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首页> 外文期刊>Clean air >THERMO-ECONOMIC ANALYSIS OF ORGANIC RANKINE CYCLE (ORC) WITH CO_2 CAPTURE SYSTEM FOR COAL-FIRED POWER PLANT WASTE HEAT RECOVERY
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THERMO-ECONOMIC ANALYSIS OF ORGANIC RANKINE CYCLE (ORC) WITH CO_2 CAPTURE SYSTEM FOR COAL-FIRED POWER PLANT WASTE HEAT RECOVERY

机译：CO_2捕集系统对燃煤电厂废热回收的有机RANK循环（ORC）的热经济分析

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The thermo-economic performance of a coal-fired power plant combined with CO _( 2 ) capture system is studied with different configurations of organic Rankine cycle (ORC) systems. The liquefied natural gas (LNG) cold energy is used to assist carbon capture, due to which the CO _( 2 ) compressor can be omitted. The effects of turbine inlet temperature, mass flow rate and different working fluids on the energy, exergy efficiency, and CO _( 2 ) capture quantity are investigated. The studied results show that the reductions of the turbine inlet temperature and mass flow rate have a beneficial effect on the thermodynamic performance of the system and CO _( 2 ) capture quantity of a coal-fired power plant. Although the addition of a regenerator to ORC can reduce the exergy loss of condensers, the power generation and exergy efficiency of simple cycle (S-ORC) are higher than that of recuperated cycle (Rec-ORC). Ethane/ethylene and isopentane/propane are the best working fluid combinations of dual-fluids cycle (DF-ORC) and cascade cycle (Cas-ORC), respectively. The process of DF-ORC and Cas-ORC are more complex, resulting in a greater capital cost of investment. However, the temperature matching performance between the heat and cold source of heat exchangers in the combined system is higher than a single cycle, so the capital cost of the heat exchanger is lower. The cycle with CO _( 2 ) capture system increases the capital cost, but the increased power generation is enough to reduce the unit power generation costs of power plants. It is noted that S-ORC system is the most profitable of the four kinds of ORC systems.
机译：采用有机朗肯循环（ORC）系统的不同配置，研究了燃煤电厂结合CO_（2）捕获系统的热经济性能。液化天然气（LNG）冷能用于辅助碳捕获，因此可以省去CO _（2）压缩机。研究了涡轮机入口温度，质量流量和不同工作流体对能量，火用效率和CO _（2）捕集量的影响。研究结果表明，降低涡轮机进口温度和质量流量对系统的热力学性能和燃煤电厂的CO _（2）捕集量都有有益的影响。尽管在ORC中添加再生器可以减少冷凝器的火用损失，但是简单循环（S-ORC）的发电和火用效率要高于回热式循环（Rec-ORC）。乙烷/乙烯和异戊烷/丙烷分别是双流体循环（DF-ORC）和级联循环（Cas-ORC）的最佳工作流体组合。 DF-ORC和Cas-ORC的过程更加复杂，从而导致更高的投资资本成本。然而，组合系统中的热交换器的热源和冷源之间的温度匹配性能高于单个循环，因此热交换器的投资成本较低。具有CO _（2）捕集系统的循环增加了资本成本，但是增加的发电量足以降低电厂的单位发电成本。注意，S-ORC系统是四种ORC系统中最赚钱的。

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