Steam heat pump system with combined cold and heat supply

Abstract

The invention relates to the technical field of heat pumps, and particularly discloses a steam heat pump system with combined cold and heat supply. The steam heat pump system comprises a low-temperature heat pump unit, a water supply pipeline, a high-temperature heat pump unit, a third circulation loop, a flash tank, a first-stage water vapor compressor and a water supplementing pipeline, wherein the low-temperature heat pump unit comprises a low-temperature heat pump evaporator, a low-temperature heat pump compressor, a low-temperature heat pump condenser and a low-temperature heat pump expansion valve which are sequentially connected in series to form a first circulation loop; the high-temperature heat pump unit comprises a high-temperature heat pump evaporator, a high-temperature heat pump compressor, a high-temperature heat pump condenser and a high-temperature heat pump expansion valve which are sequentially connected in series to form a second circulation loop; the water supply pipeline is connected with the low-temperature heat pump evaporator; the low-temperature heat pump unit and the high-temperature heat pump unit are connected through the third circulation loop; one end of the flash tank is connected with the high-temperature heat pump condenser, and the other end of the flash tank is connected with the first-stage water vapor compressor; and the water supplementing pipeline is connected with the high-temperature heat pump condenser in the high-temperature heat pump unit. According to the steam heat pump system, combined cold and heat supply can be realized, and hot water and steam can be supplied to users.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a combined cooling and heating steam heat pump system. Background technique [0002] The heat pump system converts the low-grade energy in the low-temperature heat source into high-grade energy by consuming a certain amount of electric power. During this process, the heating power far exceeds the electric power consumed by the heat pump system, so it is a very competitive energy conversion device. . As the country's demand for low-carbon and green energy development is increasing, the use of heat pumps to replace electricity can effectively reduce the use of fossil fuels, reduce carbon emissions, and thereby reduce air pollution. The use of heat pump systems can also improve energy utilization. Therefore, it has important economic and environmental significance. [0003] At present, on the one hand, heat pumps are used for cooling and heating in a single way, that is, a set ...

AI Technical Summary

Problems solved by technology

[0003] At present, on the one hand, heat pumps are used for both cooling and heating in a single way, that is, a set of heat pump units can only perform one function of cooling or heating

When the heat pump machine is used for cooling, all the heat generated at the condenser end is discharged; when the heat pump unit is used for heating, all the cooling capacity generated at the evaporator end is discharged, and the low-temperature heat source at the evaporator end undergoes heat exchange. Very low, when water is used as a low-temperature heat source, most of it is discharged directly, the cooling capacity is wasted, and the energy efficiency of the system is relatively low

[0004] On the other hand, the existing high-temperature heat pump unit needs a low-temperature heat source with a relatively high temperature (greater than 60°C) when heating, which makes the low-temperature heat source with a lower temperature (less than 60°C) wasted. The scope of use of high-temperature heat pumps; in addition, a large amount of medium and low-pressure steam is required in industrial production, and most of the existing high-temperature heat pump systems cannot directly produce steam and cannot meet industrial needs

Images