A heat pump type large temperature difference heat exchange system and method

Abstract

A heat pump type large temperature difference heat exchange system and method. The heat pump / refrigerator is equipped with a generator, an absorber, a condenser and an evaporator, the heat pump / refrigerator, a water-water heat exchanger, a water network and a secondary network The water channel is combined and connected through valves and pipelines; there are multiple evaporators, one or more water-water heat exchangers, and multiple water-water heat exchangers are connected in series, and multiple evaporators Series connection or independent external connection; when multiple evaporators are connected in series, multiple evaporators are connected in series with the primary water-water heat exchanger and the generator in the heat pump / refrigerator; multiple evaporators When connected externally independently, multiple evaporators are connected in series in the first network water channel and the second network water channel respectively. The invention increases the temperature difference between water supply and return water in one network, improves the heat transfer capacity of the heat network, and the low temperature of return water in one network can avoid problems such as heat preservation and thermal compensation of the return water pipe network, thereby greatly reducing the investment cost of the pipe network And a network of water transmission and distribution energy consumption.

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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