自然冷源土壤直接供冷空调系统土壤温变特性

Experimental study on ground temperature variation characteristics of a ground-sink direct cooling system

为减少建筑能耗,提出一个以土壤作为冷源直接供冷空调的新构想,并在哈尔滨地区建立相应的实验系统.根据该系统空调季的实际运行,着重对其重要参数之一的土壤温度在供冷前、供冷期间以及供冷结束后的变化特性进行实验研究,得到一些重要分析结论.另外,还获得了一些重要的系统性能参数,如季节供冷系数、单位埋深取冷率.实验结果表明,所提出的土壤直接供冷系统在一定的地域范围内具有很大的节能潜力.

In order to reduce the energy consumption of buildings, a novel conception of using ground as heat sink directly for the cooling of buildings is presented. And a corresponding experimental system was set up in Harbin area. According to the operation of the system over an air-conditioning season, the variation characteristics of the ground temperature, as one of its important parameters, were emphatically studied before, during and after the cooling. And some important analytical conclusions were achieved. Moreover, some important system performance parameters were obtained, such as the cooling seasonal performance factor and the cold extraction rate per unit depth of borehole. The experimental results show that the ground-sink direct cooling system presented has great potentiality in energy saving in some given regions.