Working Paper Article Version 1 This version is not peer-reviewed

Thermal Calculation and Experimental Investigation of Electric Heating and Solid Thermal Storage System

Version 1 : Received: 3 October 2020 / Approved: 5 October 2020 / Online: 5 October 2020 (10:53:24 CEST)

How to cite: Zhao, H.; Yan, N.; Xing, Z.; Chen, L.; Jiang, L. Thermal Calculation and Experimental Investigation of Electric Heating and Solid Thermal Storage System. Preprints 2020, 2020100064 Zhao, H.; Yan, N.; Xing, Z.; Chen, L.; Jiang, L. Thermal Calculation and Experimental Investigation of Electric Heating and Solid Thermal Storage System. Preprints 2020, 2020100064

Abstract

Electric heating and solid thermal storage system (EHSTSS) is widely used in district clean heating and the flexibility adjustment of combined heat and power (CHP) unit. It has been an effective way to absorb renewable energy. Aiming at the thermal design calculation and experimental verification of EHSTSS, the thermal calculation and the heat transfer characteristics of the EHSTSS are investigated in this paper. Firstly, a thermal calculation method for the EHSTSS is proposed in the paper. The calculation flow and calculation method for key parameters of heating system, heat storage system, heat exchange system and fan-circulating system in the EHSTSS are studied. Then, the instantaneous heat transfer characteristics of the thermal storage system (TSS) in the EHSTSS are analyzed, and the heat transfer process of ESS is simulated by FLUENT software. The uniform temperature distribution in the heat storage and release process of the TSS verifies the good heat transfer characteristics of the EHSTSS. Finally, EHSTSS test verification platform is built, and the historical operation data of the EHSTSS is analyzed. During the heating and release thermal process, the maximum temperature standard deviation of each temperature measurement point is 28.3℃ and 59℃respectively. The correctness of the thermal calculation of the EHSTSS is verified.

Subject Areas

solid sensible heat storage; thermal calculation; fluid-solid coupling; heat transfer characteristics; experimental investigation

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