利用吸收式热泵机组提取浅层地热的复合型集中供热方式研究

RESEARCH OF COMPOSITE CENTRAL HEATING SYSTEM USING ABSORPTION HEAT PUMP TO EXTRACT SHALLOW GEOTHERMAL

提出一种利用集中供热系统提供的高温热水驱动吸收式热泵机组提取浅层地热的复合型集中供热方式。通过一次能源利用效率、经济性分析等角度比较可知,相对常规热电联产集中供热方式,该方式可在集中供热系统热源不扩容、系统能耗不增加的前提下大幅提高原供热系统的供热能力,降低供热成本;相对电驱动土壤源热泵供热方式,该方式采用一次热网提供的高温热水作为驱动热源做功,替代高品质的电做功,可大幅减少耗电量,更好地实现能源梯级利用。在满足相同供热量条件下,吸收式土壤源热泵机组供热方式具有一次能耗低、地下埋管换热面积小、冬季地下取热量小和利于冬夏土壤热平衡等优点。

The composite central heating mode using high temperature hot water provided by central heating system to drive absorption heat pump for extracting shallow geothermal was proposed. Through the comparison of the primary energy utilization efficiency and economical analysis etc. , the research results show that comparing with the conventional heat-power combination central heating mode, the heating capacity of the new central heating system can be greatly improved and the heating costs can be largely reduced without expanding the capacity of heat resource and increasing energy consumption of system. Also, compared with electric-driven ground source heat pump heating mode, the new central heating mode utilized high temperature hot water provided by primary heat supply network to replace the high grade electricity as the driven heating resource to work, which can decrease sharply the electricity consumption and realize graded use of energy. The heating mode with absorption ground source heat pump have many advantages for meeting same heat supply conditions, such as lower primary energy consumption, lower heat transfer area of underground pipe, smaller underground heat in winter season and better for winter and summer soil heat balance.