本降低17%。发电机组的火用和火用经济成本表明，在目前考虑的发动机中高负荷运行情况下，天然气替代柴油是可行的。
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.