Comparative Study of Thermodynamic Regulation Characteristics in a Dual-Tube Reactor with an External Heat Exchanger

Yong Bai, Yunfeng Ma (), Changjun Ke, Wang Cheng, Guangyan Guo, Peng Zhao, Can Cao, Lifen Liao, Xuebo Yang and Zhongwei Fan
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Yong Bai: Aerospace Information Research Institute, Chinese Academy of Sciences, No. 9 Deng Zhuang South Road, Beijing 100094, China
Yunfeng Ma: Aerospace Information Research Institute, Chinese Academy of Sciences, No. 9 Deng Zhuang South Road, Beijing 100094, China
Changjun Ke: Aerospace Information Research Institute, Chinese Academy of Sciences, No. 9 Deng Zhuang South Road, Beijing 100094, China
Wang Cheng: Aerospace Information Research Institute, Chinese Academy of Sciences, No. 9 Deng Zhuang South Road, Beijing 100094, China
Guangyan Guo: Aerospace Information Research Institute, Chinese Academy of Sciences, No. 9 Deng Zhuang South Road, Beijing 100094, China
Peng Zhao: Aerospace Information Research Institute, Chinese Academy of Sciences, No. 9 Deng Zhuang South Road, Beijing 100094, China
Can Cao: Aerospace Information Research Institute, Chinese Academy of Sciences, No. 9 Deng Zhuang South Road, Beijing 100094, China
Lifen Liao: Aerospace Information Research Institute, Chinese Academy of Sciences, No. 9 Deng Zhuang South Road, Beijing 100094, China
Xuebo Yang: Aerospace Information Research Institute, Chinese Academy of Sciences, No. 9 Deng Zhuang South Road, Beijing 100094, China
Zhongwei Fan: Aerospace Information Research Institute, Chinese Academy of Sciences, No. 9 Deng Zhuang South Road, Beijing 100094, China

Energies, 2022, vol. 15, issue 18, 1-18

Abstract: A special dual-tube reactor-dual fluidized bed reactor (DFBR), including an external heat exchanger (EHE) and a bypass, was designed to solve the problems that the waste heat of the hot fluid cannot be fully utilized and the reaction temperature cannot be accurately adjusted. Two connection schemes of DFBR and EHE with their thermodynamic equilibrium models and algorithms were proposed, and the optimal scheme was obtained by comparing the outlet temperature and thermal load. The results of the thermodynamic and operating characteristics of the optimal scheme showed that the hot fluid and the cold fluid had positive and negative effects on the heat transfer process, respectively. Increasing the cold fluid mass flow rate in the main stream can enhance the thermal load of the system and increasing the cold fluid mass flow rate in the bypass helped to increase the thermal load of DFBR, even exceeding that of EHE. Adding a bypass can adjust temperature precisely and increasing the inlet temperature can more effectively increase the adjustment range of the reaction zone temperature. The experimental results showed that introducing a bypass can significantly reduce the calculation deviation (12.8%), which decreased with the increasing temperature.

Keywords: bypass; dual fluidized bed reactor; external heat exchanger; numerical simulation; thermodynamic characteristics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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