Thermal performance study of a solar air heater with packed flow passage

Y. Demirel, Ş Kunç

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


A solar air heater with the air flow channel underneath the absorber plate has been designed and tested. The performance tests have been carried out when the flow channel is empty (type I) and packed with Raschig rings made of hard plastic (type II). The packing causes a considerable increase in the efficiency. The theoretical analysis of the systems has been performed using a heat transfer model based on the quasi-steady state condition. The energy balance equations of the systems with one and two glass covers have been solved explicitly for various design and operating variables. The agreement between the measured and predicted performances is satisfactory for the type I, while it is relatively poor for the type II.

Original languageEnglish (US)
Pages (from-to)317-325
Number of pages9
JournalEnergy Conversion and Management
Issue number3
StatePublished - 1987


  • Packed air flow channel
  • Solar air heater
  • Steady state

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology


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