摘要
本文针对空气源跨临界CO_2热泵系统,采用效率分析法建立了压缩机的数学模型,采用结构分析法建立了膨胀阀的数学模型,采用分布参数法建立了气体冷却器、蒸发器和中间换热器的数学模型,并将其耦合为整个系统的数学模型,并通过实验验证了数学模型的计算结果。结果表明:机组输入功率的计算值与实测值的偏差小于4.4%;制热量的平均偏差为5.76%;最优排气压力的偏差小于0.1 MPa。综上所述,在确定的运行工况下,通过数学模拟计算某确定配置系统的性能参数是可行的。
Based on a theoretical analysis of an air-source transcritical C02heat pump system,a mathematical model for the compressor was eveloped using an efficiency analysis in this study.In addition,a mathematical model for the expansion valve was built using a structural analysis;and mathematical models for the gas-cooler,evaporator,and regenerator were developed using the distributed parameter method.Moreover,a mathematical model for the entire system was built by combining these models.The accuracy of the system model was verified by an experimental test,which showed that the deviation in the unit^input power between the calculated value and measured value was less than4.4%,the mean deviation in the heating capacity was5.76%,and the deviation in the optimal discharge pressure was less than0.1MPa.Thus,it was possible to calculate the system performance by employing the mathematical simulation method.
作者
赵宗彬
宋昱龙
包继虎
陆磊
李宏哲
郭扬
朱丰雷
Zhao Zongbin;Song Yulong;Bao Jihu;Lu Lei;Li Hongzhe;Guo Yang;Zhu Fenglei(Hefei General Machinery Research Institute, Hefei ,230031,China;School of Energy and Power Engineering,Xi'an Jiaotong University,Xi’an,710049,China)
出处
《制冷学报》
CAS
CSCD
北大核心
2018年第2期22-30,共9页
Journal of Refrigeration
基金
本文受合肥通用机械研究院青年科技基金(2013010644) 项目资助
关键词
CO2热泵系统
稳态数学模型
最优排气压力
不确定度
性能系数
C02 heat pump system
steady state mathematical model
optimal discharge pressure
uncertainty
coefficient of performance
