Evaluate on the thermal insulation efficiency and surface condensation of air supply window system applied to dual double-glazed window

Abstract

It still remains heat loss and high risk of moisture condensation oceurrenoe at glass of window because they have relatively poor insulating qualities and usually contribute the greatest heat loss in residential buildings. To solve these problems, this paper proposed air supply type airflow window system applied to dual double-glazed window combine with a mechanical ventilator and a heat-recovery heat pump system. The aim of this paper is to evaluate the thermal insulation efficiency and probability of moisture condensation in the proposed system using numerical simulation. To verify its thermal insulation efficiency and probability of moisture condensation, the temperature distribution and the dewpoint temperature of the surface of window was calculated. The calculated results show the energy saving efficiency of the proposed system is enhanced approximately 113.10% by airflow effect in comparison with the dual double-pane window. It also shows that it is effective to use low emission film to avoid moisture condensation occurrence.