jismart2023042: Local Sensitivity Analysis of Attached Sunspace for Residential Buildings in Cold Regions with High Solar Radiation

Abstract

Attached sunspace is an effective energy system for passive solar energy utilization and has been widely used in many countries. In this study, representative residential buildings with attached sunlight in highland areas were tested and analyzed. The thermal comfort of the buildings was evaluated. Sensitivity analyses and numerical simulations were performed to rank the effects of form, window-to-wall ratio (WWR), depth, glazing type, and interior walls on the comfort and energy consumption of the attached sunspace. A local sensitivity analysis was also performed for the more sensitive components and recommendations were made for the design of the attached sunspace in this area. The results show that. Built-in Sunspace have the best results in terms of improving building performance. Increase in WWR value increases the indoor thermal comfort of the building and reduces the heating energy consumption of the building. A sunspace depth of 600 mm resulted in the highest percentage of comfort hours and the lowest heating energy consumption. An increase in the heat transfer coefficient of the interior walls is beneficial for reducing the building heating energy consumption and improving the indoor thermal comfort, and the effect of changing the heat transfer coefficient on the building performance varies with different thermal storage coefficients.