摘要
通过TORC(耦合跨临界有机朗肯循环)和VCR(蒸汽压缩制冷循环),构建了一种由低温烟气驱动的冷电联产复合系统(T-O-V)。采用R22、R134a、R227ea和R290作为循环工质,在不同冷量需求工况下,该复合系统可以有效地将低温烟气余热转化为电能和冷量输出。对T-O-V系统的热力学性能分析表明:在一定热源条件下,随着膨胀机进口压力的升高,系统总制冷系数先增大后减小,存在极大值,反映复合系统经济性的单位净输出功对应的换热面积存在最小值;采用R22作为循环工质时系统单位净输出功对应的换热面积最小。
Through coupling a trans-critical organic Rankine cycle( TORC) with a steam compression refrigeration cycle,a cooling and power cogeneration composite system driven by low temperature flue gases was set up. With R22,R134 a,R227ea and R290 serving as the working medium in the cycles,under various operating conditions with different cooling energy demands,the above-mentioned composite system can effectively convert the low temperature flue gas waste heat to electric energy and cooling energy output. The analytic results of the thermodynamic performance of the cooling and power cogeneration composite system show that under the condition of a certain heat source,with a rise of the pressure at the inlet of the expander,the total refrigeration coefficient of the system will first increase and then decrease,existing an extremely big value and the heat exchange area corresponding to the unit net output power which reflecting the cost-effectiveness of the composite system existing an extremely small value.When R22 is used as the working medium for the cycles,the heat exchange corresponding to the unit net output power will be minimum.
出处
《热能动力工程》
CAS
CSCD
北大核心
2015年第5期684-688,818-819,共5页
Journal of Engineering for Thermal Energy and Power
基金
国家重点基础研究发展计划基金资助项目(2011CB710701)
关键词
跨临界有机朗肯循环
蒸气压缩制冷循环
烟气余热
复合系统
trans-critical organic Rankine cycle,steam compression refrigeration cycle,flue gas waste heat,composite system
