First-network water large-temperature-difference heat supplying system and method

Abstract

A system and method for heating with a network of water with a large temperature difference, in which a self-driven heat pump is installed in parallel between a network of water supply pipeline upstream of the heating system and a network of water return pipeline, and a network of water downstream of the heating system Multiple heat exchange stations that supply heat to users are installed in parallel between the water supply pipeline and the first-network water return pipeline; a group of self-driven heat pumps upstream of the heating system correspond to multiple heat exchange stations downstream of the heating system. The invention effectively increases the temperature difference between water supply and return water in a network by means of a self-driven heat pump, greatly improves the heating capacity of the heating network system, saves energy and reduces consumption, and a group of equipment in the upstream of the invention can correspond to multiple heat exchanges in the downstream station, saving about 30% of the investment cost and reducing the engineering volume by 70%. At the same time, it also effectively solves the problem that the heat exchange station cannot be installed with a large temperature difference heat exchange unit due to space or other reasons, so that it is impossible to realize the low temperature return water of a network of water. Greatly reduce the investment cost of the pipeline network and the energy consumption of water transmission and distribution in a network.

Description

technical field [0001] The invention belongs to the technical field of heating engineering, and in particular relates to a system and method for heating in one network of water with a large temperature difference. Background technique [0002] With the continuous expansion of the urban area, the matching heating demand is also increasing. High-temperature hot water often needs to be transported over a long distance to reach the heat exchange station or the location of the heat user. There are problems such as high energy consumption in pipeline transportation and insufficient local heating. increasingly prominent. How to increase the heating capacity and reduce the energy consumption of hot water in the pipe network under the condition of the existing heating pipe network is an urgent problem to be solved. [0003] To deal with this problem, the method of installing heat exchange units with large temperature difference in heat exchange stations has been proposed, but the ap...

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Problems solved by technology

[0003] To deal with this problem, the method of installing large temperature difference heat exchanger units in heat exchange stations has been proposed, but the application of large temperature difference heat exchanger units has the following difficulties in the implementation: 1. Renovation of water systems in heat exchange stations, foundation construction and heat exchange The hoisting workload of the unit is large; 2. Some heat exchange stations have a small space or are located in the basement, so it is impossible to install a heat exchange unit with a large temperature difference

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