Physical and operating conditions effect on silica gel-water adsorption chiller performance

Research output: Contribution to journalArticle

Standard

Physical and operating conditions effect on silica gel-water adsorption chiller performance. / Al-Dadah, Raya; Rezk, ARM.

In: Applied Energy, Vol. 89, No. 1, 01.01.2012, p. 142-149.

Research output: Contribution to journalArticle

Harvard

APA

Vancouver

Author

Bibtex

@article{0701cb6ac6b7472fbbb3fa6805b191c5,
title = "Physical and operating conditions effect on silica gel-water adsorption chiller performance",
abstract = "Adsorption refrigeration systems are commercially developed due to the need of replacing the conventional systems which utilise environmentally harmful refrigerants and consume high grade electrical power. This paper presents the key equations necessary for developing a novel empirical lumped analytical simulation model for commercial 450 kW two-bed silica gel/water adsorption chiller incorporating mass and heat recovery schemes. The adsorption chiller governing equations were solved using MATLAB (R) platform integrated with REFPROP (R) to determine the working fluids thermo-physical properties. The simulation model predicted the chiller performance within acceptable tolerance and hence it was used as an evaluation and optimisation tool. The simulation model was used for investigating the effect of changing fin spacing on chiller performance where changing fin spacing from its design value to minimum permissible value increased chiller cooling capacity by 3.0% but decreased the COP by 2.3%. Furthermore, the effect of generation temperature lift on chiller performance and the feasibility of using it as a load control tool will be discussed. Genetic Algorithm optimisation tool was used to determine the optimum cycle time corresponding to maximum cooling capacity, where using the new cycle time increased the chiller cooling capacity by 8.3%. (C) 2010 Elsevier Ltd. All rights reserved.",
keywords = "Silica gel/water, Adsorption chiller, Empirical simulation",
author = "Raya Al-Dadah and ARM Rezk",
year = "2012",
month = jan
day = "1",
doi = "10.1016/j.apenergy.2010.11.021",
language = "English",
volume = "89",
pages = "142--149",
journal = "Applied Energy",
issn = "0306-2619",
publisher = "Elsevier",
number = "1",

}

RIS

TY - JOUR

T1 - Physical and operating conditions effect on silica gel-water adsorption chiller performance

AU - Al-Dadah, Raya

AU - Rezk, ARM

PY - 2012/1/1

Y1 - 2012/1/1

N2 - Adsorption refrigeration systems are commercially developed due to the need of replacing the conventional systems which utilise environmentally harmful refrigerants and consume high grade electrical power. This paper presents the key equations necessary for developing a novel empirical lumped analytical simulation model for commercial 450 kW two-bed silica gel/water adsorption chiller incorporating mass and heat recovery schemes. The adsorption chiller governing equations were solved using MATLAB (R) platform integrated with REFPROP (R) to determine the working fluids thermo-physical properties. The simulation model predicted the chiller performance within acceptable tolerance and hence it was used as an evaluation and optimisation tool. The simulation model was used for investigating the effect of changing fin spacing on chiller performance where changing fin spacing from its design value to minimum permissible value increased chiller cooling capacity by 3.0% but decreased the COP by 2.3%. Furthermore, the effect of generation temperature lift on chiller performance and the feasibility of using it as a load control tool will be discussed. Genetic Algorithm optimisation tool was used to determine the optimum cycle time corresponding to maximum cooling capacity, where using the new cycle time increased the chiller cooling capacity by 8.3%. (C) 2010 Elsevier Ltd. All rights reserved.

AB - Adsorption refrigeration systems are commercially developed due to the need of replacing the conventional systems which utilise environmentally harmful refrigerants and consume high grade electrical power. This paper presents the key equations necessary for developing a novel empirical lumped analytical simulation model for commercial 450 kW two-bed silica gel/water adsorption chiller incorporating mass and heat recovery schemes. The adsorption chiller governing equations were solved using MATLAB (R) platform integrated with REFPROP (R) to determine the working fluids thermo-physical properties. The simulation model predicted the chiller performance within acceptable tolerance and hence it was used as an evaluation and optimisation tool. The simulation model was used for investigating the effect of changing fin spacing on chiller performance where changing fin spacing from its design value to minimum permissible value increased chiller cooling capacity by 3.0% but decreased the COP by 2.3%. Furthermore, the effect of generation temperature lift on chiller performance and the feasibility of using it as a load control tool will be discussed. Genetic Algorithm optimisation tool was used to determine the optimum cycle time corresponding to maximum cooling capacity, where using the new cycle time increased the chiller cooling capacity by 8.3%. (C) 2010 Elsevier Ltd. All rights reserved.

KW - Silica gel/water

KW - Adsorption chiller

KW - Empirical simulation

U2 - 10.1016/j.apenergy.2010.11.021

DO - 10.1016/j.apenergy.2010.11.021

M3 - Article

VL - 89

SP - 142

EP - 149

JO - Applied Energy

JF - Applied Energy

SN - 0306-2619

IS - 1

ER -