地源热泵和毛细管吊顶辐射采暖系统启动过程联合供热特性试验研究

Experimental Study on Heating Characteristic of the Ground Source Heat Pump Combined With Ceiling Radiant Heating System of Capillary Tube during Starting Process

采用试验的方法，分析了3VI90m井地埋管换热器换热性能、热泵机组供热性能、毛细管辐射板供热能力、辐射板加热层温度、地板表面温度以及室内温度的变化特性。经过研究，得出了上海松江区大学城区域的地质条件下，热泵机组供暖期间，最大单位井深换热量78W／m。地源热泵机组提供28～35℃的低温热水时的COP值与制取40～50℃热水相比大大提高，节能效果显著。室内采用毛细管吊顶辐射采暖时，当进水平均温度37．5℃时，最大换热量达到了3512W（171W／m^2），与进水平均温度29℃相比，其最大换热量增加了66．7％；另外，室内竖向空气存在明显温度梯度。

The specific experimental method was employed to study the ground heat exchanger performance of three wells of 60m depth, heating performance of heat hump unit and capillary tube mat and the characteristic of temperature change on the layer of capillary tube mat, the ceiling surface and indoor air. By search, some important conclusions were drawn that the largest heat transfer volume of per unit length of well was 78W/m in the geological condition of Shanghai Songjiang University City. Coefficient of performance COP of heat pump unit in heating mode was greatly improved when the average supply water temperature was 28 35℃ compared with 40 -50℃. So the effect of energy conservation was apparent. In addition, when ceiling radiant heating of capillary tube was adopted, there were obvious temperature grads in interior vertical direction. When the inlet water average temperature of the capillary tube was 37.5℃ ,the largest heat transfer volume of the capillary tube was 3512W（ 171W/m^2 ） and was increased 66.7% compared with that at the inlet water temperature of the capillary tube 29℃.