The year-round cold and heat source supply system and its operation method for the special process environment of the hospital

Abstract

The invention discloses a year-round cold and heat source supply system for a special process environment in a hospital and its operation method, which includes a cold water side heat exchanger and at least one pump assembly; the cold water side heat exchanger has two A cold water interface and at least one medium port group corresponding to the pump assembly, the medium port group includes a first medium port and a second medium port; the pump assembly includes a hot water side heat exchanger, a four-way valve, a compressor, a liquid storage Tank, auxiliary heat exchanger, first throttling device, second throttling device and domestic hot water heat exchanger; the hot water side heat exchanger has a first heat exchange medium port, a second heat exchange medium port and a The two hot water interfaces connected by the water pipeline; the two medium flow ports of the domestic hot water heat exchanger are connected with the air-conditioning hot water pipeline. It uses the excess heating capacity of the four-pipe heat pump unit to meet the heating load demand of the air-conditioning system in the special technological place of the hospital to heat the domestic hot water supply system of the hospital, greatly reducing the load of the hot water boiler to achieve energy saving. Effect.

Description

technical field [0001] The invention relates to a year-round cold and heat source supply system for a special process environment of a hospital and an operation method thereof. Background technique [0002] Common wards and office spaces in hospitals have requirements for comfortable air conditioning, which are generally met by the following methods: [0003] 1. In summer, the hospital generally has a refrigeration room in the basement. Chillers are used to provide the chilled water required for cooling the air-conditioning system of the whole hospital. The natural evaporation of the circulating water system of the cooling tower installed on the roof dissipates heat to the outside to reduce the temperature of the chilled water. This requires a large amount of water consumption and a large amount of heat discharge to the atmosphere. In this way, the combination of the chiller, the cooling tower and the supporting water pump system can achieve a SCOP value of about 4.0. [0...

AI Technical Summary

Problems solved by technology

[0004] 2. In winter, the air-conditioning system needs to provide heat source, which cannot be provided by chillers. The general design is to design another hot water boiler system to make hot water to solve the problem. The hot water supply temperature required by the air-conditioning system for heating is 45℃, The water temperature is 40°C; the energy efficiency ratio COP value of this process is about 0.8

[0009] 2. All year-round cold and heat sources are provided by two-pipe heat pump units, which either provide cold sources or heat sources, and cannot provide cooling and heating at the same time; and the air-conditioning systems in special technological places have dehumidification in summer working conditions In the two-pipeline system, the cold source provided by the heat pump unit is used for cooling, and the heating of the dehumidified air can only be completed by electric heating or hot water provided by the hot water boiler. The energy efficiency ratio of this heating process is relatively low, and the general COP value does not exceed 0.8 at most

[0012] 2. This will lead to a problem. The heat recovered by the four-pipe heat pump unit cannot be used by the air conditioning system. In order to ensure the balance of cold and heat, it has to be discharged into the atmosphere through the unit balance heat exchanger, resulting in a huge waste of energy.

[0015] 4. The hot water generated by the four-pipe heat pump unit itself is below 60°C, and there is still a temperature difference of 3°C when heating the domestic hot water through the plate exchange system. The actual hot water produced cannot directly meet the requirements of domestic hot water above 65°C Therefore, in the current application, it cannot directly replace the hot water boiler, but can only be used as an intermediate device for heating the water supply system of the hot water boiler, which can reduce the temperature difference of the hot water heating of the hot water boiler by about 25-30°C

Images