Steady-state investigation of water vapor adsorption for thermally driven adsorption based greenhouse air-conditioning system

Muhammad Sultan, Takahiko Miyazaki, Bidyut Baran Saha, Shigeru Koyama

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In the present study, water vapor adsorption onto silica-gel, activated carbon powder (ACP) and activated carbon fiber (ACF) has been experimentally measured at 20, 30 and 50 °C using a volumetric method based adsorption measurement apparatus for greenhouse air-conditioning (AC). The Guggenheim-Anderson-De Boer and Dubinin-Astakhov adsorption models are used to fit the adsorption data of silica-gel and ACP/ACF, respectively. The isosteric heat of adsorption is determined by Clausius-Clapeyron relationship. The adsorbents are evaluated for low-temperature regeneration with aim to develop solar operated AC system for greenhouses. Ideal growth zone for agricultural products is determined by which the steady-state desiccant AC cycle is evaluated on the psychometric chart and adsorption isobars.Steady-state moisture cycled (MC SS ) by each adsorbent is determined for demand category-I, II and III which are based on 60%, 40% and 20% relative humidity of dehumidified air, respectively. In case of demand category-I, the ACP enables maximum MC SS at all regeneration temperatures (T reg ), ideally sitting at 47 °C. The ACF enables double MC SS as compared to silica-gel during demand category-II at T reg ≥59 °C. However, the silica-gel is found the only applicable adsorbent for the demand category-III.

Original languageEnglish
Pages (from-to)785-795
Number of pages11
JournalRenewable Energy
Volume86
DOIs
Publication statusPublished - Jan 1 2016

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Greenhouses
Air conditioning
Activated carbon
Water vapor
Silica gel
Adsorption
Adsorbents
Carbon fibers
Powders
Agricultural products
Atmospheric humidity
Moisture
Temperature
Air

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment

Cite this

Steady-state investigation of water vapor adsorption for thermally driven adsorption based greenhouse air-conditioning system. / Sultan, Muhammad; Miyazaki, Takahiko; Saha, Bidyut Baran; Koyama, Shigeru.

In: Renewable Energy, Vol. 86, 01.01.2016, p. 785-795.

Research output: Contribution to journalArticle

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