Study On Verification And Optimization Of Space Performance Of Residential Solar Energy Utilization In Huangyuan,Qinghai Province
Qinghai Province,on the Qinghai-Tibet Plateau,experiences long and cold winters with significant daily temperature fluctuations.As such,all residential properties must have high thermal insulation performance.At the same time,Qinghai boasts abundant solar energy resources,with high annual sunshine duration and strong radiation intensity providing excellent conditions for the widespread application of passive solar design in dwellings.This study focuses on dwellings in Huangyuan County,Qinghai Province,which feature both modern characteristics and traditional aesthetics.Through field surveys and systematic data collection,the utilisation of passive solar energy in these dwellings was identified and its practical application was analysed.Based on the performance of solar energy spaces,horizontal sunshine rooms,vertical sunshine rooms,courtyard sunshine rooms,double-story walls,and buffer spaces were analysed.Using the simulation tool Design Builder,a typical dwelling case was modelled and validated,with a detailed performance analysis of the extracted spaces utilising solar energy.Based on the results,some optimisation strategies were proposed:(1)Integrate a horizontal sloping sunshine room into the building's roof.Simulation results indicate that incorporating an inclined sunspace(15 °)into residential roofs has the most significant impact on increasing indoor temperatures.The temperature can be raised by approximately 0.7 to 4.5 ° C within 24 hours.(2)Add a vertical sunshine room to the south side of the building.The depth of the sunshine room significantly affects both building energy consumption and indoor temperature.For linear-shaped and L-shaped buildings,increasing the depth of the sunshine room leads to a rise in the temperature of the main rooms,but also increases energy consumption.Therefore,the sunshine room depth should meet functional requirements,with a reasonable range of 1.5 to 2.4 meters.For U-shaped buildings,when the sunshine room aligns flush with the building to form a linear-shaped plane,the building's heat collection,storage and distribution capacities are optimised,resulting in a notable temperature increase in key functional rooms.Considering energy consumption and other factors,a sunshine room depth of 2.4 to 3 meters is more appropriate for U-shaped buildings.(3)Add a glass courtyard sunshine room to the courtyard.This enhances the thermal insulation of the dwelling,reducing heat loss at night,but also limiting heat gain during the day.Overall,it increases the temperature of the main rooms by approximately 0.1 to 0.4℃.(4)Use a double-story wall structure for the northern and eastern exterior walls.Simulations revealed that when double-story walls are applied on both the east and north sides of the building,the hourly temperature increase in each room becomes significant,with a rise of approximately 0.56 to 1.47℃.(5)Strategically arrange auxiliary rooms as buffer spaces.To address the heat demand of primary rooms,prioritise their placement in the order of bedroom＞living room＞kitchen and other auxiliary rooms.Position bedrooms on the southern side to directly benefit from solar radiation,while situating auxiliary rooms on the northern or eastern side of the main building to minimise heat loss from the bedrooms.Additionally,integrate the kitchen within the main building based on its spatial relationship with the main building.This allows primary functional areas,such as bedrooms and living rooms,to benefit from the kitchen's heat source,thereby improving indoor temperatures.Moreover,connecting the kitchen space with the main rooms through a vertical sunshine room can enhance the spatial quality of the dwelling.The horizontal sloping sunshine room in the roof space,the specifically shaped vertical sunshine room on the south side,the double-story wall structure and the auxiliary room as a buffer space together have a remarkable effect of increasing temperatures and saving energy,which are key means to improve the indoor physical environment of Huangyuan residential buildings in winter while also making full use of the solar energy resources of the plateau.Although the effect of the glass courtyard sunshine room is relatively small,its contribution to the insulation and improvement of the quality of the indoor space cannot be ignored and can be used to supplement the overall strategy.In the future,best practice should combine specific project features,used flexibly and in combination.This will allow the optimisation of the proposed strategies to achieve high efficiency,increased comfort and energy-saving goals for Huangyuan residential dwellings during the harsh winter season.
Huangyuan folk houses in Qinghai Provincesolar energy utilization spacepropertyverifyoptimize
万方数据
维普
