Abstract
A detailed thermodynamic analysis of simple and regenerative cycles of adsorption refrigeration is presented. Two functions of the incoming and outgoing energy for the regenerative cycle using two isothermal adsorbers have been calculated in order to obtain the heated adsorber temperature at the end of heat recovery. Results are presented in terms of performances for the pair activated carbon AC-35 as adsorbent and methanol as adsorbate. These results demonstrated that the performance coefficient of double-bed adsorption refrigeration cycle increases with respect to the single-bed configuration. Several main factors affecting the performances of cycles are discussed according to the results of computer simulations.
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Abbreviations
- COP s , COP d :
-
Performance coefficient in single bed and double bed, respectively
- Cp ml , Cp mg :
-
Specific heat of the adsorbate in liquid and vapour state, respectively, J/kg k
- Cp a , Cp g :
-
Specific heat of the adsorbent and the metal of the adsorber, respectively, J/kg k
- L :
-
Latent heat of evaporation, KJ/kg
- m, m a , m g :
-
Adsorbed mass, mass of the adsorbent and metallic mass of the adsorber, respectively, kg
- m max, m min :
-
Adsorption mass at adsorbed and desorbed state, respectively, kg/kg
- T a , T g :
-
Adsorption and regenerating temperature, respectively, °C
- T c1, T c2 :
-
Limit temperature of desorption and adsorption, respectively, °C
- T r :
-
Heated adsorber temperature at the end of heat recovery, °C
- T e , T c :
-
Evaporation and condensation temperature, respectively, °C
- Q f , Q c :
-
Cooling power and total heat necessary for heating the adsorber, respectively, KJ/kg
- Q r :
-
Heat recovered, KJ/kg
- q st :
-
Isosteric heat of adsorption, KJ/kg
- r :
-
Heat recovery ratio
- ΔT r :
-
Two-adsorber temperature difference at the end of heat recovery, °C
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© 2015 Springer International Publishing Switzerland
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Chekirou, W., Boukheit, N., Karaali, A. (2015). Performance Improvement of Adsorption Cooling System by Heat Recovery Operation. In: Dincer, I., Colpan, C., Kizilkan, O., Ezan, M. (eds) Progress in Clean Energy, Volume 1. Springer, Cham. https://doi.org/10.1007/978-3-319-16709-1_7
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DOI: https://doi.org/10.1007/978-3-319-16709-1_7
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