Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Performance simulation of underground seasonal solar energy storage in hot summer and cold winter zone in china
To analyze the performance of underground seasonal solar energy storage in hot summer and cold winter zones in China, a three-dimensional model for heat storage was developed. This model has been validated by the data from Tianjin’s experimental system and the relative error stayed below 5% during the process. A simulation was conducted to analyze thermal energy storage from March to October. Underground temperature distribution and the change in heat flux at each boundary were obtained. Three control strategies, that is, Normal, Double, and Interval were studied and compared. The effect of different heat storage start times/months for long-term heat storage was compared and discussed. The results show that the surface heat flux is significantly affected by the ambient temperature, while the bottom and sides of the heat storage area are primarily affected by the temperature of that area. The rise in the internal energy in March by Double-strategy and Interval-strategy are, respectively, 1.52 times and 1.12 times of that by Normal-strategy. For four months of heating storage, the average monthly heat storage efficiency is 80.70%, 81.34%, and 80.83% in Normal, Double, and Interval strategies, respectively. For long-term heat storage, an earlier start time/month lowers the efficiency of the system.
Performance simulation of underground seasonal solar energy storage in hot summer and cold winter zone in china
To analyze the performance of underground seasonal solar energy storage in hot summer and cold winter zones in China, a three-dimensional model for heat storage was developed. This model has been validated by the data from Tianjin’s experimental system and the relative error stayed below 5% during the process. A simulation was conducted to analyze thermal energy storage from March to October. Underground temperature distribution and the change in heat flux at each boundary were obtained. Three control strategies, that is, Normal, Double, and Interval were studied and compared. The effect of different heat storage start times/months for long-term heat storage was compared and discussed. The results show that the surface heat flux is significantly affected by the ambient temperature, while the bottom and sides of the heat storage area are primarily affected by the temperature of that area. The rise in the internal energy in March by Double-strategy and Interval-strategy are, respectively, 1.52 times and 1.12 times of that by Normal-strategy. For four months of heating storage, the average monthly heat storage efficiency is 80.70%, 81.34%, and 80.83% in Normal, Double, and Interval strategies, respectively. For long-term heat storage, an earlier start time/month lowers the efficiency of the system.
Performance simulation of underground seasonal solar energy storage in hot summer and cold winter zone in china
Li, Yong (Autor:in) / Chen, Xudong (Autor:in) / Ipposhi, Shigetoshi (Autor:in) / Nomura, Yasumitsu (Autor:in) / Wang, Ruzhu (Autor:in)
Science and Technology for the Built Environment ; 25 ; 925-934
09.08.2019
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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