摘要
土壤源热泵在合理的运行模式下可以有效地利用土壤的冷热堆积。采用分段均摊恒定热流法研究了6种运行模式下,埋地管群换热器运行10 a内土壤的平均温度变化;提出了选取土壤源热泵合理运行模式的两个指标:换热效率和温升幅度,并用这两个指标分别选出热冷不平衡率下土壤源热泵合理的运行模式。当热不平衡率为0.10时,土壤源热泵应从冬季中期开始运行;当冷不平衡率为0.10时,应从夏季开始运行。
GSHP could take advantage of heat or cold accumulation of soil effectively in reasonable operating modes; Based on six kinds of operating modes, the section average constant heat flux method was used to study changes of average soil temperature in 10 years respectively; Two indexes, heat exchange efficiency and rising rate of temperature ,were proposed to judge reasonable operating modes. Furthermore, the two indexes were used to analyze these operating modes at different thermal imbalance ratios and the reasonable operating mode was obtained. The conclusions are that the GSHP should run in the middle of winter at the heat imbalance ratio of 0.10 and run at the beginning of summer at the cold imbalance ratio of 0.10.
出处
《可再生能源》
CAS
北大核心
2014年第11期1679-1686,共8页
Renewable Energy Resources
基金
国家自然科学基金项目(20071001-1)
关键词
运行模式
土壤平均温度
换热效率
温升幅度
数值分析
operating mode
average soil temperature
heat exchange efficiency
rising rate of temperature
numerical simulation
