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Multi-Indicator Assessment of a Thermal Insulation Investment, Taking into Account the Pre-Set Temperature

Author

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  • Janusz Adamczyk

    (Institute of Economics and Finance, Faculty of Economics and Management, University of Zielona Góra, ul. Licealna 9, 65-417 Zielona Góra, Poland)

  • Robert Dylewski

    (Institute of Mathematics, Faculty of Mathematics, Computer Science and Econometrics, University of Zielona Góra, ul. Licealna 9, 65-417 Zielona Góra, Poland)

  • Marcin Relich

    (Institute of Management and Quality Sciences, Faculty of Economics and Management, University of Zielona Góra, ul. Licealna 9, 65-417 Zielona Góra, Poland)

Abstract

The article proposes indicators to evaluate a thermal insulation investment in a building, such as net present value ( NPV ), profitability index, discounted payback period, and ecological cost efficiency. Economic and ecological aspects were taken into account. Life Cycle Assessment (LCA) was used in the ecological analysis. The following heat sources in the building were considered: condensing gas boiler and heat pump. The developed indicators also depend on the pre-set temperature in residential premises. A methodology to determine the optimum thermal insulation thickness for both economic and ecological reasons was also proposed. A case study was analyzed, and a reference building, typical for Polish construction conditions, was used for research. Various solutions were suggested regarding the type of thermal insulation material and heat sources. The values of the indicators were determined for the proposed variants and for the economically and ecologically optimum thermal insulation thicknesses. Based on the conducted research, it was found that air temperatures maintained in the rooms of the building undergoing thermal modernization should be taken into account in the energy audit. The energy demand of the building for a room temperature of 26 °C is higher by 61% compared to the demand for the same building at the design temperature (20 °C). The innovation in the proposed approach to the economic and ecological assessment of a building is the combination of a wide range of temperatures potentially maintained in living spaces with ecological cost-effectiveness.

Suggested Citation

  • Janusz Adamczyk & Robert Dylewski & Marcin Relich, 2024. "Multi-Indicator Assessment of a Thermal Insulation Investment, Taking into Account the Pre-Set Temperature," Sustainability, MDPI, vol. 16(9), pages 1-16, April.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:9:p:3544-:d:1381545
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    References listed on IDEAS

    as
    1. Tomasz Smal & Joanna Wieprow, 2023. "Energy Security in the Context of Global Energy Crisis: Economic and Financial Conditions," Energies, MDPI, vol. 16(4), pages 1-12, February.
    2. Robert Dylewski & Janusz Adamczyk, 2023. "Economic and Ecological Optimization of Thermal Insulation Depending on the Pre-Set Temperature in a Dwelling," Energies, MDPI, vol. 16(10), pages 1-13, May.
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