摘要
针对光伏太阳能热泵/环形热管(PVSA-HP/LHP)复合热水系统建立数学模型,对该系统在热泵(HP)模式独立运行、环形热管-热泵(LHP-HP)复合模式运行下的性能进行对比模拟。基于压缩机耗能最少的原则,分析太阳辐照强度和环境温度的变化对LHP-HP模式下合理切换时刻的影响,并以此为基准计算系统在复合模式下全年各月份的运行状况。研究结果表明:在春、秋季典型晴天工况下,将150 L水从15℃加热到50℃的运行过程中,LHP-HP模式的平均热效率和电效率分别比HP模式低37.00%和6.88%,但节约40.60%的电能;随着太阳辐照强度的增强以及环境温度升高,LHP-HP模式下切换时刻的冷凝水温升高,压缩机所消耗的电能减少。在3~11月份晴天工况下,应尽量优先采用LHP-HP复合模式运行以节约电能;在冬季或太阳辐照较低时,则采用HP模式独立运行。
A numerical model for photovoltaic solar assisted heat pump/loop heat pipe(PV?SAHP/LHP)hybrid water heater system was established.The performances of independent heat pump mode(HP)and loop heat pipe-heat pump switching mode(LHP?HP)were simulated.Based on the least power consumption,the effects of various solar radiation and ambient temperature on optimal switch of LHP?HP mode were analyzed,and the all-year-round operation status was also calculated.The results show that when heating150L tank from15℃to50℃in typical spring and autumn sunny weather,the average thermal efficiency and electrical efficiency of LHP?HP mode are respectively37.00%and6.88%lower than that of independent HP mode,while using the LHP?HP mode saves up to40.60%power consumption.With the increase of solar radiation and ambient temperature,the optimal switching water temperature of LHP?HP increases and the compressor power consumption decreases.On sunny days from March to November,LHP?HP mode should be in priority-of-use mode to save electricity.HP mode should be used in winter or in low-solar radiation and ambient temperature conditions.
作者
张政
李舒宏
ZHANG Zheng;LI Shuhong(School of Energy and Environment, Southeast University, Nanjing 210096, China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2017年第12期3392-3399,共8页
Journal of Central South University:Science and Technology
基金
"十二五"国家科技支撑计划项目(2014BAJ01B05)
江苏省产学研前瞻性项目(BY2015070-14)~~
关键词
太阳能热泵
环形热管
切换模式
性能模拟
solar heat pump
loop heat pipe
switching mode
performance simulation
