Multiple closed loop soil-derived water-water heat pump system

Abstract

The invention discloses a multi-component closed-circuit soil source water-water heat pump system. The source side outlet of the water-water heat pump (7) is connected with a first circulating water pump (6), and the water-water heat pump (7) passes through the first circulating water pump ( 6) Connect the first valve (8), the underground coupling heat exchanger, and the second valve (9) in series to form the first source-side loop, and the water-water heat pump (7) connects the third valve ( 4), the heat exchanger (3), and the fourth valve (5) are connected in series to form a second source-side loop, and the other heat exchange end of the heat exchanger is connected to a cooling tower (16) through a second circulating water pump (2); A fifth valve (10) is connected in front of the second valve (9) and behind the third valve (4), and a sixth valve (12) is connected in front of the fourth valve (5) and behind the first valve (8). The present invention is suitable for projects in hot summer and cold winter regions where the air conditioning load in summer is greater than the heating load in winter, can greatly reduce the initial investment of heat pump systems in this type of project, and improve the energy efficiency and reliability of the system. Multiple closed-circuit soil source water - Water heat pump system.

Description

technical field [0001] The invention relates to a heat pump system, in particular to a multi-element closed-circuit soil source water-water heat pump system composed of a cooling tower and a closed-circuit underground coupling heat exchanger. Background technique [0002] The pure soil source heat pump system uses the underground soil as the heat source or heat sink, and is mostly used in heating and air conditioning projects. In order to make full use of the heat in the underground soil structure, the size of the underground coupling heat exchanger is determined according to the heating load (maximum heat absorption) under a certain non-guaranteed rate, or the cooling load (maximum heat dissipation) under a certain non-guaranteed rate , so that the designed underground heat exchanger is large enough, coupled with the high cost of the underground heat exchanger, resulting in high cost of the entire heat pump system. Such a system is only suitable for heating-based cold area...

AI Technical Summary

Problems solved by technology

If the underground heat exchanger is designed according to the amount of heat discharged in summer, the initial investment of the system is obviously too high, which has too much margin to ensure the heat absorption and system efficiency of the system during heating and heating in winter; , due to the long running time in summer, the return water temperature of the underground coupling heat exchanger may be too high and the cooling efficiency will be reduced, and the cooling capacity and reliability of the system will be reduced

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