摘要
提出了全年累积冷热负荷比的概念,用以对地埋管换热器全年承担冷热负荷的不平衡性进行定量描述。地埋管换热器钻孔的设计长度不仅取决于其承担负荷的大小,还与供热或制冷工况下的"可用温差"直接有关,由此提出冷负荷占优或热负荷占优的概念。通过计算实例,模拟了4种典型负荷特性下地下岩土及循环液的长期温度变化,并分析了不同负荷特性下钻孔间距对地埋管换热器性能的影响。
Introduces the concept of accumulated load ratio to quantitatively describe the imbalance between heating and cooling loads of the ground heat exchanger （GHE）. Holds that the design length of boreholes in the GHE relies not only on the loads themselves but also on the available temperature differences in cooling and heating conditions respectively. Therefore presents the conception of cooling/heatingdominated applications. With some calculation examples, simulates four typical cases with different load characteristics to study the variations in temperatures of the ground and circulating fluids over a long period of operation, and to analyse the impact of the space between boreholes on GHE performances under different load characteristics.
出处
《暖通空调》
北大核心
2008年第8期73-77,共5页
Heating Ventilating & Air Conditioning
关键词
地源热泵
地埋管换热器
负荷特性
ground source heat pump, ground heat exchanger, load characteristic
