Numerical study of the geometrical dimensions for glass curtain wall with an enclosed rectangular cavity

Abstract

ABSTRACT To gain further insight into the thermal performance of a glass curtain wall with an enclosed rectangular cavity, a 2D mathematical model was established to analyze the characteristics of radiation and convective heat transfer in the glass curtain wall with an enclosed rectangular cavity, as well as to evaluate the effect of the glass curtain wall structure on thermal performance. The results showed that the total heat flux of the glass curtain wall with an enclosed rectangular cavity decreased at a decreasing rate with the increase in emissivity of glass. The total heat flux of the glass curtain wall with an enclosed rectangular cavity decreased with the increasing height of the enclosed rectangular cavity. At 15 mm thickness of the glass curtain wall, the total heat flux reached its minimum value and then increased with further thickeness of the enclosed rectangular cavity. In addition, the least square method was used to obtain the Nu correlation of argon with a relative deviation of less than 12% for better predicting the flow and heat transfer characteristics of argon in the glass curtain wall.