Affiliations: [a] Hebei Energy Storage Heating Technology Innovation Center, Zhangjiakou, Hebei, China | [b] Hebei University of Architecture, Zhangjiakou, Hebei, China
Correspondence:
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Corresponding author: Hebei University of Architecture, Zhangjiakou, Hebei 075024, China. E-mail: wxfxf1978@126.com.
Abstract: An experimental and simulation study was carried out on the air supply system of the electric heating solid heat storage unit, aiming to improve the uniformity of the air supply system, thereby increasing the overall heating efficiency of the solid heat storage unit. The experiments show that non-uniform air distribution of the air system may cause non-uniform heat release of the heat accumulator, and the uniformity of the air supply system is greatly affected by the air supply structure and air inlet. By establishing a model of the heat storage device and conducting numerical simulation, the air distribution law of the air supply system was studied. According to the study results, the uniformity index of the air system was effectively improved by increasing the air cabin width and the air inlet angle, and adding a static pressure box at the air supply outlet, so that the flow velocity distribution of the air supply system was more uniform, which is of great significance to the overall optimization of the solid heat storage and heating system.
Keywords: Electric heating solid heat storage unit, flow velocity distribution uniformity index, experiments, numerical simulation
