Double-pass solar collectors with porous media suitable for higher-temperature solar-assisted drying systems

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14 Citations (Scopus)

Abstract

A high-performance solar collector suitable for a solar-assisted drying system was designed, fabricated, and tested. Solar-assisted drying systems consist of the solar collector array, auxiliary heater, drying chamber, and the air distribution systems. The solar collector was a double-pass solar collector and has upper and lower channels. The lower channel of the solar collector was filled up with porous media, which also acts as a storage medium. The outlet temperature and the performance of the system increased with the presence of the porous media. The collector width and length are 120 and 240 cm, respectively. The upper channel depth is 3.5 cm and the lower channel depth is 10.5 cm. The solar collector array consists of six solar collectors, arranged as two banks of three collectors in series. The collectors were joined in series using internal manifolding. A temperature of 90°C can be reached at a solar radiation level of 800 W m2, ambient temperature of 30°C, and mass flow rate of 0.06 kgs. The solar-assisted drying system was used for drying of oil palm fronds from moisture content of about 63% to moisture content of about 15%, for a drying time of about 7 h. The overall system efficiency is about 25%.

Original languageEnglish
Pages (from-to)13-18
Number of pages6
JournalJournal of Energy Engineering
Volume133
Issue number1
DOIs
Publication statusPublished - 2007

Fingerprint

Solar collectors
Porous materials
porous medium
Drying
Temperature
moisture content
Moisture
Palm oil
temperature
drying
solar collector
Solar radiation
distribution system
solar radiation
Flow rate
oil
air
Air

Keywords

  • Solar energy
  • Temperature
  • Thermal factors

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Civil and Structural Engineering

Cite this

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title = "Double-pass solar collectors with porous media suitable for higher-temperature solar-assisted drying systems",
abstract = "A high-performance solar collector suitable for a solar-assisted drying system was designed, fabricated, and tested. Solar-assisted drying systems consist of the solar collector array, auxiliary heater, drying chamber, and the air distribution systems. The solar collector was a double-pass solar collector and has upper and lower channels. The lower channel of the solar collector was filled up with porous media, which also acts as a storage medium. The outlet temperature and the performance of the system increased with the presence of the porous media. The collector width and length are 120 and 240 cm, respectively. The upper channel depth is 3.5 cm and the lower channel depth is 10.5 cm. The solar collector array consists of six solar collectors, arranged as two banks of three collectors in series. The collectors were joined in series using internal manifolding. A temperature of 90°C can be reached at a solar radiation level of 800 W m2, ambient temperature of 30°C, and mass flow rate of 0.06 kgs. The solar-assisted drying system was used for drying of oil palm fronds from moisture content of about 63{\%} to moisture content of about 15{\%}, for a drying time of about 7 h. The overall system efficiency is about 25{\%}.",
keywords = "Solar energy, Temperature, Thermal factors",
author = "Kamaruzzaman Sopian and Supranto and Othman, {Mohd. Yusof} and {Wan Daud}, {Wan Ramli} and Baharudin Yatim",
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AU - Sopian, Kamaruzzaman

AU - Supranto,

AU - Othman, Mohd. Yusof

AU - Wan Daud, Wan Ramli

AU - Yatim, Baharudin

PY - 2007

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N2 - A high-performance solar collector suitable for a solar-assisted drying system was designed, fabricated, and tested. Solar-assisted drying systems consist of the solar collector array, auxiliary heater, drying chamber, and the air distribution systems. The solar collector was a double-pass solar collector and has upper and lower channels. The lower channel of the solar collector was filled up with porous media, which also acts as a storage medium. The outlet temperature and the performance of the system increased with the presence of the porous media. The collector width and length are 120 and 240 cm, respectively. The upper channel depth is 3.5 cm and the lower channel depth is 10.5 cm. The solar collector array consists of six solar collectors, arranged as two banks of three collectors in series. The collectors were joined in series using internal manifolding. A temperature of 90°C can be reached at a solar radiation level of 800 W m2, ambient temperature of 30°C, and mass flow rate of 0.06 kgs. The solar-assisted drying system was used for drying of oil palm fronds from moisture content of about 63% to moisture content of about 15%, for a drying time of about 7 h. The overall system efficiency is about 25%.

AB - A high-performance solar collector suitable for a solar-assisted drying system was designed, fabricated, and tested. Solar-assisted drying systems consist of the solar collector array, auxiliary heater, drying chamber, and the air distribution systems. The solar collector was a double-pass solar collector and has upper and lower channels. The lower channel of the solar collector was filled up with porous media, which also acts as a storage medium. The outlet temperature and the performance of the system increased with the presence of the porous media. The collector width and length are 120 and 240 cm, respectively. The upper channel depth is 3.5 cm and the lower channel depth is 10.5 cm. The solar collector array consists of six solar collectors, arranged as two banks of three collectors in series. The collectors were joined in series using internal manifolding. A temperature of 90°C can be reached at a solar radiation level of 800 W m2, ambient temperature of 30°C, and mass flow rate of 0.06 kgs. The solar-assisted drying system was used for drying of oil palm fronds from moisture content of about 63% to moisture content of about 15%, for a drying time of about 7 h. The overall system efficiency is about 25%.

KW - Solar energy

KW - Temperature

KW - Thermal factors

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