摘要
本文以低温太阳能热驱动热泵采暖为研究背景,提出了一种单级氨水平衡式吸收-再吸式热泵循环。构建了循环的热力学模型并进行了验证,分析了循环高、低压发生压力,环境温度,热源温度等参数对循环供热性能系数(COP)的影响。研究结果表明,在给定的工况下,循环有确定的高、低压工作范围。在给定的高压发生压力下,为了获得最佳COP,需要对系统低压发生压力进行优化选择,最优的低压发生压力和最佳COP随高压发生压力的增大而增大。结果表明,循环的最大COP为1.51,对应优化的高、低压力为1.50 MPa/0.48 MPa,最低工作环境温度为-5.8℃,最低驱动热源温度为82℃。
This study proposes a novel single-stage ammonia-water absorption-resorption heat pump cycle aiming to utilize low-temperature solar thermal for space heating.A thermodynamic model was developed and validated to analyze the effects of parameters like high pressure(P_H),low pressure(P_L),ambient air temperature(T_a)and heat source temperature(T_h)on the cycle COP.The simulation results showed that under given working conditions,there exists a certain P_H range,and for each feasible P_H value within the range,there exists a corresponding P_L range to enable the cycle.For given P_H value,in order to obtain the optimum COP value,P_L value needs to be optimized,and the optimum P_L value and the corresponding optimum COP value both increase with the increasing of the P_H value.Under given working conditions,the maximum COP value reaches 1.51 and the corresponding P_H/P_L value is 1.50 MPa/0.48 MPa.The cycle can be operated when the ambient air temperature is above-5.8℃and the heat source temperature is over 82℃.
作者
贾腾
窦蓬勃
代彦军
JIA Teng;DOU Peng-Bo;DAI Yan-Jun(Institute of Refrigeration&Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2020年第4期797-802,共6页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51736006).
关键词
太阳能热
氨水
单级吸收-再吸收
热泵
性能分析
solar thermal
ammonia-water
single-stage absorption-resorption
heat pump
performance investigation
