Hospital special technological environment full-year cold and heat source supply system and operation method thereof

Abstract

The invention discloses a hospital special technological environment full-year cold and heat source supply system and an operation method thereof. The system comprises a cold water side heat exchanger and at least one pump assembly. The cold water side heat exchanger is provided with two cold water connectors connected with an air conditioner cold water pipeline and at least one medium port set corresponding to the pump assembly, and the medium port set comprises a first medium port and a second medium port; the pump assembly comprises a hot water side heat exchanger, a four-way valve, a compressor, a liquid storage tank, an auxiliary heat exchanger, a first throttling device, a second throttling device and a domestic hot water heat exchanger; the hot water side heat exchanger is provided with a first heat exchange medium port, a second heat exchange medium port and two hot water connectors connected with an air conditioner hot water pipeline; and two medium flowing ports of the domestic hot water heat exchanger are connected with the air conditioner hot water pipeline. By means of the system, a four-pipe heat pump unit is used for heating a hospital domestic hot water supply system by utilizing redundant heating capacity except for meeting the heating thermal load requirement of an air conditioning system in a special technological place of a hospital, so that the load of a hot water boiler is greatly reduced, and the energy-saving effect is achieved.

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 chillers, cooling towers and supporting water pump systems can achieve a SCOP value of about 4.0. [0004] 2. I...

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 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-pipe 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 the domestic hot water is heated through the plate replacement system. The actual hot water produced cannot directly meet the requirements of domestic hot water above 65°C , so 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