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首页> 外文期刊>Energy Conversion & Management >Energy and exergy analysis of a new cogeneration system based on an organic Rankine cycle and absorption heat pump in the coal-fired power plant
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Energy and exergy analysis of a new cogeneration system based on an organic Rankine cycle and absorption heat pump in the coal-fired power plant

机译：基于有机朗肯循环和燃煤发电厂吸收热泵的新热电系统能源和漏洞分析

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摘要

A new cogeneration system based on ORC (organic Rankine cycle) and AHP (absorption heat pump) is presented to achieve the dual effects of improving power output and heating capacity in a coal-fired power plant. The heat source for heating is firstly led into the ORC to generate power, and then is led into the AHP as the driving heat source to recycle waste heat from exhausted steam of the ST (steam turbine) when the energy grade is reduced to a level that matches with the heating energy grade. On the basis of the thermodynamic first and second law, focusing on 135 MW coal-fired power plant, the energy and exergy analyses of traditional cogeneration system and new cogeneration system with ORC and AHP have been completed. Compared to the traditional cogeneration system, the power output and heating capacity are respectively increased by 1.47 MW and 32,106.64 kW when the flow rate of heating extraction steam is 40 kg/s. The integral thermal and exergy efficiencies are improved by 9.38% and 1.71%. Moreover, the coal consumption decrement for power generation and heat-supplying both augments with increasing heating extraction flow rate and decreasing load. The new presented scheme can not only reduce the irreversible loss of the cogeneration system but also save coal consumption.
机译：提出了一种基于ORC（有机朗肯循环）和AHP（吸收热泵）的新的热电联产系统，以实现提高燃煤发电厂中的功率输出和加热能力的双重影响。用于加热的热源首先被引入ORC以产生功率，然后当能量等级降低到水平时，将LED进入AHP，以回收ST（蒸汽涡轮机）的排气蒸汽的废热与加热能量等级相匹配。在热力学第一和第二律的基础上，重点关注135兆瓦燃煤发电厂，传统热电联产系统的能量和漏洞分析和具有兽人和AHP的新热电系统。与传统的热电联产系统相比，当加热萃取蒸汽的流速为40kg / s时，功率输出和加热容量分别增加1.47mW和32,106.64kW。整体热和漏洞效率得到9.38％和1.71％。此外，随着增加的加热萃取流速和降低负载，发电和供热的消耗减少和热量供应。新的呈现方案不仅可以减少热电联产系统的不可逆转损失，还可以减少煤炭消费。

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