Central air conditioning system and control method for super high-rise building

Abstract

The invention discloses a central air conditioning system and a control method for a super high-rise building. The Central air conditioning system and the control method for the super high-rise building comprises a low-area air conditioning system, a high-area air conditioning system, an ultra high-area conditioning system and a highest-area air conditioning system, wherein the low-area air conditioning system comprises a general air-condition cold water main engine, a low-area chilled water circulating pump and low-area users, the high-area air conditioning system comprises a high-area heat exchanger, a high-area chilled water circulating pump and high-area users, the ultra high-area conditioning system comprises a ultra high-area heat exchanger, a ultra high-area chilled water circulating pump and ultra high-area users, the highest-area conditioning system comprises a highest-area heat exchanger, a highest-area chilled water circulating pump and highest-area users. By the adoption of a closed system, chilled water of a common loading capacity cold water main engine is guaranteed to be provided to each terminal with only once heat transfer to reduce twice or three times heat transfer and the fact that a large number of air-condition main engine energy consumption under the premise of meeting the requirement of terminal humiture is saved is achieved, the central air conditioning system and the control method for the super high-rise building meets the requirement of energy-saving and cost-reducing environment. The central air conditioning system and the control method for the super high-rise building is reliable in project and good in energy-saving effect.

Description

technical field [0001] The invention is a central air-conditioning system for super high-rise buildings and its control method, which belongs to the innovative technology of the central air-conditioning system and its control method for super high-rise buildings. Background technique [0002] Now there are more and more super high-rise buildings, and the building height is getting higher and higher. Since the working pressure of ordinary air-conditioning equipment does not exceed 1.6MPa, if the installation height difference of air-conditioning equipment in super high-rise buildings exceeds 320 meters, it is necessary to customize high-pressure equipment. , the cost will increase a lot; or the heat exchanger is divided into three or more areas, cascade heat exchange, the high area heat exchanger is connected to the low area heat exchanger, and the installation height difference of the air conditioning equipment in each area is uniform. No more than 160 meters, so that ordina...

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Problems solved by technology

[0002] Now there are more and more super high-rise buildings, and the building height is getting higher and higher. Since the working pressure of ordinary air-conditioning equipment does not exceed 1.6MPa, if the installation height difference of air-conditioning equipment in super high-rise buildings exceeds 320 meters, it is necessary to customize high-pressure equipment. , the cost will increase a lot; or the heat exchanger is divided into three or more areas, cascade heat exchange, the high area heat exchanger is connected to the low area heat exchanger, and the installation height difference of the air conditioning equipment in each area is uniform. No more than 160 meters, so that ordinary equipment can be used, and the cost can be reduced, but this will bring problems such as increased energy consumption

Among them, using the current plate heat exchanger with relatively high heat transfer efficiency, the heat transfer temperature difference is also difficult to reach within 2°C. Main engine parameters, for each additional set of heat exchangers, the heat exchange temperature difference will increase by 2°C, and the energy consumption of the air conditioner host will increase by 8%-10%. If three or more heat exchanger groups are used, the energy consumption of the air conditioner host will increase by more than 20%. At the same time, due to the rise of chilled water temperature, not only the use comfort is reduced, but also a larger volume of air-conditioning terminals and pipelines is required, which increases equipment investment and construction investment

Since the energy consumption of the air-conditioning host accounts for about 70% of the energy consumption of the air-conditioning system, this will inevitably increase a large amount of energy expenditure

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