Thermochemical Recuperation for Stirling Engines by Diesel Steam Reforming: Thermodynamic Analysis

  • LAN Jian ,
  • GUO Qianzhen ,
  • REN Zhe ,
  • LYU Tian ,
  • GU Genxiang ,
  • HAN Dong
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  • 1. Key Laboratory for Power Machinery and Engineering, Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Shanghai Marine Diesel Engine Research Institute, Shanghai 201108, China

网络出版日期: 2023-12-04

基金资助

This research work is supported by the Shanghai Rising-Star Program (Grant No. 21QB1403900) and the National Natural Science Foundation of China (Grant No. 52022058).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

Thermochemical Recuperation for Stirling Engines by Diesel Steam Reforming: Thermodynamic Analysis

  • LAN Jian ,
  • GUO Qianzhen ,
  • REN Zhe ,
  • LYU Tian ,
  • GU Genxiang ,
  • HAN Dong
Expand
  • 1. Key Laboratory for Power Machinery and Engineering, Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Shanghai Marine Diesel Engine Research Institute, Shanghai 201108, China

Online published: 2023-12-04

Supported by

This research work is supported by the Shanghai Rising-Star Program (Grant No. 21QB1403900) and the National Natural Science Foundation of China (Grant No. 52022058).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

摘要

热化学余热回收是改善斯特林发动机热力性能的一种前瞻性方式。我们基于Aspen HYSYS软件,针对带有热化学余热回收(TCR)重整器的斯特林发动机燃烧器建立仿真模型,开展TCR系统的性能计算,并改变重整温度、燃料分配率、水碳比(S/C)和重整压力以评估它们对重整过程和系统效率的影响。随着重整温度的提高,重整器中的燃料平衡转化率和热回收量逐渐增加。在温度为600℃,燃料分配比为40%时,燃烧器的效率达到最高。随着S/C从1增加到2.5,热回收率和燃烧效率明显增加。结果表明,燃料分配比和S/C的增加会导致重整温度下降,需要外部热量来满足蒸汽重整的热平衡。在给定的重整温度和S/C条件下,提高重整压力会导致燃料平衡转化率和重整反应热的减少。在5MPa重整压力和550℃重整温度条件下,斯特林发动机燃烧器的效率为92.7%,证明热化学余热回收系统可以应用于斯特林发动机的高压运行工况。

本文引用格式

LAN Jian , GUO Qianzhen , REN Zhe , LYU Tian , GU Genxiang , HAN Dong . Thermochemical Recuperation for Stirling Engines by Diesel Steam Reforming: Thermodynamic Analysis[J]. 热科学学报, 2022 , 31(6) : 2111 -2123 . DOI: 10.1007/s11630-022-1567-z

Abstract

Thermochemical exhaust heat recovery is a prospective way to improve the thermal performance of Stirling engines. Based on Aspen HYSYS software, the simulation model of a Stirling engine combustor with a thermochemical recuperation (TCR) reformer was established to calculate the performance of the TCR system. The reforming temperature, fuel distribution ratio, steam-to-carbon ratio (S/C), and reforming pressure were changed to evaluate their effects on the reforming process and system efficiency. With increased reforming temperature, the equilibrium fuel conversion rate and heat recovery amount in the reformer gradually increase. The maximum combustor efficiency is achieved at the temperature of 600°C and the fuel distribution ratio of 40%. With the S/C ratio increased from 1 to 2.5, the heat recovery rate and combustor efficiency increase significantly. The results show that the increase of fuel distribution ratio and S/C ratio leads to decreased reforming temperature, and external heat is needed to meet the heat balance for steam reforming. At a given reforming temperature and S/C ratio, increased reforming pressure results in decreased equilibrium fuel conversion rate and reforming reaction heat. At 5 MPa reforming pressure and 550°C reforming temperature, the efficiency of the Stirling engine combustor is 92.7%, proving that the thermochemical recovery system can be applied to the Stirling engine under high pressure conditions.

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