The Effect of Nozzle Configuration on Adsorption-Chiller Performance

Wojciech Kalawa (), Karol Sztekler, Jakub Kozaczuk, Łukasz Mika, Ewelina Radomska, Wojciech Nowak and Andrzej Gołdasz
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Wojciech Kalawa: Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland
Karol Sztekler: Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland
Jakub Kozaczuk: JWA Polska, ul. Ks. I. J. Skorupki 11/1, 31-519 Krakow, Poland
Łukasz Mika: Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland
Ewelina Radomska: Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland
Wojciech Nowak: Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland
Andrzej Gołdasz: Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland

Energies, 2024, vol. 17, issue 5, 1-15

Abstract: Broadly defined climate protection is a powerful incentive in the search for environmentally friendly refrigeration technologies. Adsorption chillers are considered to be one such technology; however, their main disadvantages include a low cooling capacity, a low energy efficiency ratio (EER), and cyclic operation. Thus, a great deal of effort is being put into improving adsorption-chiller performance. In this paper, the influence of the spray angle, the number of nozzles, and the water flow rate through the nozzles on adsorption-chiller performance was investigated. Adsorption-chiller performance was investigated mainly in terms of the cooling capacity (CC), the energy efficiency ratio (EER), and the specific cooling power (SCP). The results indicated that the chiller’s cooling capacity increased from about 210 W to 316 W and that the EER increased from 0.110 to 0.167 when the spray angle of the nozzles was increased from 90° to 120°. It was also reported that increasing the flow rate of water through the nozzles did not improve the average cooling capacity or the other performance parameters but resulted in more stable operation of the chiller. Additionally, using six nozzles instead of three improved the average cooling capacity and EER tenfold.

Keywords: adsorption chiller; cooling capacity; energy efficiency ratio; evaporator; spray angle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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