System for concentrative warming through extracting temperature with large temperature difference via heat pump technology

Abstract

A system for concentrative warming through extracting temperature with large temperature difference via a heat pump technology comprises original heating equipment. Back water in a heating back waterpipeline of the original heating equipment works as a low-temperature heat source of a heat pump system; hot water can be supplied to a residence terminal system for heating after work of the low-temperature heat pump system; if a community heating system is further increased, back water in the heating back water pipeline of the upper-stage newly-added heating system works as a low-temperature heat pump; heating performance coefficient of the heat pump is increased, so temperature of the back water can be reduced to a lower degree when a present concentrative heat-supply pipe network is remained the same; a back water temperature difference of the whole concentrative heat-supply pipe network can be increased; and heat supplying capacity can be greatly improved when the present pipe networkis remained the same. Compared with a common pipe network re-arrangement way, the scheme requires low cost and short construction period, and is flexible to arranged; huge investment for pipe networkrearrangement can be solved; and problems of traffic jam and troubles to resident life during the construction can be solved.

Description

technical field [0001] The invention relates to the technical field of heating, in particular to a centralized heating system that uses heat pump technology to extract temperatures with large temperature differences. Background technique [0002] The heat supply in northern China is mainly based on coal, and many small and medium-sized cities have adopted the decentralized heat supply method of small and medium-sized boilers. These small heating stations have low heat supply and low efficiency, and most of them are not equipped with corresponding dust and sulfur removal equipment, resulting in serious air pollution. According to relevant national policies and regulations, the heating method of northern cities will be based on large-scale centralized heating, supplemented by the overall strategy of using various renewable energy sources. However, under the existing conditions, there are some bottlenecks restricting the expansion of central heating capacity. In recent years,...

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Problems solved by technology

In recent years, my country's urbanization has developed rapidly, and the building increment far exceeds the heating planning at that time. Therefore, the transmission capacity of most central heating heat pipe networks can no longer meet the needs of urban development, and the original heating stations cannot meet the needs of urban development. Heating demand of newly added community users

It is relatively easy to solve this problem by adding heating equipment to the heating station to increase the heating capacity, but it is very difficult to re-lay the heat pipe network. First, the investment in re-laying the pipe network is huge, and second, it needs to be planned jointly with other municipal layouts. At the same time, it will also bring many problems such as traffic congestion caused by the construction process, affecting the lives of residents, etc.

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