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Author: search.filters.author.Bunjongjit, SuleeSubject: search.filters.subject.Economic analysis

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    Item type:Publication,
    Retrofitted existing residential building design in energy and economic aspect according to Thailand building energy code
    (2021-02-02)
    Ananwattanaporn, Santipont
    ;
    Patcharoen, Theerasak
    ;
    Bunjongjit, Sulee
    ;
    Ngaopitakkul, Atthapol
    Electrical energy usage in buildings is a challenging issue because many old buildings were not originally built to achieve energy efficiency. Thus, retrofitting old buildings to net-zero buildings can benefit both the owner and electric utilities. In this study, the BEC (building energy code) software was used to evaluate energy aspects of retrofitted buildings in compliance with Thailand’s building energy code to achieve a net-zero energy building. In addition, economic aspects were also studied to verify the feasibility for a project’s owner to invest in a retrofitted existing building. An existing residential building in Thailand was used as a case study. The results in terms of energy after retrofitting existing buildings into net-zero energy buildings show that the total energy consumption can be reduced by 49.36%. From an economic perspective, the investment cost for a retrofitted building can be compensated by energy saving in terms of discounted payback period (DPP) for approximately 4.36 years and has an IRR (internal rate of return) value of 19.23%. This result evidences the potential in both energy and economy for a project’s owner to invest in a retrofitted existing building in compliance with the building code, with potential for implementation with benefits on both electrical utilities and the project’s owner.
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    Item type:Publication,
    Solar water heating in residential building
    (2019-07-01)
    Chiradeja, Pathomthat
    ;
    Pothisarn, Chaichan
    ;
    Jettanasen, Chaiyan
    ;
    Yoomak, Suntiti
    ;
    Songsukthawan, Panapong
    The electrical consumption has been rapidly increased in the past few decades. However, environment concern and depleting of fossil fuel lead to raise of alternative energy. One of the applications for solar energy that has gain significant attention is solar thermal for watering heating that can replace electricity. This paper aims to presents feasibility on solar water heating for residential building in Thailand. The analysis has been done on both energy performance and economic perspective using RETscreen software and Bangkok, Thailand as case study location in order to verify the feasibility of solar water heating application in residential building. The result has shown the potential of solar water heating system application in residential building as a replacement to conventional electrical water heating.