Cold and hot water double-loop air-conditioning system

Abstract

The invention relates to a cold and hot water double-loop air-conditioning system; a cold water supply pipe and a hot water supply pipe are respectively provided with a conversion valve; a cold water pipeline system is provided with a cold water tail end heat exchange device, and a hot water pipeline system is provided with a hot water tail end heat exchange device; during the refrigeration operation in summer, the cold water pipeline system and the cold water tail end heat exchange device are used; and during heating operation in winter, the hot water pipeline system and the hot water tail end heat exchange device are used. The invention also relates to a design method of the natural heat exchange type hot water tail end heat exchange device; and after the natural heat exchange type hot water tail end heat exchange device is applied, noise-free operation in a room during heating of winter can be realized, and more than 33% of energy can be saved compared with a single-loop cold and hot water air-conditioning system.

Description

technical field [0001] The present invention relates to air-conditioning technology, in particular to a design method for a cold and hot water double-circuit air-conditioning system and natural heat-exchanging hot water terminal heat exchange equipment. The application of this technology in air-conditioning winter heating has a very significant energy-saving effect . Background technique [0002] In the field of air conditioning technology, the cold and hot water air conditioning system composed of heat pump cold (hot) water air conditioning units, when operating under the two working conditions of summer cooling and winter heating, the air conditioning cold and hot water systems usually use the same Although the water circulation system and the same terminal heat exchange equipment can simplify the cold and hot water air conditioning system, it increases the indoor heat exchange temperature difference during the winter heating process, and the result will inevitably lead to...

AI Technical Summary

Problems solved by technology

[0002] In the field of air conditioning technology, the cold and hot water air conditioning system composed of heat pump cold (hot) water air conditioning units, when operating under the two working conditions of summer cooling and winter heating, the air conditioning cold and hot water systems usually use the same The water circulation system and the same terminal heat exchange equipment, although this approach can simplify the cold and hot water air conditioning systems, but increases the indoor heat exchange temperature difference during the winter heating process, which will inevitably lead to unnecessary waste of energy

[0003] We know that the comfortable temperature in the cooling room in summer is 22~28°C, and the temperature in the heating room in winter is 18~24°C. It is currently used in heat pump cold (hot) water air conditioning units operating under two working conditions: summer cooling and winter heating. , the cold water supply / return water temperature in summer is 7 / 12°C, the heat exchange temperature difference between the air-conditioning cold water and the air-conditioning indoor temperature is 15-21°C, and the heating water supply / return water temperature in winter is The heat transfer temperature difference between the water and the indoor temperature of the air conditioner is 21 to 27°C. Therefore, for the cold and hot water air conditioning system, the heat transfer temperature difference between the cold and hot water temperature and the indoor temperature is different in summer and winter. It is obviously unreasonable to use the same system and the same terminal heat exchange equipment

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