Investigation Into Energy And Comfort Of Large Commercial Buildings In Cold Area

In recent years, new design elements like lighting atrium and indoor business street have been widely used in large commercial buildings. While new commercial building scape becomes larger and larger, more and more high quality, its high energy consumption problem becomes more prominent, but the energy-saving related research is still in its early stage. How to achieve the balance of form, function and energy, is a question that architects need to think about.This paper takes Tianjin for example, in connection with the status of energy consumption and comfort of large commercial buildings in cold areas, handles energy-saving policy related research from the perspective of architectural design. Through the environmental test for six large commercial buildings in summer, winter and transition season, we reached conclusion that factors affecting the energy consumption and comfort of commercial building include overall layout, building size, function zoning, building envelope, atrium scale, etc.The climate under extreme winter and summer conditions has major influence on architectural energy-saving design in cold area, and the largest proportion of total energy consumption in Tianjin commercial buildings are air conditioning and lighting. Therefore, the key to energy efficiency of commercial buildings in cold regions is windproof and heat preservation in winter, sun and heat insulation in summer, and minimization of the use of artificial lighting.In this paper, using airpak and designbuilder simulation software, handles energy related research from the perspective of the atrium space form, atrium lighting design and construction feature, validating controlling indoor thermal environment through controlling atrium size and positional relationship; Atrium lighting design should consider the material properties of light transmission and thermal property, shading design, artificial design and etc., and saving lighting energy consumption while ensuring the indoor lighting environment; Presents it should be considered in light of various types of function space, the temperature of the different needs, through reasonable zoning and traffic flow line function effectively prevent proper organization of regional gathering crowd, optimizing overall indoor temperature distribution.The commercial building energy efficiency design should consider its space design elements such as scale grasping, form design, functional organization and so on, and coordinate with technical strategies like ventilation, lighting, shading, heating and cooling, etc. It should be implemented in all periods from architectural design to operation management.