Passive Solar Systems Performance under Conditions in Bulgaria

    Research output: NRELTechnical Report


    This paper presents energy performance of 12 passive solar systems for three climatically different zones of Bulgaria. The results are compared with a base-case residential house that has a design typical for these areas. The different passive solar systems are compared on the basis of the percentage of solar savings and the yield, which is the annual net benefit of adding the passive solarsystem. The analyses are provided based on monthly meteorological data, and the method used for calculations is the Solar Load Ratio. Recommendations for Bulgarian conditions are given.
    Original languageAmerican English
    Number of pages5
    StatePublished - 1989

    Bibliographical note

    Prepared for the International Solar Energy Society Conference, Kobe, Japan, 4-8 September 1989

    NREL Publication Number

    • NREL/TP-254-3611


    • Bulgaria
    • residential solar
    • solar
    • solar energy
    • solar load ratio


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