Forecasting method for obtaining temperature and humidity on surface of clothes according to thickness of under-clothes air layer

Abstract

The invention relates to a forecasting method for obtaining temperature and humidity on the surface of clothes according to the thickness of an under-clothes air layer. A clothes system consisting of an under-clothes air layer, a fabrics layer and a boundary air layer is provided in the method. The forecasting method comprises the steps of: respectively establishing thermal and humidity transfer equations from the surface of the skin through the under-clothes air layer, the fabrics layer and the boundary air layer, and solving the temperature and the humidity amount of the surface of the clothes according to the thermal and humidity balance theory under a steady-state condition. The forecasting method can be used for obtaining the critical thickness of the under-clothes air layer transformed from the conduction to the natural convection, analyzing the influence of the under-clothes air layer on the thermal and humidity transfer property passing through the clothes system, and is suitable for forecasting the dressing clothes surface temperature and humidity distribution of a human body wearing different clothes with loose and comfortable degrees.

Description

technical field [0001] The invention belongs to the technical field of heat and moisture transfer mechanism research of the human body-clothing-environment system, and particularly relates to a method of obtaining the heat and water vapor transferred from the human body to the external environment according to the thickness of the air layer under the clothes, thereby predicting the temperature and moisture content of the clothing surface Quantitative forecasting method. Background technique [0002] The air layer under the clothes, which is located between the human skin and the inner surface of the clothing, is in direct contact with the human skin, which has a direct impact on the thermal and humid comfort of the human body. The thermal conductivity of still air is much lower than that of ordinary textile fibers, so the thicker the air layer, the less heat will be lost from the human body. But when the air layer reaches a certain thickness, there will be natural convectio...

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Problems solved by technology

But when the air layer reaches a certain thickness, natural convection will appear in the space under the clothes, which instead increases the heat dissipation from the human body to the external environment.

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