Effect of soil type and moisture content on ground heat pump performance

被引：119
作者：
Leong, WH
Tarnawski, VR
Aittomäki, A
机构：
[1] Hatch Associates Ltd, Nonferrous Business Unit, Energy & Fluid Mech Grp, Mississauga, ON L5K 2R7, Canada
[2] St Marys Univ, Div Engn, Halifax, NS B3H 3C3, Canada
[3] Tampere Univ Technol, Inst Energy & Proc Engn, SF-33101 Tampere, Finland
来源：
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 1998年 / 21卷 / 08期
基金：
加拿大自然科学与工程研究理事会;
关键词：
thermal properties; ground heat pumps; heat exchangers;
D O I：
10.1016/S0140-7007(98)00041-3
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Three different soils (sand, silty loam and silty clay) with five different degrees of saturation (0, 12.5, 25, 50 and 100%) were used in computer simulations. The performance of a ground heat pump system was found to depend strongly on the moisture content and the soil type (mineralogical composition). Alteration of soil moisture content from complete dryness to 12.5% of saturation strongly influences the ground heat pump performance, and any decrease of soil moisture in this range has a devastating effect on the coefficient of performance (COP). Therefore, it is beneficial to keep the soil moisture value as high as possible above dry soil conditions. Soil moisture content above the quarter saturation state leads to a much better heat pump performance. It was found, however, that the effect of moisture content variation above 50% of saturation on ground heat pump performance is relatively insignificant. (C) 1998 Elsevier Science Ltd and IIR. All rights reserved.
引用
收藏
页码：595 / 606
页数：12
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