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Journal of Thermal Science

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2022 , Vol. 31 >Issue 2: 379 - 389

DOI: https://doi.org/10.1007/s11630-022-1535-7

工程热力学

Heat Recovery for Adsorption Refrigeration System via Pinch Technology

  • PAN Quanwen ,
  • SHAN He ,
  • TAMAINOT-TELTO Zacharie ,
  • WANG Ruzhu
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  • 1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Engineering Research Center of Solar Power and Refrigeration, MOE, Shanghai 200240, China
    3. School of Engineering, University of Warwick, Coventry CV4 7AL, UK

网络出版日期: 2023-11-30

基金资助

This work was supported by the National Natural Science Foundation of China (Grant No. 51906136), the Institute of Advanced Studies (IAS) of the University of Warwick in the UK (Grant No C5E3X56470T) and Shanghai Sailing Program (Grant No. 19YF1423100).

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Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022
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Heat Recovery for Adsorption Refrigeration System via Pinch Technology

  • PAN Quanwen ,
  • SHAN He ,
  • TAMAINOT-TELTO Zacharie ,
  • WANG Ruzhu
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  • 1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Engineering Research Center of Solar Power and Refrigeration, MOE, Shanghai 200240, China
    3. School of Engineering, University of Warwick, Coventry CV4 7AL, UK

Online published: 2023-11-30

Supported by

This work was supported by the National Natural Science Foundation of China (Grant No. 51906136), the Institute of Advanced Studies (IAS) of the University of Warwick in the UK (Grant No C5E3X56470T) and Shanghai Sailing Program (Grant No. 19YF1423100).

Copyright

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

吸附式制冷系统采用低品位热能驱动和天然制冷剂，具备节能环保的优势。然而，它存在效率低和成本高的缺点。吸附式制冷系统内部热量回收是提升其制冷效率（COP）的关键。基于夹点法的分析方法有助于实现系统最优的回热方式。本文建立了吸附式制冷系统的温度-热量图和问题表并进行了夹点分析。结果表明：1）夹点位于吸附床之间，即主要回热集中于吸附床之间；2）系统的动态特性（时间因素）是回热的最大制约；3）夹点温差对系统COP的影响不显著。当驱动热源温度为90℃时，硅胶-水吸附式制冷系统经过优化回热后的COP为0.73，接近于溴化锂-水吸收式制冷系统的COP。本文采用的夹点法可适用于不同类型的吸附式制冷系统（两床型、四床型、回质型等）。

关键词： heat recovery; adsorption refrigeration; pinch point; pinch technology; silica gel-water

本文引用格式

PAN Quanwen , SHAN He , TAMAINOT-TELTO Zacharie , WANG Ruzhu . Heat Recovery for Adsorption Refrigeration System via Pinch Technology[J]. 热科学学报, 2022 , 31(2) : 379 -389 . DOI: 10.1007/s11630-022-1535-7

Abstract

An adsorption refrigeration system can be driven by low grade heat and uses natural refrigerant with the advantage of reducing the greenhouse gases emission. However, one of the weaknesses is its low efficiency and more importantly its high cost. The recovery of internal waste heat becomes therefore very important in order to improve the coefficient of performance (COP). Analysis based on pinch technology can be helpful to optimal heat recovery operation. In this paper, temperature-heat diagrams and problem tables for adsorption refrigeration systems are proposed and analyzed using Pinch Technology. The results show that pinch point is located between beds and the main waste heat needs to be recovered between beds. Dynamic characteristic (time factor) of adsorption refrigeration system is the main resistance for heat recovery. The effect of pinch point temperature difference on the system COP is not distinct. Furthermore, when the driving temperature is 90°C, the COP of adsorption refrigeration via optimization of pinch analysis is 0.73 which is fairly comparable to LiBr-water absorption refrigeration system. Pinch Technology can be adopted in different types of adsorption refrigeration systems (two-bed, four-bed, mass recovery, et al.).

Key words： heat recovery; adsorption refrigeration; pinch point; pinch technology; silica gel-water

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