Space humidity control method for floor board cold supply composite displacement ventilation system

Abstract

The invention discloses a space humidity control method for a floor board cold supply composite displacement ventilation system. The control method comprises the steps that 1, the action temperature threshold value range of a working are is set to be [tod, tou], and the relative humidity threshold value range is set to be [phi d, phi u]; 2, basic environment parameters of the working area are collected during different periods of time, and the parameters comprise working area temperature ta, the working area relative humidity, the wind supply relative humidity, the average radiation temperature tr and the staff number nr; 3, the lowest cold supply energy consumption of the composite displacement ventilation system takes as an object function, the working area working temperature range andthe relative humidity range are taken as the constraint conditions, the optimal wind supply temperatures under different floor board temperatures are calculated according to the collected basic environment parameters, and the cold load ratio borne by cold radiation floor boards and the composite displacement ventilation system under the optimal wind supply temperatures is calculated; and 4, the working area humidity is adjusted and controlled according to the wind supply temperatures and the cold load ratio obtained through calculation. According to the method, the energy consumption of the composite system is the lowest, the requirement for the comfort level of the working area is met, and control over humidity of the large-space working area is achieved.

Description

technical field [0001] The invention relates to an air-conditioning humidity control method, in particular to a space humidity control method of a floor cooling composite displacement ventilation system. Background technique [0002] When the existing floor radiant cooling composite displacement ventilation system operates, such as figure 1 As shown, due to the limitations of the operating temperature in the working area and ground anti-condensation conditions, the radiant cooling capacity of the floor is limited to a certain extent, thus increasing the cooling energy consumption of the cold radiant floor. On the other hand, in order to ensure the temperature and humidity control in the work area, the displacement ventilation system needs to bear part of the cooling load and all the humidity load in the work area. Workspace comfort. [0003] According to relevant literature and experimental data, when the temperature difference between the floor temperature and the supply ...

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Problems solved by technology

However, their research usually mainly considers the thermal comfort of the working area of ​​the system. The research on the energy consumption of the composite system is mainly the analysis of the overall change law, and no quantitative conclusions are drawn for a certain humidity condition in the working area, and there are few studies Adjustment method of compound system cooling capacity ratio when the humidity in the work area changes

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