Design and performance investigation of a thermal back-up system for hybrid drying
A major setback in the solar drying technique is the lack of solar energy during cloudy and rainy days as well as during the night. Thus, the hybrid solar – thermal drying techniques are feasible as a practical solution. This paper presents the design, fabrication, and test of a thermal back-up u...
Saved in:
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Book Section |
| Published: |
WIT Press
2013
|
| Subjects: | |
| Online Access: | http://eprints.utp.edu.my/11012/1/Tadahmun%20SC%20in%20WIT.pdf http://eprints.utp.edu.my/11012/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | A major setback in the solar drying technique is the lack of solar energy during cloudy and rainy days as well as during the night. Thus, the hybrid solar – thermal drying techniques are feasible as a practical solution.
This paper presents the design, fabrication, and test of a thermal back-up unit comprising a burner and a gas to gas heat exchanger. The test was accomplished with a feeding rate of 0.426 and 0.271 kg/hr of coal.
Results have shown that the temperature of the supplied hot air at the feeding rate of 0.426 kg/hr, was higher than the ambient temperature by 60ºC maximum, while it is 40ºC maximum with feeding rate of 0.271 kg/hr. The decrease in the feeding rate of coal leads to a stable hot air temperature for a long time of burning. The present thermal back-up unit is feasible for providing hot air suitable for the drying of any type of agriculture, forest, and food products.
The advantage of using such a system is important in the rural areas, where it operates and performs hybrid drying, free of electricity.
|
|---|