Scheme Evaluation of Energy-Saving Renovation of Enclosure Structure of Long-Rent Apartment

In recent years, owing to the development of national policy and the change of social demand, long-rent apartments have gradually become essential in urban development. In the first and second-tier cities in China, the difficulties of purchasing houses and poor rental environment have brought great troubles to the vast number of non-native tenants. However, the development of long-rent apartments not only integrates a large number of existing housing, improves the rental environment, but also promotes the large-scale development of China’s rental industry to a certain extent. Most of existing buildings have a long-life span without energy-saving and relevant environmental protection equipment installed. Thus, as time goes on, more energy has been consumed, leading to environmental impacts. On the other hand, while a large number of existing buildings, such as residential and factory buildings, are transformed into long-rent apartments by changing outer appearance and inner space division of buildings, issues of energy conservation and green construction have not been involved. In consequence, this paper tries to develop a complete set of evaluation system for the energy-saving renovation plan of the long-rent apartment enclosure structure by using method of Analytic Hierarchy Process (AHP), energy simulation software and interview to compare and select energy-saving renovation schemes for buildings. In the evaluation system, analysis of the costs of building energy-saving renovation with the economic and environmental benefits is included, providing developers to have more favorable choices for social development in building renovation. This evaluation method will help increase the enthusiasm of developers for energy-saving renovation and benefit the diversified development of green buildings in China.