Residential Building Window's Heat Transfer Coefficient Research And Analysis In The Strict And Cold Region

This thesis mainly discussses the limit value of overall heat transfer coefficient of energy efficiency window and performances of heat transfer of the glass system in the strict and cold region. It calculates the limit value of overall heat transfer coefficient and the times of room ventilation exchange on energy efficiency 65% at the base of energy efficiency 50%. It makes use of the WINDOW5.2 software of Lawrence Berkeley National Laboratory University of California,which simulates the glass spacing fill with the air , the inert gases and the positions of Low-e glass films to influence of the heat transfer coefficient in double-glazed, triple-glazed systems. Adopt experiment of the hot box method to carry on the research to the triple-glazed of single frame plastic windows, which contrast with the calculation of the theories formula in a method of numerical value repeatedly and the simulations of the WINDOW5.2 software.We get the limit value of overall heat transfer coefficient of window 1.8 W/(m2·K) and the times of room ventilation exchange 0.5次/h by calculation on energy 65%, making sure the best air space between the layers , the best inert gases space between the layers and coating the film position in the double-glazed or triple-glazed systems. The experiment results are near solution in theory and the simulations of software. It is good foundation for further research of the other functions of window.