A heating system that uses heat pump technology to improve the heating capacity of central heating pipe networks

Abstract

The invention discloses a heating system utilizing a heat pump technology to improve the heat capacity of a central heating pipe network and belongs to the field of central heating. The heating system provided by the invention comprises the central heating pipe network, wherein the central heating pipe network is divided into a primary net and a secondary net; the heating system also comprises anabsorption heat pump set, a primary net water supply pipeline is connected with the generator of the absorption heat pump set by virtue of a pipeline, and the primary water supply is taken as the driving heat source of the absorption heat pump; a primary net return pipe is connected with the evaporator of the absorption heat pump set by virtue of a pipeline, and a primary net backwater is taken as the lower-temperature heat source of the absorption heat pump set; and a secondary net backwater enters into the absorber and condenser of the absorption heat pump set in turn so as to be heated, warmed and then output as a secondary water supply. The heating system provided by the invention has the advantages of further increasing the temperature difference of the water supply and backwater of the primary net, and improving the heat transfer capability of the heating pipe net.

Description

technical field [0001] The invention belongs to the field of central heating, and in particular relates to a heating system which utilizes heat pump technology to improve the heating capacity of a central heating pipe network. Background technique [0002] With the rapid development of China's urbanization process, the scale of urban central heating continues to expand, and the heating load within the radiation range of the existing central heating pipe network continues to increase. The central heating pipe network has or will soon face the problem of insufficient transmission capacity. , There are two ways to solve it: one is to re-lay large-scale heating network pipes, and the other is to further increase the temperature difference between the supply and return water of the primary network hot water, and improve the heat transfer capacity of the existing heating pipe network. [0003] On the one hand, the construction period of re-laying the heating pipe network is long, ...

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Problems solved by technology

[0003] On the one hand, the construction period of re-laying the heating pipe network is long, and the existing roads and municipal facilities in the city need to be destroyed, which will inevitably affect urban traffic and normal life. Moreover, the investment in the new heating pipe network is huge, and it also causes waste of the original pipe network facilities, etc. On the other hand, at present, the supply and return water temperatures of the urban central heating primary network are generally 120-65°C, and the water supply temperature of the primary network is limited by factors such as pipeline insulation, materials, safety, and heating sources, and cannot continue to increase. For conventional heat network heat exchangers, the return water temperature of the primary network is higher than that of the secondary network. Due to the limitation of the heat requirements of the secondary network, the return water temperature of the primary network cannot continue to decrease

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