摘要
针对公共场所现有电加热热水器能源利用效率过低的问题,从提高能源效率和一机两用的角度,提出了一种可产生冷热饮用水的补气增焓高温热泵热水器(HPWH)系统,即由准二级空气源压缩循环提供中温和高温热水,由单级空气源压缩制冷循环制取低温冷水,实现了高温热泵的能量梯级利用和饮用水的梯级产生。构建组成系统各部件的热力学模型,基于能量分析的方法,探讨了不同因素对系统性能的影响,并与传统电加热热水器进行了性能对比。研究结果表明:准二级压缩技术和能量梯级利用可显著改善高温热泵循环的制热性能。环境温度25℃、冷凝温度105℃、蒸发温度5℃时,HPWH系统制取开水的制热性能达到2.88,其能耗较传统电加热热水器降低至少219%,其制取冷水性能系数达到1.47。
Focusing on the low energy efficiency of the electric boiling water heater in public places at present,in view of the efficiency improvement of the energy utilization and one machine for two purposes,a novel high-temperature heat pump water heater(HPWH)system with enhanced vapor-injection for chilled/boiled drinking water production was proposed.For the HPWH system,the boiled water(high temperature and medium temperature)was produced by a quasi-two-stage compression heat pump system,whereas the chilled water was produced by the conventional single-stage air-source compression refrigeration system,so as to realize the cascade utilization of energy in high temperature heat pump and cascade production of drinking water.The thermodynamic model of the novel system was established,and the effect of different factors on the system performance were discussed in terms of energy analysis.The system performances between the proposed system and conventional electric drinking water boiler were compared.The results indicate that the quasi two-stage compression technology and energy cascade utilization can significantly improve the heating performance of high temperature heat pump system.The heating performance(COP)of HPWH system is up to 2.19,and its energy consumption is reduced by at least 119%compared with the conventional electric drinking water boiler.The cooling performance(PER)of HPWH system is 1.91 at the ambient temperature,condensation temperature and evaporation temperature with 25℃,105℃and 5℃,respectively.
作者
段丽平
宋钊
谈莹莹
王林
候召宁
安礼贝
DUAN Liping;SONG Zhao;TAN Yingying;WANG Lin;HOU Zhaoning;AN Libei(Civil Engineering School,Henan University of Science&Technology,Luoyang 471023,China)
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2022年第1期70-76,83,M0006,M0007,共10页
Journal of Henan University of Science And Technology:Natural Science
基金
国家自然科学基金项目(51806060,51806061)。
关键词
高温热泵
准两级压缩循环
冷热饮用水
电加热热水器
能量分析
high-temperature heat pump
quasi two-stage compression cycle
boiled/chilled drinking water
electric drinking water boiler
energy analysis
