Abstract
BackgroundDuring the period of the “12th Five-Year Plan,” energy demand exhibited a rigorous growth trend along with the acceleration of industrialization and urbanization and the constant upgrading of consumption structure. Therefore, the path that all cities and provinces must take towards sustainable development required by the “13th Five-Year Plan” is to enhance research on the energy efficiency of buildings, especially existing buildings; sufficiently evaluate regional building energy demands and the characteristics of resources and environment; and formulate regional technical measures and policies for building practical energy efficiency measures.MethodsIn this research, building energy-saving technologies are classified into four categories, i.e., green energy efficiency technologies for building envelopes, renewable energy sources, HVAC equipment systems, and architectural environment control systems. The existing office buildings representing different architectural climatic regions (cold region A, cold region B, and hot-summer cold-winter region) under the jurisdiction of Shaanxi province, China, are selected as the objects of research to discuss “typical buildings” in-depth.Results and conclusionsThe research finds that even for buildings of the same type, the energy efficiency retrofit technologies selected for them are quite different because the buildings are situated in different climatic regions. For example, in regard to the materials, such as low-E hollow glass doors and windows, high transparency materials should be selected for cold regions, whereas sun-shading materials should be selected for hot-summer cold-winter regions. In comparison with the Standard for Energy Consumption of Civil Buildings (GB/T 51161-2016), the energy consumption of the existing office buildings that have been retrofitted can basically reach the threshold values specified by the national standard, but there is still a distance from the guideline values, which is related to the technology clusters selected and the economic category and can be corrected in practical applications.This research establishes technology cluster systems for energy efficiency retrofits that are suitable for different climatic regions. This work also assists relevant departments in formulating the local energy use quotas for existing public buildings, promotes the management of energy efficiency by local governments for public buildings, and provides theoretical and technical support for the low-carbon ecological development of Chinese cities.
Highlights
During the period of the “12th Five-Year Plan,” energy demand exhibited a rigorous growth trend along with the acceleration of industrialization and urbanization and the constant upgrading of consumption structure
From the perspective of the design stage, the phenomenon of “the output power of the electric supply equipment is large, but the load is small” exists in most public buildings, leading to a great difference between design and actual conditions. It can be seen from the statistical data of the Report on the Development of Building Energy Efficiency in China 2014 that there were large differences in the energy consumption of public buildings in different architectural climatic regions [6]
Based on the above research, we can reach the following main conclusions: (1) It is necessary to set up technology cluster systems for energy-efficient retrofits that are suitable for different climatic regions
Summary
During the period of the “12th Five-Year Plan,” energy demand exhibited a rigorous growth trend along with the acceleration of industrialization and urbanization and the constant upgrading of consumption structure. From the perspective of the design stage, the phenomenon of “the output power of the electric supply equipment is large, but the load is small” exists in most public buildings, leading to a great difference between design and actual conditions. It can be seen from the statistical data of the Report on the Development of Building Energy Efficiency in China 2014 that there were large differences in the energy consumption of public buildings in different architectural climatic regions (the figure mainly shows the difference between different climatic regions, and high energy consumption would be influenced by poor operational management) [6]. From the perspective of the design stage, the output power of the electric supply equipment is large, but the load is small in most public buildings, leading to a great difference between the design and actual conditions
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