新型农村地源热泵地埋管换热器的传热模拟.pdf

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安徽农业科学,Journal of Anhui Agri. Sci. 2008 ,36(13) :5571 - 5572 ,5615 责任编辑庆责任校对马君叶
新型农村地源热泵地埋管换热器的传热模拟
蒋绿林,付文彪,徐丽(江苏工业学院,江苏常州 213016)
摘要[目的]更好地模拟地源热泵地埋换热器的换热状况。[方法]介绍了 3 种地源热泵地埋管换热器的传热模型(线热源模型、圆柱
热源模型和 Eskilson 模型) ,以宁波市鄞州区冬天供热为例,选择适当的传热模型进行数据模拟,得出了地埋管周围土壤温度场分布。
[结果]地源热泵系统连续运行一段时间后,地埋管周围半径为0. 8 m 的范围内温度场会呈现强烈的变化,该区域以外的地方温度变化越
来越小,直至接近于土壤的原始温度;浅层地表土壤原始温度场分布与深度呈指数关系,当深度达到一定程度后,土壤基本上维持恒温
状态,比当地年平均气温高 1~2 ℃。[结论]该研究为新型农村地源热泵中央空调工程设计和运行提供了理论参考。
关键词地源热泵;地埋管换热器;传热模型;温度场
中图分类号 S210. 7 文献标识码 A 文章编号 0517 - 6611(2008) 13 - 05571 - 02
Heat Transfer Simulation of Underground Pipeline Heat Exchanger in New Rural Ground Source Heat Pump
JIANG Lv lin et al (Jiangsu Polytechnic University ,Changzhou , Jiangsu 213016)
Abstract [Objective] The research aimed to better stimulate the heat exchange status of underground tube heat exchange. [Method] Three kinds of heat
transfer models of underground pipeline heat exchanger in ground source heat pump (including line heat sources model , cylindrical heat sources model and
Eskilson model2) w2ere introduced. Taking winter heat supply in Qinzhou district of Ningbo city as an example , the appropriate heat transfer model was se
lected to make data stimulation and educe the temperature field distribution in the surrounding soil of underground pipeline. [ Result ] After the ground
source heat pum