Energy Analysis and Modeling Study of Combined Activated Carbon-Silica Gel/Methanol Adsorption Ice Production System


Adsorption refrigeration machine
combined adsorption ice production (AIP) system
two different adsorbents (activated carbon and silica gel)
one adsorption reactor
thermal analysis

How to Cite

Ali M, Ajib S. Energy Analysis and Modeling Study of Combined Activated Carbon-Silica Gel/Methanol Adsorption Ice Production System. Glob. J. Energ. Technol. Res. Updat. [Internet]. 2016 Dec. 31 [cited 2022 May 21];3(1):1-22. Available from:


In this article, the transient modelling for a new construction of the Adsorption cold production was investigated. This system, named in this work the combined Adsorption Ice Production system (com-AIP system), was filled by both silica gel (SG) and activated carbon (AC) together in one adsorption reactor as the adsorbent and methanol as the adsorbate and refrigerant. A fined-tube heat exchanger was designed (named combined adsorption reactor) in order to contain two different adsorbents in the adsorption reactor and increase the heat transfer ability between the particles of adsorbents and heat exchanger fins. As a result the input energy required from the external heat source is saved and the coefficient of performance COP of the com-AIP system is improved. The mass flow rate of refrigerant increases and consequently, the refrigeration energy Qe rises too. A cycle simulation computer program of this innovative bed was developed to analyze the refrigeration energy and COP variations by varying heat transfer fluid (hot, cooling and chilled water) inlet temperatures and adsorption/desorption cycle time. The transient behavior of heat and mass transfer fluids has been also studied. Under the standard test conditions of 100 °C hot water, 24 °C cooling water, and 15 °C chilled water inlet temperatures, the simulation results showed that the amount of the ice produced per cycle of 5.34 kg and 0.73 COP can be achieved from the com-AIP system. It was found that the system performance is very much sensitive to the mass flow rate of the refrigerant. The cycle time of the system is not dependent on the amount of the adsorbents but is strongly dependent on driven temperature of heat exchange fluid and the design of the heat exchanger. The com- adsorption reactor allows using the advantages of physical properties of both adsorbents SG and AC. Consequently, this innovative com-AIP system utilizes effectively low-temperature heat sources of temperature between 65 and 100 °C, because of the inferior thermodynamic properties of methanol and the low regeneration temperature from silica gel and activated carbon as adsorbents. This strategy (com-AIP system) is completely different from the conventional adsorption reactors, which are filled with one adsorbent in one bed or in two beds.


Ahmad RMR. Theoretical and experimental investigation of silica gel-water adsorption refrigeration systems 2012.

Wang S. Hand book of air conditioning and refrigeration. 2nd Edition. McGraw-Hill Professional 2000.

Amir S and Majid B. Assessment of adsorber bed designs in waste-heat driven adsorption cooling system for vehicle air conditioning and refrigeration. Renewable and Sustainable Energy Reviews 2013; 30: 440-451.

Douss N and Meunier F. Experimental study of cascading adsorption cycles. Chemical Engineering Science 1989; 44(2): 225-235.

Gregg SJ and Sing KSW. Adsorption, surface area, and porosity. 2nd Edition. Academic Press 1982.

Chua HT, Ng KC, Malek A, Kashiwagi T, Akisawa A and Saha BB. Modeling the performance of two-bed silica Gelwater adsorption chillers. Int J Refrigeration 1999; 22: 194-204.

Chau HT, Ng KC, Malek A, Kashiwagi T, Akisawa A, Saha BB. Modeling the performance of two-bed, silica gel-water adsorption chillers. International Journal of Refrigeration 1999; 22: 194-204.

Boelman BC, Saha BB and Kashiwagi T. Experimental investigation of a silica gel-water adsorption refrigeration cycle the influence of operating conditions on cooling output and COP. ASHRAE Trans Res 1995; 101(2): 358-366.

Oertel K and Fischer M. Adsorption cooling system for cold storage using methanol/silicagel. Applied Thermal Engineering 1997; 18: 773-786.

Wang DC, Xia ZZ and Wu JY. Design and performance prediction of a novel zeolite–water adsorption air conditioner. Energy Conversion and Mangement 2006; 47: 590-610.

Critoph RE. Forced convection adsorption cycles. Applied Thermal Engineering 1998; 18: 799-807.

Anyanwu EE and Ezekwe CI. Design, construction and test run of a solid adsorption solar Refrigerator using activated carbon/methanol as adsorbent/adsorbate pair. Energy Convers Manage 2003; 44: 2879-2892.

Gong LX, Wang RZ, Xia ZZ and Lu ZS. Experimental study on an adsorption chiller employing lithium chloride in silica gel and methanol. International journal of refrigeration 2012; 35: 1950-1957.

Hu P, Yao JJ and Chen ZS. Analysis for composite zeolite/ foam aluminum-water mass recovery adsorption refrigeration system driven by engine exhaust heat. Energy Convers. Manage 2009; 50: 255-261.

Maggio G, Gordeeva LG, Freni A, Aristov, YuI, Santori G, Polonara F and Restuccia G. Simulation of a solid sorption ice-maker based on the novel composite sorbent (lithium chloride in silicagel pores). Appl Therm Eng 2012; 29: 1714-1720.

Wang LW, Wang RZ and Oliveira RG. A review on adsorption working pairs for refrigeration. Renew Sust Energy Rev 2009; 13(3): 518-534.

Srivastava NC and Eames IW. A review of adsorbents and adsorbates in solid-vapour adsorption heat pump systems. Applied Thermal Engineering 1998; 18: 707-714.

El-Sharkawy II. Study on adsorption of methanol onto carbon based adsorbents. International journal of refrigeration 2009; 32: 1579-1586.

Farrington R and Rugh J. Impact of vehicle air-conditioning on fuel economy, tailpipe emissions and electric vehicle range. In: Proceeding of the Earth Technologies Forum, Washington, DC 2009.

Hasan HZ. Energy analysis and performance evaluation of the adsorption refrigeration system 2013.

Hasan HZ, Mohamad AA, Al yousef Y and Al-Ansary HA. A review on the equation of state for the working pairs used in adsorption cooling systems. Renewable and Sustainable Energy Reviews 2015; 45: 600-608.

Glueckauf E. Formulation for diffusion into spheres and their applications to chromatography. Trans Faraday Soc 1955; 51: 1540-1551.

Sakoda A and Suzuki M. Fundamental study on solar powered adsorption cooling system. J Chem Eng Japan 1984; 17: 52.

Chua HT, Ng KC, Malek A, Kashiwage T, Akisawa A and Saha BB. Modeling the performance of two bed, silicagelwater adsorption chiller. International journal of refrigeration 1999; 22: 194-204.

Gnielinski V. New Equations for Heat and Mass Transfer in Turbulent Pipe and Channel Flow. Int Chem Eng 1976; 16: 359-368.

Robert D Goodwin. Methanol Thermodynamic Properties from 176 to 673 K at pressures to 70 bar 1987.

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