Modeling and computational simulation of adsorption based chemical heat pumps

Yurtsever, Ahmet Onur
Karakaş, Gürkan
Uludağ, Yusuf
In this study a methodology is developed for the design of a packed bed reactor to be used in a Chemical Heat Pump (CHP). Adsorption and desorption of ethanol on active carbon packing in the reactor are investigated. Depending on the cycle, i.e. adsorption or desorption, cooling or heating of the reactor material is modeled through transient energy equation. The parameters associated with the vapor-carbon adsorption kinetics are experimentally determined. Then spatial distribution of temperature and adsorbed vapor amount are obtained with respect to time in adsorption desorption cycles. These profiles are used to predict heating or cooling powers and COP for different adsorbent bed geometries and adsorption/desorption cycle times. Strong effect of heat transfer resistance of the packing, hence reactor size, on the system performance is observed.


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Güneş, Talha; Uludağ, Yusuf; Karakaş, Gürkan; Department of Chemical Engineering (2018)
Chemical heat pumps are valuable alternatives to conventional heat pumps when the aim is re-utilizing waste energy that is created from natural or industrial sources. In this study, kinetic data of an activated carbon – ethanol adsorption reactor is modeled and properly implemented into COMSOL Multiphysics software, and the geometry is modified for higher rate of heat transfer with the aim of gaining more performance from the system. On top of that, various cycle times are studied for gaining optimal coolin...
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Yurtsever, Ahmet Onur; Uludağ, Yusuf; Karakaş, Gürkan; Department of Chemical Engineering (2011)
Despite their limited commercial applications, chemical heat pumps (CHP) have been considered as an important alternative to conventional heating and cooling technologies. In this study, the adsorption-desorption of ethanol over activated carbon was applied on the CHP reactor. The ethanol vapor - activated carbon adsorption rate was determined at 30, 60, 90 and 120° experimentally by using Intelligent Gravimetric Analyzer C(IGA). The experimental adsorption data were used on the transient modeling of reacto...
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Citation Formats
A. O. Yurtsever, G. Karakaş, and Y. Uludağ, “Modeling and computational simulation of adsorption based chemical heat pumps,” APPLIED THERMAL ENGINEERING, pp. 401–407, 2013, Accessed: 00, 2020. [Online]. Available: