Performance evaluation and determination of minimum desorption temperature of a two-stage air cooled silica gel/water adsorption system

Sourav Mitra, Kyaw Thu, Bidyut Baran Saha, Pradip Dutta

    Research output: Contribution to journalArticlepeer-review

    23 Citations (Scopus)

    Abstract

    This paper presents an in-depth numerical and thermodynamic study of a two-stage, 2-bed silica gel/water adsorption system for simultaneous generation of cooling power and potable water. The system is air cooled where the ambient temperature remains constant at 36 °C. The first part of this paper investigates the effect of cycle time, chilled water inlet and heat source temperature on system performance viz. specific cooling capacity (SCC), specific daily water production (SDWP) and coefficient of performance (COP). A significant outcome of this study is to show that decrease in heat source temperature not only reduces the specific throughput but also increases the optimum cycle time, whereas COP is relatively insensitive to such alterations. The second part of this paper discusses the estimation of the minimum desorption temperature from the simulated system throughput results as well as from fundamental thermodynamic analysis of a two-stage adsorption cycle. This thermodynamic analysis provides a theoretical limit for minimum desorption temperature and optimal inter-stage pressure for a two-stage adsorption cycle.

    Original languageEnglish
    Pages (from-to)507-518
    Number of pages12
    JournalApplied Energy
    Volume206
    DOIs
    Publication statusPublished - 2017

    All Science Journal Classification (ASJC) codes

    • Building and Construction
    • Energy(all)
    • Mechanical Engineering
    • Management, Monitoring, Policy and Law

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