Solar assisted heat-pump dryer and water heater
A solar-assisted heat-pump dryer and water heater has been designed, fabricated and tested. The performance of the system has been investigated under the meteorological conditions of Singapore. The system consists of a variable-speed reciprocating compressor, collector evaporator, storage tank, a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2003
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/22829/ http://irep.iium.edu.my/22829/4/hawlader1-s2.0-S0306261902001459-main.pdf |
| Summary: | A solar-assisted heat-pump dryer and water heater has been designed, fabricated and tested.
The performance of the system has been investigated under the meteorological conditions of
Singapore. The system consists of a variable-speed reciprocating compressor, collector evaporator,
storage tank, air-cooled condenser, auxiliary heater, blower, dryer, dehumidifier, and
air collector. The drying system is designed in such a way that some of the components can be
isolated depending on the weather conditions and usage pattern. The drying medium used is
air and the drying chamber is configured to carry out batch drying of food grains. A simulation
program is developed using Fortran language to evaluate the performance of the system
and the influence of different variables. The performance indices considered to evaluate
the performance of the system are: Solar Fraction (SF) and Coefficient of Performance (COP)
with and without water heater. The values of COP, obtained from the simulation and
experiment are 7.0, and 5.0, respectively, whereas the solar fraction (SF) values of 0.65 and
0.61 are obtained from simulation and experiment, respectively. |
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