摘要
采用贝塞尔函数求解了U型埋地换热器在稳态和正弦波边界下的解析解,可计算给定全年动态负荷下埋地换热器内流体温度,并据此判断埋地换热器的设计能否满足建筑物的要求。给出了在不同因素影响下流体全年最高温度和最低温度与U型管单位长度设计取冷(热)量的关系曲线,可用于指导U型埋地换热器的设计。得到了建筑物全年累计耗热量和耗冷量、最大热负荷和冷负荷应满足的关系,可用于指导建筑物冷热源方案的搭配。
Ground source heat pump system has been developed quickly in recent years for its low operating costs and no contaminant. The design of geothermal heat exchangers and the annual heat balance problem is the most important and difficult problem in ground source heat pump system. Bessel function was used to establish heat transfer model of U shape buried pipe of geothermal heat exchangers under harmonic and steady boundary conditions. The annual fluid temperature in U shape pipe can be computed using the heat transfer model when annual heating or cooling load is known. The curves are computed showing how maximum and minimum fluid temperature varies with the unit length design load of U shape pipe. The curves can be used to design U shape pipe. The annual total heating and cooling energy, the peak heating and cooling load should meets some conditions to assure the ground source heat pump system run well. The conditions were studied and could be used to design the heating and cooling source in a building.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2008年第10期1218-1224,共7页
Acta Energiae Solaris Sinica
关键词
土壤源系统
U型埋地换热器
传热模型
全年热平衡
ground source heat pump system
U shape buried pipe of geothermal heat exchangers
heat transfer model
armual heat balance
