Experimental study of the influence of collector height on the steady state performance of a passive solar air heater

Dylan Ryan, Stas Burek

    Research output: Contribution to journalArticle

    Abstract

    Passive solar air heaters, such as solar chimneys and Trombe Walls, rely on solar-induced buoyancy-driven (natural) convection to produce the flow of air. Although buoyancy-driven convection is well understood for a single vertical plate, buoyancy-driven convection in an asymmetrically-heated channel is more problematic, and in particular, the effects of the channel height on the flow rate and heat transfer. This paper reports on experiments on test rigs resembling lightweight passive solar air-heating collectors. The test rigs were of heights 0.5, 1.0 and 2.0 m, with adjustable channel depths (20–150 mm) and heat inputs (up to 1000 W/m2).

    Original languageEnglish
    Pages (from-to)1676-1684
    Number of pages9
    JournalSolar Energy
    Volume84
    Issue number9
    DOIs
    Publication statusPublished - 1 Sep 2010

    Keywords

    • energy systems
    • renewable energy
    • solar energy

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