A measure of heat loss in an element of the building envelope depending on the variable mass flow rate through the water flow glazing. It is indicated in units of Watts per meter squared per Kelvin W/(m 2 K).
Published in Chapter:
Dynamic Glazing With Higher Thermal and Optical Performance for Zero Energy Building Design
Fernando del Ama Gonzalo (Keene State College, USA), Allison L. Zannoni (Keene State College, USA), Belen Moreno Santamaria (Universidad Politecnica de Madrid, Spain), and Juan Antonio H. Hernandez Ramos (Universidad Politecnica de Madrid, Spain)
Copyright: © 2022
|Pages: 18
DOI: 10.4018/978-1-6684-4030-8.ch003
Abstract
One of the most critical objectives in buildings is their adaptation to environmental conditions in order to optimize energy performance as well as the thermal and visual comfort of the occupants. This issue is relevant, for example, in public buildings that incorporate large glazed surfaces, where overheating and a lack of thermal and visual comfort are common, especially in Mediterranean countries. The headmost cause of increased air conditioning loads is direct solar radiation on transparent surfaces. However, the significant losses through glazed surfaces in cold climates also cannot be ignored. Therefore, solar protections must be used, thus observing the harmful effects of the absence of solar radiation on energy loads in winter. This chapter aims to study and compare construction materials recently introduced to the market, such as dynamic glasses, with significantly higher thermal and optical performance than traditional glasses.