Air conditioning unit system of water source heat pump in reservoir for underground hydropower station

Abstract

The invention discloses an air conditioning unit system of a water source heat pump in a reservoir applicable to an underground hydropower station. The air conditioning unit system comprises a water intake system, a direct cold-supplying system, a heat-pump cold-heat supplying system and an air treatment system, wherein the water intake system consists of a water intake head, a water intake pipe, a cleaner and a water intake pump; the direct cold-supplying system consists of a first electric adjusting valve, a first surface cooler, a second electric adjusting valve and pipelines connected between the water intake system and the parts; the heat-pump cold-heat supplying system consists of a first heat exchanger, a compressor, a four-way valve, a second heat exchanger, a chilled water circulating pump, a second surface cooler, a first expansion valve, a first one-way valve, a second expansion valve, a second one-way valve, a third electric adjusting valve, a fourth electric valve and pipelines connected among the parts; and the air treatment system consists of the first surface cooler, the second surface cooler and a rotary-wheel dehumidifying mechanism. The air conditioning unit system disclosed by the invention has the advantages that good operation of various functions such as cooling, heating and dehumidifying of cavern groups of the underground hydropower station in the whole year can be ensured, and a great amount of energy is saved in the transition season.

Description

technical field [0001] The invention relates to a surface water source heat pump central air-conditioning unit, in particular to a reservoir water source heat pump system for controlling the hot and humid environment of caverns of underground hydropower stations, and is especially suitable for the working environment of underground caverns of hydropower stations. Background technique [0002] Hydropower stations have the characteristics of large installed capacity, large number of units, large number of electrical equipment, large heat generation, and significant humidity transfer in underground caverns. Great energy consumption. [0003] It is an energy-saving and low-carbon refrigeration technology to use surface water (river water, lake water, sea water) or groundwater as cooling water to remove condensation heat from the condenser. The working principle diagram of the surface water source heat pump unit currently used is as follows: figure 1 and figure 2 shown. in ...

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Problems solved by technology

[0004] Chinese patent application (application number 200610102097.2) discloses a high-efficiency water source heat pump unit suitable for low water temperature in rivers, rivers, lakes, and seas. It determines the appropriate first-stage water source heat pump evaporation temperature and condensation temperature according to the temperature of the input water source. Provide suitable water source input temperature for the second-stage water source heat pump, thereby solving the problem of working efficiency of the water source heat pump unit under low temperature water source below 2°C

[0005] Chinese patent application (application number 201110033862.0) discloses a seawater source water loop heat pump device for air conditioning systems, which uses a seawater plate heat exchanger to exchange heat between the heat exchange medium and seawater, avoiding seawater entering the water -Water heat pump unit, to solve the problem of corrosion of seawater to water source heat pump unit equipment

However, in the hot summer, due to the increase of the load, the water temperature becomes higher, and free cooling is not suitable. At the same time, in the cold winter, heating is also required.

Moreover, during the period of free cooling, since the water temperature does not reach the dew point temperature required for dehumidification, there is also a problem with dehumidification

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