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Research Papers

Silica Gel + Water Adsorber Chiller and Desalination System: A Transient Heat Transfer Study

[+] Author and Article Information
Sourav Mitra

Department of Mechanical Engineering,
Indian Institute of Science,
Bangalore 560012, India
e-mail: souravm@mecheng.iisc.ernet.in

Kandadai Srinivasan

Department of Mechanical Engineering,
Indian Institute of Science,
Bangalore 560012, India
e-mail: mecks@mecheng.iisc.ernet.in

Pramod Kumar

Department of Mechanical Engineering,
Indian Institute of Science,
Bangalore 560012, India
e-mail: pramod@mecheng.iisc.ernet.in

Pradip Dutta

Department of Mechanical Engineering,
Indian Institute of Science,
Bangalore 560012, India
e-mail: pradip@mecheng.iisc.ernet.in

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received July 31, 2014; final manuscript received October 31, 2015; published online January 20, 2016. Assoc. Editor: Sumanta Acharya.

J. Thermal Sci. Eng. Appl 8(2), 021014 (Jan 20, 2016) (8 pages) Paper No: TSEA-14-1177; doi: 10.1115/1.4032007 History: Received July 31, 2014; Revised October 31, 2015

The present work describes a silica gel + water adsorption-based desalination and chiller system, an emerging low cost process of integrating thermal desalination and cooling by utilizing low-grade heat. The cycle employs a combination of flash evaporation and thermal compression of steam in single/two stage to generate the dual effect. The current study aims at simulating a four-bed/stage adsorption system using energy and mass balance along with kinetics of adsorption. The performance of single- and two-stage adsorption systems is compared for ambient temperatures in the range of 25–45 °C and a constant heat source temperature of 85 °C.

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References

Figures

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Fig. 3

Temperature–time curve for (a) single-stage adsorption system and (b) two-stage adsorption system

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Fig. 2

Schematic of timing scheme

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Fig. 1

Schematic of adsorption system

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Fig. 4

Dühring chart for (a) single-stage adsorption system and (b) two-stage system

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Fig. 5

Variation of COP with half-cycle time and ambient temperature for (a) single-stage system and (b) two-stage system

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Fig. 6

Variation of SCC with half-cycle time and ambient temperature for (a) single-stage system and (b) two-stage system

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Fig. 7

Variation of SDWP with half-cycle time and ambient temperature for (a) single-stage system and (b) two-stage system

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