Heat pump type large temperature difference heat exchange system and method

Abstract

The invention discloses a heat pump type large temperature difference heat exchange system and method. A generator, an absorber, a condenser and evaporators are arranged in a heat pump / refrigerator. The heat pump / refrigerator, water-water heat exchangers, a first-network-water water way and a second-network-water water way are combined and connected through valves and pipelines. The multiple evaporators are arranged. One or more water-water heat exchangers are arranged. When the multiple water-water heat exchangers are arranged, the water-water heat exchangers are connected in series, and the multiple evaporators are connected in series or independently and externally connected. When the multiple evaporators are connected in series, the multiple evaporators, primary parts of the water-water heat exchangers and the generator in the heat pump / refrigerator are connected in the first-network-water water way in series together. When the multiple evaporators are independently and externally connected, the multiple evaporators are connected in the first-network-water water way and the second-network-water water way in series correspondingly. The water supply and return temperature difference of first-network water is enlarged, the heating network conveying capability is improved, due to the low water return temperature of the first-network water, the problems about heat insulation, heat compensation and the like of a water return pipe network can be solved, and the pipe network investment cost and the transmission and distribution energy consumption of the first-network water can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of heating engineering, in particular to a heat pump type large temperature difference heat exchange system and method. 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. [0003] For the traditional heat exchanger system, there needs to be a certain heat transfer temperature difference between the first network water and the second network water to achieve effective heat exchange, which theoretically determines that the return water temperature of the first network water should be higher than the return water temperature of the second network water , thus ...

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Problems solved by technology

[0003] For the traditional heat exchanger system, there needs to be a certain heat transfer temperature difference between the first network water and the second network water to achieve effective heat exchange, which theoretically determines that the return water temperature of the first network water should be higher than the return water temperature of the second network water , thereby limiting the temperature difference between water supply and return water in a network

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