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土壤源热泵是以土壤为低位热源的热泵:土壤的能源密度为20到40w/m~2,一般为25w/m~2左右,与空气源热泵相比土壤源热泵有很多优点:1、全年的温度波动较小,随着土壤深度的增加,土壤温度变化相对较稳定,冬暖夏凉,其季节性能系数有着恒温热源热泵的特性,季节平均性能系数较高:2、地温对气温的变化有滞后效应,当气温较低时,空气源热泵制热能力下降,而土壤热源却能维持相对较高的温度,制热能力相对较强;夏季空调时,室外气温较高,而土壤的温度相对较低,在高峰负荷运行时仍有较高的循环性能系数;3、土壤具有蓄能作用,冬季从土壤中取出热量在夏季可通过热传导由地面补充:4、埋地盘管不需要除霜,没有融霜除霜损失。
The ground source heat pump is a heat pump with the soil as the low heat source: the energy density of the soil is about 20 to 40 w / m 2, generally about 25 w / m 2. Compared with the air source heat pump, the ground source heat pump has many advantages: The annual temperature fluctuation is relatively small. With the increase of soil depth, the soil temperature change is relatively stable, and the seasonal coefficient of performance has the characteristics of constant temperature heat source heat pump. The seasonal average coefficient of performance is higher: The change has a hysteresis effect. When the air temperature is low, the air-source heat pump heating capacity decreases, while the soil heat source can maintain a relatively high temperature, and the heating capacity is relatively strong. In summer air-conditioning, the outdoor air temperature is higher while the soil The temperature is relatively low, there is still a high cycle performance coefficient at peak load operation; 3, the soil has a storage effect, winter heat removed from the soil in the summer can be supplemented by heat conduction through the ground: 4, buried coil does not need Defrosting, defrost without defrosting loss.