Thermal Characteristics And Energy Consumption Analysis Of Building Transparent Envelope

Transparency of envelope is crucial importance for the building. With the continuous development of construction technology, large area of glass as a retaining structure is widely used in the construction of its simple appearance of transparent effect gives a flavor of the times and technological strength of impression. Large area of glass provide good lighting at the same time bring indoor comfort lowe,heating and cooling energy consumption of the high risks.Transparent envelope of a building usually consists of architectural doors and windows, glass curtain wall, glass skylights, are formed from metal components and glass building non-load-bearing external supporting structure.In this paper, a transparent envelope of the type of construction and development, architectural windows, glass curtain wall, glass lighting the top of the development, structure and classification were studied in detail, from the heat transfer theory, the establishment of a single window, multi-layer of glass-enclosed space in the physical layer of the system heat transfer model and the heat balance equation, using all parts of the method according to an area-weighted heat transfer coefficient of the entire tang windows, solar heat gain coefficient, visible transmittance was calculated; set up with Solar radiation outside of the breathing cycle of the glass curtain wall model of a simple mathematical physics, solar radiation are listed under the dynamic heat balance equation to calculate inter-layer ventilated air temperature and heat flux through the thermal resistance network to express heat passage within the heat transfer process; to consider the sun in the water level of radiation far higher than the radiation in vertical plane, while the glass roof and glass curtain wall lighting, windows compared to the angle of the conversion due to space thermal characteristics of the differences, to the upper semi-hollow steel laminated glass for the lighting of the top representatives of, in the right lighting inside and outside the top surface of convective heat transfer, radiation heat transfer and heat transfer analysis of spatial layers based on the obtained hollow upper half of steel laminated glass lighting and lighting and the top of the top mass thermal resistance heat transfer coefficient.Glass skylights, architectural windows, glass curtain wall building, represented by a transparent envelope, providing lighting, ventilation, heat and insulation to improve indoor air quality, the possibility of improving the indoor thermal environment, these features are and their thermal characteristics of close contact with, and this also shows that the structure of energy-saving aspects of a transparent enclosure with a larger than the non-transparent envelope tap potential.Based on theoretical analysis and experimental test, taking into account windows, glass walls, glass skylight their own characteristics, this article elaborated the transparent envelope of energy-saving features of their properties in detail. Pointed out that in the transparent envelope design, summer heat is the principal contradiction, winter use of solar energy is a secondary contradictions, summer heat should be taken seriously as a primary contradiction.Finally a transparent envelope full Outlook application prospects and direction of development, proposed a "green", "smart building envelope" concept.This paper seeks to design from a thermal point of view of energy-saving characteristics of a transparent envelope to make a more comprehensive analysis, hoping to windows, glass curtain wall, lighting the top of the architectural structure of a transparent envelope design, construction, management and application reference.