Performance analysis of solar-assisted chemical heat-pump dryer

Research output: Contribution to journalArticle

23 Citations (Scopus)

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 (COPh) 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.

Original languageEnglish
Pages (from-to)1920-1928
Number of pages9
JournalSolar Energy
Volume84
Issue number11
DOIs
Publication statusPublished - Nov 2010

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Pumps
Solar collectors
Gases
Experiments
Driers (materials)
Evaporators
Solar radiation
Drying
Hot Temperature

Keywords

  • Chemical heat pump
  • Coefficient of performance
  • Drying
  • Evacuated tubes collector efficiency
  • Solar fraction

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Performance analysis of solar-assisted chemical heat-pump dryer. / Fadhel, M. I.; Sopian, Kamaruzzaman; Wan Daud, Wan Ramli.

In: Solar Energy, Vol. 84, No. 11, 11.2010, p. 1920-1928.

Research output: Contribution to journalArticle

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AB - 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 (COPh) 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.

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