Temperature and humidity separately controlled centralized air conditioning system

Abstract

The invention belongs to the field of heating and ventilating, and discloses a temperature and humidity separately controlled centralized air conditioning system which comprises a centralized cold andheat source host machine, a hydraulic module, a tail end and a fresh air handling unit. The hydraulic module comprises a primary side pipeline, a heat exchanger and a secondary side pipeline, whereinthe primary side pipeline is connected with the centralized cold and heat source host machine through a pipeline, and the heat exchanger is used for exchanging heat between a cold and heat source ofthe primary side pipeline and water of the secondary side pipeline; the tail end arranged a user end communicates with the secondary side pipeline and is used for processing indoor sensible heat loadin the user end; and the fresh air handling unit is arranged at the user end and comprises a pre-cooling section and a cooling dehumidification section, the pre-cooling section communicates with the secondary side pipeline and is used for pre-cooling fresh air, and the cooling dehumidification section is used for performing isothermal dehumidification on the pre-cooled fresh air. The double-cold-source fresh air handling unit is adopted, so that deep dehumidification can be realized, and the dehumidification effect is improved; the centralized cold and heat source host machine does not need toconsider the dehumidifying capacity, so that the host machine can use medium-temperature chilled water as a cold source, evaporation temperature of the host machine is improved, and therefore systemenergy efficiency is obviously improved.

Description

technical field [0001] The invention relates to the field of heating and ventilation, in particular to a centralized air-conditioning system with separate temperature and humidity control. Background technique [0002] In the existing centralized residential air-conditioning system with temperature and humidity control terminals, in summer, the main unit of the air conditioner is generally used to generate cold water to supply to the radiation terminal and the centralized fresh air system, and at the same time solve the heat and humidity load of the building. However, the sensible heat end of the system adopts a radiation system, and the cooling speed is slow under the condition of instantaneous large load; and due to the influence of factors such as pipeline temperature rise, hydraulic imbalance, and extreme hot and humid outdoor conditions, the use of a centralized single cold source makes it difficult to guarantee the dehumidification effect. Seriously affect thermal comf...

AI Technical Summary

Problems solved by technology

However, the sensible heat end of the system adopts a radiation system, and the cooling speed is slow under the condition of instantaneous large load; and due to the influence of factors such as pipeline temperature rise, hydraulic imbalance, and extreme hot and humid outdoor conditions, the use of a centralized single cold source makes it difficult to guarantee the dehumidification effect. Seriously affect thermal comfort

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