Energy Conservation Design Research Of Exterior Wall Of Building In Hot Summer And Cold Winter Zone Of China

Building envelope protects human from harsh natural environment. A good building envelope design can not only provide good comfort but also reduce energy consumption. There have been a lot of studies on the design of thermal insulation and thermal mass of building envelope, including those focusing on the hot summer and cold winter zone of China, which calls for special attention. However, most studies on the zone are case specific and are not conclusive. Therefore, further studies are still needed on the thermal properties of building exterior wall with different insulation forms and thermal mass in the hot summer and cold winter zone of China.This thesis uses Hangzhou as a representative city in the hot summer and cold winter zone of China. A single exterior wall model was set up and the energy performance was calculated using Energy Plus to study the influences of insulation position, thermal mass, and heat sources. Eight typical weather periods were summarized based on Hangzhou’s typical meteorological year data. Three types of operation modes were considered:Type Ⅰ as daytime use only (office、meeting room、 market etc.), Type Ⅱ as day and night non-intermittent use (some residential buildings), and Type Ⅲ as night time use only (other residential buildings). Six exterior wall types were considered with thermal mass either large or small and insulation either exterior located, interior located, or not used.The results were as follows:Insulation of exterior walls can reduce energy consumption for all cases. For type Ⅰ buildings, interior insulation form is more energy efficient; For type Ⅱ buildings, exterior insulation form is better, For type Ⅲ buildings, interior insulation form is better; The thermal mass has limited impact on exterior wall heat load.