Commenced in January 2007
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Exergetic and Sustainability Evaluation of a Building Heating System in Izmir, Turkey

Authors: Nurdan Yildirim, Arif Hepbasli

Abstract:

Heating, cooling and lighting appliances in buildings account for more than one third of the world’s primary energy demand. Therefore, main components of the building heating systems play an essential role in terms of energy consumption. In this context, efficient energy and exergy utilization in HVAC-R systems has been very essential, especially in developing energy policies towards increasing efficiencies. The main objective of the present study is to assess the performance of a family house with a volume of 326.7 m3 and a net floor area of 121 m2, located in the city of Izmir, Turkey in terms of energetic, exergetic and sustainability aspects. The indoor and exterior air temperatures are taken as 20°C and 1°C, respectively. In the analysis and assessment, various metrics (indices or indicators) such as exergetic efficiency, exergy flexibility ratio and sustainability index are utilized. Two heating options (Case 1: condensing boiler and Case 2: air heat pump) are considered for comparison purposes. The total heat loss rate of the family house is determined to be 3770.72 W. The overall energy efficiencies of the studied cases are calculated to be 49.4% for Case 1 and 54.7% for Case 2. The overall exergy efficiencies, the flexibility factor and the sustainability index of Cases 1 and 2 are computed to be around 3.3%, 0.17 and 1.034, respectively.

Keywords: Renewable Energy, Sustainability, Buildings, Exergy, Efficiency, Heating, low exergy

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1096333

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References:


[1] A. M. Omer, "Renewable building energy systems and passive human comfort solutions” Renewable and Sustainable Energy Reviews, 2008, 12, pp.1562-87.
[2] B. Kilkis, "Exergy aspects of operative temperature and it simplications on sustainable building performance. Raising Efficiency to New Levels, New Mexico”, ASHRAE Transactions, July, 2010.
[3] Ping Wang, Guangcai Gong, Ying Wang, Long Li, "Thermodynamic investigation of building integrated energy efficiency for building retrofit”, Energy and Buildings, 2014, 77, pp.139–148.
[4] A. Hepbasli. "Low exergy (LowEx) heating and cooling systems for sustainable buildings and societies”, Renewable and Sustainable Energy Reviews, 2012, 16,1, pp. 73–104.
[5] M.T. Balta, Y. Kalinci, A. Hepbasli. "Evaluating a low exergy heating system from the power plant through the heat pump to the building envelope”, Energy and Buildings, 2008, 40, pp. 1799–1804
[6] A. Hasan, J. Kurnitski, K. Jokiranta, "A combined low temperature water heating system consisting of radiators and floor heating”, Energy and Buildings, 2009, 41, pp. 470–479.
[7] C.T. Yucer, A. Hepbasli, "Thermodynamic analysis of a building using exergy analysis method”, Energy and Buildings, 2011, 43, pp. 536–542.
[8] Single family house project, http://www.muskon.com/253.htm
[9] T. Yilmaz, H. Bulut, "New Design Outside Temperature Values of Turkey”, Proceedings of V. National Sanitary Systems Engineering Congress and Exhibition, Izmir, Turkey, 2001, (in Turkish).
[10] TS 825, Turkish Standard, Heat Insulation Rules in Buildings, 1998.
[11] IEA, Low exergy heating and cooling of buildings–Annex 37.http://www.vtt.fi/rte/projects/annex37/Index.htm, 2008 (retrieved 19.05.08).
[12] D. Schmidt, "Design of low exergy buildings-method and a pre-design tool”, International Journal of Low Energy and Sustainable Buildings, 2003, 1–47.
[13] M.T. Balta, I. Dincer, A. Hepbasli, "Performance and sustainability assessment of energy options for building HVAC applications”, Energy and Buildings, 2010, 42, pp. 1320-1328.
[14] M.T. Balta, I. Dincer, A. Hepbasli, "Development of sustainable energy options for buildings in a sustainable society”, Sustainable Cities and Society, 201, 1, pp.72-80.
[15] M. T. Balta, "Exergetic cost analysis and sustainability assessment of various low exergy heating systems”, Energy and Buildings, 2012, 55 721-727.