Comparative exergoenvironmental analysis and assessment of various residential heating systems

Abstract This paper uses exergoenvironmental analysis to tackle the energetic, exergetic, and environmental performance of three heating systems commonly used in the residential building sector in Turkey: a conventional coal boiler, a condensing natural gas boiler, and a ground source heat pump. This analysis presents a combination of exergy analysis and life cycle assessment (LCA). The obtained results show that the ground source heat pump is an efficient heating system for the given application from a thermodynamic perspective in terms of the coefficient of performance and exergy efficiency with values of 2.5 and 10%, respectively. On the other hand, the LCA results demonstrate that the system-related environmental impact associated with ground source heat pump is the highest among the compared systems. Based on exergoenvironmental analysis the environmental impact per kWh exergy demand for each system is found to be 4.0, 1.69, and 1.93 mPt/kWh, respectively. This demonstrates that using an efficient system from thermodynamic perspective does not offer a significant environmental advantage and Turkey must renounce the use of coal in heating applications as soon as possible in order to get rid of environmental burdens as the first step and should promote the use of natural gas at building level in order to generate heating energy.

[1]  Liselotte Schebek,et al.  Exergoenvironmental analysis for evaluation of the environmental impact of energy conversion systems , 2009 .

[2]  Gerald Rebitzer,et al.  IMPACT 2002+: A new life cycle impact assessment methodology , 2003 .

[3]  Tatiana Morosuk,et al.  Exergoenvironmental analysis of a steam methane reforming process for hydrogen production , 2011 .

[4]  Hüsamettin Bulut,et al.  Bin weather data for Turkey , 2001 .

[5]  M. J. Moran,et al.  Thermal design and optimization , 1995 .

[6]  Li Nianping,et al.  Principles of exergy analysis in HVAC and evaluation of evaporative cooling schemes , 2002 .

[7]  Adisa Azapagic,et al.  Domestic heat pumps: Life cycle environmental impacts and potential implications for the UK , 2012 .

[8]  Hans-Jürgen Dr. Klüppel,et al.  The Revision of ISO Standards 14040-3 - ISO 14040: Environmental management – Life cycle assessment – Principles and framework - ISO 14044: Environmental management – Life cycle assessment – Requirements and guidelines , 2005 .

[9]  Ibrahim Dincer,et al.  Development of sustainable energy options for buildings in a sustainable society , 2011 .

[10]  Robert Ries,et al.  Life cycle assessment of residential heating and cooling systems in four regions in the United States , 2008 .

[11]  Abdullah Yildiz,et al.  Energy and exergy analyses of space heating in buildings , 2009 .

[12]  J. Segovia,et al.  Low-grade coal and biomass co-combustion on fluidized bed: exergy analysis. , 2006 .

[13]  Francesca Stazi,et al.  Life cycle assessment approach for the optimization of sustainable building envelopes: An application on solar wall systems , 2012 .

[14]  M. Tolga Balta.  Exergetic cost analysis and sustainability assessment of various low exergy heating systems , 2012 .

[15]  Arif Hepbasli,et al.  Evaluating a low exergy heating system from the power plant through the heat pump to the building envelope , 2008 .

[16]  Jan F. Kreider,et al.  Heating and Cooling of Buildings: Design for Efficiency , 1994 .