Research on A New District Heating Method Combined with Hot Water Driven Ground Source Absorption Heat Pump

摘要

A new district heating method combined with hot water driven ground source absorption heat pump to extract shallow geothermal was put forward, and the district heating system provides hot water for the driven heat source of the absorption heat pump. By the primary energy efficiency and economical analysis method, research results show that compared with the conventional district heating system, the heating capacity of the new district heating system can be greatly improved and the heating costs can be largely reduced without expanding the capacity of district heating system and increasing other energy consumption. Also, compared with electric-driven ground source heat pump heating system, the new district heating system utilized high temperature water as the driven heating resource to replace the high grade electricity, which can improve significantly the energy utilization efficiency and decrease sharply the power consumption. Compared with electric-driven ground source heat pump heating system on the same heat quantity condition, the new district heating system has the advantage of lower first energy consumption and smaller size of underground heat exchanger and the smaller heat extraction during winter period which was conducive to achieve winter and summer heat balance.