Operational envelope and performance enhancement of a two-bed adsorption cooling system

Sai Yagnamurthy, Dibakar Rakshit, Sanjeev Jain, Bidyut Baran Saha

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

Along with the measures to improve the design of the adsorption cooling systems, the operating strategy selection plays an equally important role in their performance enhancement. Though several strategies such as heat recovery, mass recovery, multi-staging, etc., have been reported in the literature, their implementation in the more popular small-scale two-bed systems has not been given due attention. The present study highlights the performance enhancement of a two-bed single-stage silica gel-water adsorption cooling system through novel interventions in the operating cycle. A facility has been developed for testing a 10 kW water-cooled adsorption chiller. Passive heat recovery and two-stage operational strategies have been proposed for the enhancement of performance and operational envelopes through modifications in the chiller's valves sequencing. An improvement of 23–42% in coefficient of performance (COP) is observed with an optimized passive heat recovery strategy, while maintaining the water level in the hot water tank. Two kinds of two-stage operations viz., conventional two-stage and reheat two-stage, show potential for performance improvement under extreme conditions, resulting in an operational envelope enhancement up to 56%. A theoretical approach based on the thermodynamic analysis of adsorbent limits has been presented to assess the maximum desorption temperature limits.

本文言語英語
論文番号117181
ジャーナルApplied Thermal Engineering
195
DOI
出版ステータス出版済み - 8 2021

All Science Journal Classification (ASJC) codes

  • エネルギー工学および電力技術
  • 産業および生産工学

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