Analytical and experimental studies on the thermal efficiency of the double-pass solar air collector with finned absorber

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Abstract

Problem statement: The design of suitable air collectors is one of the most important factors controlling the economics of the solar drying. Air type collectors have two inherent disadvantages: Low thermal capacity of air and low absorber to air heat transfer coefficient. Different modifications are suggested and applied to improve the heat transfer coefficient between the absorber plate and air. These modifications include the use of extended heat transfer area, such as finned absorber. Approach: The efficiency of the solar collector has been examined by changing the solar radiation and the mass flow rate. An analytical and experimental study to investigate the effect of mass flow rate and solar radiation on thermal efficiency were conducted. The theoretical solution procedure of the energy equations uses a matrix inversion method and making some algebraic rearrangements. Results: The average error on calculating thermal efficiency was about 7%. The optimum efficiency, about 70% lies between the mass flow rates 0.07-0.08 kg sec-1. The thermal efficiencies increase with flow rate and it increase about 30% at mass flow rate of 0.04-0.08 kg sec-1. Conclusion: The efficiency is increased proportional to mass flow rate and solar radiation and. The efficiency of the collector is strongly dependent on the flow rate.

Original languageEnglish
Pages (from-to)716-723
Number of pages8
JournalAmerican Journal of Applied Sciences
Volume8
Issue number7
Publication statusPublished - 2011

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Flow rate
Air
Solar radiation
Heat transfer coefficients
Solar collectors
Hot Temperature
Specific heat
Drying
Heat transfer
Economics

Keywords

  • Double-pass solar air collector
  • Finned absorber
  • Thermal efficiency

ASJC Scopus subject areas

  • General

Cite this

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title = "Analytical and experimental studies on the thermal efficiency of the double-pass solar air collector with finned absorber",
abstract = "Problem statement: The design of suitable air collectors is one of the most important factors controlling the economics of the solar drying. Air type collectors have two inherent disadvantages: Low thermal capacity of air and low absorber to air heat transfer coefficient. Different modifications are suggested and applied to improve the heat transfer coefficient between the absorber plate and air. These modifications include the use of extended heat transfer area, such as finned absorber. Approach: The efficiency of the solar collector has been examined by changing the solar radiation and the mass flow rate. An analytical and experimental study to investigate the effect of mass flow rate and solar radiation on thermal efficiency were conducted. The theoretical solution procedure of the energy equations uses a matrix inversion method and making some algebraic rearrangements. Results: The average error on calculating thermal efficiency was about 7{\%}. The optimum efficiency, about 70{\%} lies between the mass flow rates 0.07-0.08 kg sec-1. The thermal efficiencies increase with flow rate and it increase about 30{\%} at mass flow rate of 0.04-0.08 kg sec-1. Conclusion: The efficiency is increased proportional to mass flow rate and solar radiation and. The efficiency of the collector is strongly dependent on the flow rate.",
keywords = "Double-pass solar air collector, Finned absorber, Thermal efficiency",
author = "Ahmad Fudholi and Kamaruzzaman Sopian and Ruslan, {Mohd Hafidz} and Othman, {Mohd. Yusof} and Muhammad Yahya",
year = "2011",
language = "English",
volume = "8",
pages = "716--723",
journal = "American Journal of Applied Sciences",
issn = "1546-9239",
publisher = "Science Publications",
number = "7",

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TY - JOUR

T1 - Analytical and experimental studies on the thermal efficiency of the double-pass solar air collector with finned absorber

AU - Fudholi, Ahmad

AU - Sopian, Kamaruzzaman

AU - Ruslan, Mohd Hafidz

AU - Othman, Mohd. Yusof

AU - Yahya, Muhammad

PY - 2011

Y1 - 2011

N2 - Problem statement: The design of suitable air collectors is one of the most important factors controlling the economics of the solar drying. Air type collectors have two inherent disadvantages: Low thermal capacity of air and low absorber to air heat transfer coefficient. Different modifications are suggested and applied to improve the heat transfer coefficient between the absorber plate and air. These modifications include the use of extended heat transfer area, such as finned absorber. Approach: The efficiency of the solar collector has been examined by changing the solar radiation and the mass flow rate. An analytical and experimental study to investigate the effect of mass flow rate and solar radiation on thermal efficiency were conducted. The theoretical solution procedure of the energy equations uses a matrix inversion method and making some algebraic rearrangements. Results: The average error on calculating thermal efficiency was about 7%. The optimum efficiency, about 70% lies between the mass flow rates 0.07-0.08 kg sec-1. The thermal efficiencies increase with flow rate and it increase about 30% at mass flow rate of 0.04-0.08 kg sec-1. Conclusion: The efficiency is increased proportional to mass flow rate and solar radiation and. The efficiency of the collector is strongly dependent on the flow rate.

AB - Problem statement: The design of suitable air collectors is one of the most important factors controlling the economics of the solar drying. Air type collectors have two inherent disadvantages: Low thermal capacity of air and low absorber to air heat transfer coefficient. Different modifications are suggested and applied to improve the heat transfer coefficient between the absorber plate and air. These modifications include the use of extended heat transfer area, such as finned absorber. Approach: The efficiency of the solar collector has been examined by changing the solar radiation and the mass flow rate. An analytical and experimental study to investigate the effect of mass flow rate and solar radiation on thermal efficiency were conducted. The theoretical solution procedure of the energy equations uses a matrix inversion method and making some algebraic rearrangements. Results: The average error on calculating thermal efficiency was about 7%. The optimum efficiency, about 70% lies between the mass flow rates 0.07-0.08 kg sec-1. The thermal efficiencies increase with flow rate and it increase about 30% at mass flow rate of 0.04-0.08 kg sec-1. Conclusion: The efficiency is increased proportional to mass flow rate and solar radiation and. The efficiency of the collector is strongly dependent on the flow rate.

KW - Double-pass solar air collector

KW - Finned absorber

KW - Thermal efficiency

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