Research on the Application of Passive Energy-Saving Technology in the Reconstruction of Existing Buildings

This paper puts forward the necessity of active adoption of passive energy saving technology in buildingreconstruction in our country firstly, and then combining practical projects,and the ecological reconstruction theory of Existing Buildings, analyzes and concludes five commonly used passive energy-saving technologies--environment improvement, passive solar power, energy-saving reconstruction of maintenance structure, natural lighting and ventilation and Energy strategy, trying to establish primary methods to apply passive energy-saving technologies to reconstruction of buildings so as to make better use of passive energy-saving technologies in practice. 1.IntroductionIn our country, the number of existing buildings is so large and buildings have problems of high energy consumption, bad internal and external environment.Limited by functions and economic conditions at the beginning of the construction, existing buildings can hardly meet current demands.Many buildings had been pulled down before they reached the expected design life, or been operating under high energy-consuming conditions, which resulted in the waste of energy and resources.Passive technologies can save energy totally through the form of building itself, enclosure structure and structural features in a easy, feasible, low-cost, economical, low-carbon green and effective way, thus it is more in line with the current situation of our country and should be taken into consideration before active energy-saving technology.The passive energy-saving technology originates from Germany.It refers to the technology that can achieve the goal of saving energy in buildings within the life circle, depending totally on the place, room, structural design and materials of building itself rather than any building service system that consumes energy, and optimizes suitable orientation, heat storage materials and natural ventilation equipment as well as cover devices, and that passively conducts acceptation, directly makes use of renewable resources and strengthens measures of thermal insulation and solar control to improve the acclimatization of buildings to local climate and natural environment and reduce energy consumption .