1. Performance analysis of solar-assisted chemical heat-pump dryer
- Author
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Fadhel, M.I., Sopian, K., and Daud, W.R.W.
- Subjects
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HEAT pumps , *MICROFABRICATION , *PERFORMANCE , *SOLAR dryers , *SOLAR radiation simulation , *EVAPORATORS , *STORAGE tanks - Abstract
Abstract: A solar-assisted chemical heat-pump dryer has been designed, fabricated and tested. The performance of the system has been studied under the meteorological conditions of Malaysia. The system consists of four main components: solar collector (evacuated tubes type), storage tank, solid–gas chemical heat pump unit and dryer chamber. A solid–gas chemical heat pump unit consists of reactor, condenser and evaporator. The reaction used in this study (CaCl2–NH3). A simulation has been developed, and the predicted results are compared with those obtained from experiments. The maximum efficiency for evacuated tubes solar collector of 80% has been predicted against the maximum experiment of 74%. The maximum values of solar fraction from the simulation and experiment are 0.795 and 0.713, respectively, whereas the coefficient of performance of chemical heat pump (COP h ) maximum values 2.2 and 2 are obtained from simulation and experiments, respectively. The results show that any reduction of energy at condenser as a result of the decrease in solar radiation will decrease the coefficient of performance of chemical heat pump as well as decrease the efficiency of drying. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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