基于余热回收的燃气热泵系统高温制热特性  

Performance characteristics for heating of gas engine-driven heat pump system with waste heat recovery at high ambient temperature

作　　者：胡亚飞[1,2] 吕杰 韩涛[1,3] 宋文吉 冯自平 HU Yafei;LYU Jie;HAN Tao;SONG Wenji;FENG Ziping(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China;University of Chinese Academy of Sciences,Beijing 100049,China;ZKG Energy(Chongqing)Research Institute Co.,Ltd.,Chongqing 401331,China)

机构地区：[1]中国科学院广州能源研究所,广东广州510640 [2]中国科学院大学,北京100049 [3]中科广能能源研究院(重庆)有限公司,重庆401331

出　　处：《化工进展》2022年第7期3553-3563,共11页Chemical Industry and Engineering Progress

基　　金：中国科学院战略性先导科技专项(A类)(XDA21070305)。

摘　　要：燃气热泵(GHP)是一种先进的低碳节能清洁供暖技术。针对当前GHP技术研究中普遍使用的R134a冷媒制热环境温度下限偏高及活塞式压缩机能效偏低等局限,本文创新性地搭建了基于使用R410A冷媒涡旋式压缩机的高能效GHP实验平台,在实验台上进行了不同出水温度(t_(w,out))、发动机转速(N_(eng))、进水流量(G_(w))及是否余热回收下的高温制热特性研究,得到了制热量(Q_(h))、耗气功率(P_(gas))、压机功率(P_(comp))、一次能源利用率(PER)及性能系数(COP)的变化规律,并对关键性能参数进行了误差分析。结果表明,t_(w,out)由41℃增至50℃时,Q_(h)、PER和COP分别减小了3.12%、13.17%和18.92%,PER下降的幅度明显小于COP;N_(eng)从1200r/min增至1800r/min时,在50℃出水下Q_(h)、P_(gas)与P_(comp)分别增加了51.03%、43.98%和55.37%,PER因受到发动机有效热效率升高的影响而增加了4.90%;G_(w)从5.8m^(3)/h增至11.5m^(3)/h时,系统各性能参数随G_(w)变化不敏感;系统考虑余热回收后,Q_(h)、PER与COP均显著增加,在N_(eng)为1200r/min且41℃出水下分别增加了31.18%、36.06%与31.54%,系统余热回收量占总制热量和发动机总余热量的比例分别为17.48%~24.54%和44.16%~63.39%。由误差分析可得Q_(h)、P_(gas)和PER的误差分别为3.29%、1.00%和3.44%,表明了系统测试结果具有较高的准确度。Gas engine-driven heat pump(GHP)is an advanced low-carbon,energy-saving and clean heating technology.In view of the limitations of the current commonly used in GHP system technology research,such as the lower limit of the ambient temperature of R134a refrigerant for heating mode was high and the energy efficiency of the piston compressor was low,an energy-efficient GHP experimental platform was built innovatively based on the use of R410A refrigerant and scroll compressors.The heating performance characteristics of the GHP system with waste heat recovery device at high ambient temperature were investigated.The changing laws of heating capacity(Q_(h)),gas consumption power(P_(gas)),compressor power(P_(comp)),primary energy ratio(PER)and coefficient of performance(COP)were obtained under the conditions of different outlet water temperature(t_(w,out)),engine speed(N_(eng)),inlet water flow rate(G_(w))and whether the engine waste heat was recovered or not.The error analysis of the key performance parameters was carried out.The results illustrate that when t_(w,out)increases from 41℃to 50℃,Q_(h),PER and COP decrease by 3.12%,13.17%and 18.92%,respectively.The decline extent of PER is much smaller than that of COP.When N_(eng) increases from 1200r/min to 1800r/min,the increase of Q_(h),P_(gas)and P_(comp)are 51.03%,43.98%and 55.37%respectively at t_(w,out)of 50℃.Meanwhile,the increase of PER is 4.90%due to the influence of the increase of the effective thermal efficiency of engine.When G_(w) increases from 5.8m^(3)/h to 11.5m^(3)/h,the system performance parameters are not sensitive to the change of G_(w).When the system undergoes waste heat recovery,Q_(h),PER and COP are all significantly increased,and they increase by 31.18%,36.06%and 31.54%respectively when N_(eng) is 1200r/min and t_(w,out)is 41℃.The ratios of the recovered waste heat to the total heating capacity and total engine waste heat are 17.48%—24.54%and 44.16%~63.39%respectively.According to the error analysis,the errors of Q_(h),P_(gas)and PER ar

关 键 词：燃气热泵 制热性能 一次能源利用率 热回收 分布式能源 

分 类 号：TE09[石油与天然气工程] TK11[动力工程及工程热物理—热能工程]