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Analysis on exergy consumption patterns for space heating in Slovenian buildings

Author

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  • Dovjak, Mateja
  • Shukuya, Masanori
  • Olesen, Bjarne W.
  • Krainer, Ales

Abstract

Problem of high energy use for heating in Slovenian buildings is analyzed with exergy and energy analysis. Results of both are compared and discussed. Three cases of exterior building walls are located in three climatic zones in winter conditions. Results of energy analyses show that the highest heating energy demand appears in the case with less thermal insulation, especially in colder climate. If the comparison is made only on the energy supply and exergy supply, the results of exergy analysis are the same as those of energy analysis. The main difference appears, if the whole chain of supply and demand is taken into consideration. Exergy calculations enable us to analyze how much exergy is consumed in which part, from boiler to building envelope. They also reveal how much energy is supplied for the purpose of heating. Results show that insulation has much bigger effect than effect of boiler efficiency. However, the most effective solution is to improve building envelope together with boiler efficiency. Better thermal insulation also makes an important contribution to the improvement of thermal comfort conditions. It causes higher surface temperatures resulting in a larger warm radiant exergy emission rate and consequently better thermal comfort.

Suggested Citation

  • Dovjak, Mateja & Shukuya, Masanori & Olesen, Bjarne W. & Krainer, Ales, 2010. "Analysis on exergy consumption patterns for space heating in Slovenian buildings," Energy Policy, Elsevier, vol. 38(6), pages 2998-3007, June.
  • Handle: RePEc:eee:enepol:v:38:y:2010:i:6:p:2998-3007
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    Citations

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    Cited by:

    1. García Kerdan, Iván & Morillón Gálvez, David & Raslan, Rokia & Ruyssevelt, Paul, 2015. "Modelling the energy and exergy utilisation of the Mexican non-domestic sector: A study by climatic regions," Energy Policy, Elsevier, vol. 77(C), pages 191-206.
    2. Hepbasli, Arif, 2011. "A comparative investigation of various greenhouse heating options using exergy analysis method," Applied Energy, Elsevier, vol. 88(12), pages 4411-4423.
    3. repec:eee:appene:v:204:y:2017:i:c:p:31-46 is not listed on IDEAS
    4. Cansino, José M. & Pablo-Romero, María del P. & Román, Rocío & Yñiguez, Rocío, 2011. "Promoting renewable energy sources for heating and cooling in EU-27 countries," Energy Policy, Elsevier, vol. 39(6), pages 3803-3812, June.
    5. Lin, Hung-Wen & Hong, Tianzhen, 2013. "On variations of space-heating energy use in office buildings," Applied Energy, Elsevier, vol. 111(C), pages 515-528.
    6. Proskuryakova, L. & Kovalev, A., 2015. "Measuring energy efficiency: Is energy intensity a good evidence base?," Applied Energy, Elsevier, vol. 138(C), pages 450-459.

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