基于闪蒸循环的冷热电联供系统的热力学及[火用]分析  

Thermodynamics and exergy analysis of Combined Cooling Heating and Power system based on flash cycle

作　　者：卢丹凤 潘振[1] 商丽艳[2] 周莉[3] 姚秀清[3] 孙超 LU Danfeng;PAN Zhen;SHANG Liyan;ZHOU Li;YAO Xiuqing;SUN Chao(College of Petroleum Engineering,Liaoning Petrochemical University,Fushun 113001,Liaoning,China;School of Environmental&Safety Engineering,Liaoning Petrochemical University,Fushun 113001,Liaoning,China;School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,Liaoning,China;China Petroleum Pipeline Engineering Co.,Ltd.,Langfang 065000,Hebei,China)

机构地区：[1]辽宁石油化工大学石油天然气工程学院,辽宁抚顺113001 [2]辽宁石油化工大学环境与安全工程学院,辽宁抚顺113001 [3]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [4]中国石油管道局工程有限公司,河北廊坊065000

出　　处：《天然气化工—C1化学与化工》2022年第1期100-108,共9页Natural Gas Chemical Industry

基　　金：辽宁省博士科研启动基金计划项目(2019-BS-159);辽宁省教育厅科学研究经费项目(L2019024);辽宁省教育厅重点科研项目(L2020002)。

摘　　要：为对不同温度区间的低温余热及LNG冷能实现梯级利用并回收CO_(2),提出了一种基于闪蒸循环的冷热电联供系统。对该系统设备及循环模块的热力性能、[火用]经济与[火用]环境进行了分析。结果表明,闪蒸循环中蒸发压力为4.5 MPa、蒸发温度为115℃、一级膨胀压力为800 kPa、分离器进口干度值为0.2时,该联供系统性能最佳,其净输出功、热效率、[火用]效率、LNG冷[火用]效率和CO_(2)捕集量分别为488.27 kW、61.290%、68.050%、69.530%和853.78 kW。此外,换热器与有机朗肯循环模块具有进一步降低成本与环境影响的潜力。In order to realize cascade utilization of low temperature waste heat and LNG cold energy in different temperature ranges and CO_(2) recovery,a Combined Cooling Heating and Power(CCHP)system based on flash cycle was proposed.The thermodynamic performance,exergoeconomic and exergoenvironmental of the system equipments and cycle modules were analyzed.The results show that the performance of the system is the best when the flash cycle’s evaporation pressure is 4.5 MPa,evaporation temperature is 115℃,the first-stage expansion pressure is 800 kPa,and the inlet dryness value of the separator is 0.2.Its net output power,thermal efficiency,exergic efficiency,LNG cold exergy efficiency and CO_(2) capture are 488.27 kW,61.290%,68.050%,69.530% and 853.78 kW,respectively.In addition,the heat exchangers and the Organic Rankine Cycle modules in the system have potential to further reduce costs and environmental impact.

关 键 词：余热回收 LNG冷能利用 [火用]经济分析 [火用]环境分析 CO_(2)捕集 

分 类 号：TE09[石油与天然气工程]