9 Citations (Scopus)


A solar air heater (SAH) is a simple heater using solar radiation that is useful for drying or space heating. Unfortunately, heat transfer from the absorber plate to the air inside the solar air heater is low. Some researchers reported that obstacles are able to improve the heat transfer in a flat plate solar air collector and others found that a v-corrugated absorber plate gives better heat transfer than a flat plate. Yet, no work of combining these two findings is found. This paper describes the result of experimental study on a SAH with v-corrugated absorber plate and obstacles bent vertically started from 80° to 0° with interval 10° on its bottom plate. Experiments were conducted indoor at five different Reynolds numbers (1447 ≤ Re ≤ 7237) and three different radiation intensities (430, 573, and 716 W/m2). It is found that the obstacles improve SAH performance. Both the air temperature rise and efficiency increase with inserting obstacles bent at any angle vertically. Unfortunately, the air pressure drop is increasing, too. Obstacles bent vertically at smaller angle (means more straight) give higher air temperature rise and efficiency. However, the optimum angle is found 30°. The air temperature rise and efficiency will be 5.3% lower when the obstacles bent 30° instead of 0°, but the pressure drop will be 17.2% lower.

Original languageEnglish
Title of host publicationAdvances in Applied Mechanics and Materials
Number of pages7
Publication statusPublished - 2014
EventInternational Conference on Mechanical Engineering, ICOME 2013 - Mataram, Lombok, Indonesia
Duration: 19 Sept 201321 Sept 2013

Publication series

NameApplied Mechanics and Materials
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482


ConferenceInternational Conference on Mechanical Engineering, ICOME 2013
CityMataram, Lombok


  • Obstacle
  • Solar air heater
  • Solar collector
  • V-corrugated absorber plate


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