摘要
针对普通R134a热泵制取中高温热水过程中存在的冷凝压力过高、系统效率低、不环保及无法直接替代等问题，提出一种新型中高温热泵混合工质R13I1／R290／R600a。建立基于该工质的热力循环模型，计算该循环的热力特性。结合气象数据，对其进行多工况计算并与已有的工质R134a、MIX1和MIX2对比分析。研究结果表明该新型混合工质的循环性能与同模型常温热泵工况下R134a的循环性质大致相同，且其环境性能优良：ODP为零，GWP小于20，温度滑移小于4℃。单位容积制热量略低于R134a，分别比MIX1和MIX2平均高16．7％、1．3％；COP分别比R134a、MIXI和MIX2平均高9．2％、4．1％和0．7％。综合循环性能较对比工质更优越，适用于冷凝温度为70～90℃，循环温升低于75℃的热泵工况。
Aiming at the problems of excessive condensing pressure, low system efficiency, non-environmental protection and unable to directly replace in process of the medium-high temperature hot water produced by the ordinary R134a heat pump, a new type of mixed working fluid R13I1/R290/R600a of medium and high temperature heat pump is proposed. The thermodynamics cycle model based on the working fluid is established and the thermodynamics characteristics of the cycle are calculated. Combined with meteorological data, it is calculated for multiple working conditions, and compared and analyzed with existing working fluids R134a, MIX1 and MIX2. The research results show that the cycle performance of the new mixed working fluid is almost the same as that of the R134a under the normal temperature heat pump condition of the same model. And its environmental performance is excellent, ODP is zero, GWP is less than 20, and temperature slip is less than 4℃. The heat produced by unit volume is slightly lower than R134a, but is 16.7% and 1.3% higher than MIX1 and MIX2, respectively; COP is 9.2%, 4.1%, and 0.7% higher than R134a, MIX1 and MIX2, respectively. The proposed mixture has better integrated cycle performance compared to the contrast working fluids, suitable for heat pump working condition with condensing temperature of 70-90℃ and circulating temperature rise of less than 75℃.
作者
向璨
常华伟
段晨
文科
舒水明
Xiang Can1, Chang Huawei1, Duan Chen2, Wen Ke1, Shu Shuiming1(1. School of Energy and Power Engineering, Haazhong University of Science and Technology, Wuhan 430074, China; 2. Wuhan Second Ship Design and Research Institute, Wuhan 430064, China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2018年第10期2760-2766,共7页
Acta Energiae Solaris Sinica
基金
“十二五”国家科技支撑计划(2014BAJ01B04-4)
