The Energy Efficiency Design Research Of Building Envelope For Cold Regions

As energy issues become increasingly prominent,energy saving has become the focus of worldwide attention.China's energy consumption as a big country,a building energy consumption only on the total national energy consumption accounted for about 1/3.Based on such a large background, building energy conservation has become an extraordinary significance.Accompanied China's rapid economic growth is rapid and large-scale construction industry's prosperity,while China's energy-saving construction is lagging behind,resulting in the consequences of that country's urban and rural areas have been completed more than 95%of buildings for the construction of high energy consumption.Cold regions,as its main building energy consumption for winter heating energy consumption, only the national average of more than about 27%,accounting for the region's total energy consumption 30%to 40%,while the cold region of 73%of building energy consumption to 77%is lost through the envelope system,so the energy-saving design envelope system is essential and it is closely related to the cold regions of the energy-saving effectiveness of the whole buildings.Building envelope system is a space for internal and external construction material,energy,as well as an important medium of information exchange,but also the loss of building energy consumption in cold regions of the major route of transmission.To carry out energy-efficient building envelope system design can be divided into two phases or two steps:the first phase referred to as the "concept design" stage,by adjusting the direction of construction,building shape factor and the window wall ratio,the architectural design of qualitative and to consider the energy-saving construction;in the program to determine the next stage after the "structural design" stage,by adjusting the envelope system components:the external walls,external doors and windows,roof and ground-based energy-saving construction,from the perspective of quantitative analysis of the whether the energy-saving construction(that is,whether or not to meet energy-related provisions).In meeting the requirements on the basis of the care system by adjusting the external insulation thickness,insulation materials,windows and doors form the basis of operation;or through the use of new energy-saving technologies and other measures to affect the thermal resistance building envelope systems,heat transfer coefficient and The purpose of energy transfer means,to achieve reduction in the external construction of the retaining structure of heat consumption.Then from the economy,the points of adaptability choose the relative energy-saving design optimization.Through the operation of the actual cases,this energy-efficient design flow for inspection, there are problems during the show,I hope that continuing to fulfill my original intention of writing this paper.Supporting energy-saving software makes this process easy with the operational interoperability,so that more energy-saving design can be refined through the various stages of design of energy-efficient than the best,come up with a reasonable energy-efficient design possible. Awareness and understanding of the above,want to summarize the basic theory and practical application of the aggregate testing,building energy saving for the future can provide a valid reference point.