Exergy based parametric analysis of a combined reheat regenerative thermal power plant and water–LiBr vapor absorption refrigeration system
Exergy based parametric analysis of a combined reheat regenerative thermal power plant and water–LiBr vapor absorption refrigeration system
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DOI：
10.1016/j.enconman.2014.03.060
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发表时间：
2014-07
影响因子：
10.4
通讯作者：
T. Gogoi;K. Talukdar
中科院分区：
文献类型：
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作者：
T. Gogoi;K. Talukdar
本文对一种基于再热回热式蒸汽涡轮机（ST）的动力循环与水-溴化锂吸收式制冷系统（VARS）进行了（火用）分析。计算了功率循环的能量效率、系统的能量利用率和系统各部件的不可逆性。分析了燃料流量、锅炉压力、冷却能力和VARS元件温度对系统性能、元件和总系统不可逆性的影响。基于第二定律的结果表明，在150巴锅炉压力和VARS发生器、冷凝器、蒸发器和吸收器温度分别为80 °C、37.5 °C、15 °C和35 °C时，性能最佳。本火用的基础上的结果符合第一定律的结果在以前的分析中所做的相同的组合系统。不可逆性在各功率循环部件之间的分布表明，冷却塔中的不可逆性最高。排出的烟道气离开锅炉的不可逆性和锅炉是下一个主要因素。其中发生器的损失最大，其次是吸收器、冷凝器和蒸发器。
In this paper, exergy analysis of a combined reheat regenerative steam turbine (ST) based power cycle and water–LiBr vapor absorption refrigeration system (VARS) is presented. Exergetic efficiency of the power cycle and VARS, energy utilization factor (EUF) of the combined system (CS) and irreversibility in each system component are calculated. The effect of fuel flow rate, boiler pressure, cooling capacity and VARS components’ temperature on performance, component and total system irreversibility is analyzed. The second law based results indicate optimum performance at 150 bar boiler pressure and VARS generator, condenser, evaporator and absorber temperature of 80 °C, 37.5 °C, 15 °C and 35 °C respectively. The present exergy based results conform well to the first law based results obtained in a previous analysis done on the same combined system. Irreversibility distribution among various power cycle components shows the highest irreversibility in the cooling tower. Irreversibility of the exhaust flue gas leaving the boiler and the boiler are the next major contributors. Among the VARS components, exergy destruction in the generator is the highest followed by irreversibility contribution of the absorber, condenser and the evaporator.