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Experimental investigation on the effect of the switchingfrequency on the performance of a thermal wave adsorption heat pump

Published online by Cambridge University Press:  04 December 2013

Mostafa Gad El-Rab ,
Mahmoud Khaled ,
Belal Dawoud  and
Emad Amer
Mostafa Gad El-Rab
Affiliation:
Energy and Thermo-Fluids Group ETF, School of Engineering, Lebanese International University LIU, 146404 Mazraa, Beirut, Lebanon Mechanical Power Engineering Department, Faculty of Engineering, El-Menoufiya University, Shebin El-Kom, Egypt
Mahmoud Khaled*
Affiliation:
Energy and Thermo-Fluids Group ETF, School of Engineering, Lebanese International University LIU, 146404 Mazraa, Beirut, Lebanon
Belal Dawoud
Affiliation:
R&D New Technologies, Viessmann Werke GmbH & Co KG, 35107 Allendorf/Eder, Germany
Emad Amer
Affiliation:
Mechanical Power Engineering Department, Faculty of Engineering, El-Menoufiya University, Shebin El-Kom, Egypt
*
a Corresponding author: [email protected]
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Abstract

In this paper, a two modular zeolite water adsorption heat pump (AHP) based on thethermal wave concept has been experimentally investigated. Each module composes of twoheat exchangers contained in a hermetic stainless steel vessel. The first heat exchangeris the adsorber/desorber located on the top of the vessel, while the second is theevaporator/condenser heat exchanger located on the bottom of the vessel. Throughout thiswork, the effect of the non-dimensional switching frequency, which has been introduced andtheoretically investigated by Alam et al. [Int. J. Heat Mass Transfer 43 (2000)4419–4431], on COP and the mean heating power of an adsorption heat pump has beenexperimentally investigated under one typical working condition of AHPs. The resultsshowed that the switching frequency and adsorber/desorber flow rate have strong influenceson both COP and the mean heating power. It has been also found that there is an optimumswitching frequency corresponding to each flow rate, at which the COP attains its maximumvalue. The obtained optimum switching frequencies vary slightly from 0.28 at an adsorberfluid flow rate of 0.6 l.min-1 to 0.32 at 1 l.min-1.

Keywords

Adsorptionheat pumpzeolite-waterswitching frequencythermal wave
Type
Research Article
Information
Mechanics & Industry , Volume 14 , Issue 5 , 2013 , pp. 383 - 387
Copyright
© AFM, EDP Sciences 2013

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References

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