摘要
利用高温热泵回收工业余热具有巨大的节能潜力,为提升高温热泵的供水温度和适用工况范围,在理论循环分析的基础上,研制了R245fa大温跨喷气增焓超高温热泵机组。以193 m^(3)/h准二级双螺杆压缩式热泵为实验样机,对其动态工况制热性能变化规律及全工况适用性进行实验研究。结果表明:在蒸发进水65℃,冷凝出水120℃下,主阀最佳过热度为7℃,辅阀最佳过热度为6℃,系统能效比为1.96,制热量为110.2 kW;该系统在大温跨、高出水温度工况下,具有较好的热力学性能,且存在向更高温度区间运行的潜力。
Recovery of industrial residual heat by high temperature heat pump has tremendous energy-saving potential.In order to improve the water supply temperature and applicable operating range of high temperature heat pump,R245fa large temperature difference vapor injection heat pump unit was developed on the basis of theoretical cycle analysis.A 193 m^(3)/h quasi-two-stage twin-screw compression heat pump was taken as the experimental prototype.The variation of its heating performance under dynamic working conditions was experimentally explored and the applicability of the unit in the wide application range was verified.The results show that the optimum superheat of the main valve is 7℃,the optimum superheat of the auxiliary valve is 6℃,the energy efficiency ratio of the system is 1.96,the heat generation is 110.2 kW at 65℃of the evaporative inlet water and 120℃of the condensate outlet water.The system has good thermodynamic performance under the conditions of large temperature difference and high outlet hot water temperature,and has the potential to operate in a higher temperature range.
作者
贺龙彬
郭健翔
孙晋飞
闫超杰
HE Longbin;GUO Jianxiang;SUN Jinfei;YAN Chaojie(School of Environmental and Municipal Engineering;Shandong Provincial Key Laboratory of Waste Heat Utilization and Energy-saving Equipment,Qingdao University of Technology,Qingdao 266000,Shandong Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2023年第7期33-38,共6页
Chemical Engineering(China)
基金
国家重点研发计划项目(2020YFD1100302)
山东省自然科学基金资助项目(ZR2020ME169)。
关键词
高温热泵
R245FA
补气增焓
变工况
high temperature heat pump
R245fa
enhanced vapor injection
variable working conditions
