Method for determining climatic design conditions based on the indoor thermal environment risk level

Abstract

Currently, climatic design conditions are usually selected according to the frequency of climatic parameters themselves, which method cannot reflect the indoor thermal environment risk level of the building in design. In this regard, the research proposes to construct the correlation between climatic design conditions and indoor thermal environment risk level, and explore the effect of uncertainty in building thermal performance on this correlation from the perspective of probability, thus realizing the process of selecting the climatic design conditions based on the requirement for indoor thermal environment risk level. Taking Guangzhou in China as an example, the new process of determining climatic design conditions is realized. On this basis, the difference between the traditional method and the present research method is compared. In the Chinese norm method, the indoor thermal environment risk level of the building is between 0 and 0.03% when the climatic design conditions are selected with 0.57% cumulative frequency of occurrence; in the research method, the indoor thermal environment risk level of the building is between 0.2% and 0.6% when the climatic design conditions are selected with 0.57% indoor thermal environment risk level and 100% confidence level. The results indicate that the research method can meet the designer's expectation for indoor thermal environment risk level in design more directly and accurately.

Keywords

• Air-conditioning system design
• Climatic design conditions
• Indoor thermal environment
• Risk level
• Building thermal performance