OPTIMIZATION AND INDOOR THERMAL ENVIRONMENT ANALYSIS OF WALL-ROOF COMBINED HEAT STORAGE VENTILATION STRUCTURE

Li Yong; Liu Qianru; Wang Dengjia; Chen Yaowen; Liu Yanfeng

doi:10.19912/j.0254-0096.tynxb.2020-0635

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (2) : 338-344. DOI: 10.19912/j.0254-0096.tynxb.2020-0635

OPTIMIZATION AND INDOOR THERMAL ENVIRONMENT ANALYSIS OF WALL-ROOF COMBINED HEAT STORAGE VENTILATION STRUCTURE

Li Yong^1,2, Liu Qianru^1,2, Wang Dengjia^1,2, Chen Yaowen^1,2, Liu Yanfeng^1,2

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Abstract

In view of the problems of the traditional glass curtain wall, such as large heat loss,temperature varying widely from day to night and large heating energy consumption, a wall-roof combined heat storage ventilation structure （WRHSV） is proposed. The heat transfer mathematical model of the new structure is established. The factors such as the inclination angle of the roof, the size of ventilation hole and the ventilation speed are optimized and analyzed. The indoor thermal environment and heat load of the room using WRHSV are compared with those using the traditional glass curtain wall. The results show that the total heat transfer and the convective heat transfer are both the largest when the dimension of the ventilation hole of WRHSV is 250 mm × 250 mm. When the slope angle of the roof and ventilation speed is 45°and 1.0 m/s, respectively, the heat supply capacity of WRHSV is the largest. Compared with the traditional glass curtain wall, the time for the room temperature maintaining above 15 ℃ is extended by 3.5 h, the temperature fluctuation is reduced by 3 ℃, the temperature difference between day and night is significantly reduced, and the heat load of the room is reduced by 40.7% when WRHSV is used.

Key words

passive solar energy / thermal performance / solar heating / numerical simulation / heat storage ventilation wall

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Li Yong, Liu Qianru, Wang Dengjia, Chen Yaowen, Liu Yanfeng. OPTIMIZATION AND INDOOR THERMAL ENVIRONMENT ANALYSIS OF WALL-ROOF COMBINED HEAT STORAGE VENTILATION STRUCTURE[J]. Acta Energiae Solaris Sinica. 2022, 43(2): 338-344 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0635

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