发布日期：2018-04-09 作者：地源热泵 点击：
Is the ground source heat pump refrigeration and heat through the soil heat, to meet the needs of life, but different soil conditions are different, exactly what the soil suitable for installation of ground source heat pump, water source heat pump under what circumstances the use efficiency is relatively high?
Thermal characteristics include thermal conductivity, volumetric heat capacity, thermal diffusivity, etc.. The thermal conductivity of soil heat conduction ability of a thermal physical properties, the number of Kcal/m - H - C, heat storage capacity of volumetric heat capacity characterization of soil, and the change rate of thermal diffusion is the representation of the soil temperature field. The coefficient of thermal conductivity, volumetric heat capacity and diffusivity vary with the composition, structure, density and water content of soil, and vary with different regions and seasons. In the same area, the heat release of soil is 80 percent soil heat absorption.
Two. The temperature of the earth
The earth temperature situation is very important, because the temperature difference between the earth and the water cycle driven heat transfer, the average surface temperature, the temperature close to the annual land according to the measured soil temperature of 10m deep in the area close to the annual average temperature, and will not be influenced by the season.
Soil moisture content is an important factor affecting heat transfer capacity, but when water replaces air between soil particles, it reduces contact thermal resistance between particles and improves heat transfer capability. The soil moisture is greater than a certain value, the soil heat conduction system is constant, that is lower than the critical moisture content, the thermal conductivity decreases, cooling in summer, the heat exchanger heat exchanger heat transfer to the soil, the soil around the heated water were expelled.
Three. Groundwater flow
The seepage of groundwater has an obvious effect on the heat transfer of the ground. In fact, the geological structure of the earth is very complex. There are loose clay layers, sand layers, sedimentary rocks, air and water layers. Because of the tectonic movement of the earth, folds, tilts and fractures occur again.
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