Estimating exergy prices for energy carriers in heating systems : country analyses of exergy substitution with capital expenditures

Exergy represents the ability of an energy carrier to perform work and can be seen as a core indicator for measuring its quality. In this article we postulate that energy prices reflect the exergy content of the underlying energy carrier and that capital expenditures can substitute for exergy to some degree. We draw our line of argumentation from cost and technology data for heating systems of four European countries: Austria, Finland, The Netherlands, and Sweden. Firstly, this paper shows that the overall consumer costs for different heating options, widely installed in those countries, are in the same range. In this analysis we derived an overall standard deviation of about 8%. Secondly, additional analysis demonstrates that the share of capital costs on total heating cost increases with lower exergy input. Based on the data used in this analysis, we conclude that for the case of modern cost effective heating systems the substitution rate between exergy and capital is in the vicinity of 2/3. This means that by reducing the average specific exergy input of the applied energy carriers by one unit, the share of capital costs on the total costs increases by 2/3 of a unit.

[1]  Antonio Valero.  Exergy accounting: Capabilities and drawbacks , 2006 .

[2]  Göran Wall,et al.  EXERGY FLOWS IN INDUSTRIAL PROCESSES , 1988 .

[3]  Georgios Tsatsaronis,et al.  Exergoeconomic analysis and evaluation of energy-conversion plants—I. A new general methodology , 1985 .

[4]  William J. Wepfer,et al.  Exergy economics: I. Cost accounting applications , 1980 .

[5]  Adriana Angelotti,et al.  Exergy analysis of renewable energy-based climatisation systems for buildings: A critical view , 2009 .

[6]  Christos A. Frangopoulos,et al.  Thermo-economic functional analysis and optimization , 1987 .

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

[8]  Miguel A. Lozano,et al.  Theory of the exergetic cost , 1993 .

[9]  Ricardo Rivero Rodriguez,et al.  L'analyse d'exergie : application à la distillation diabatique et aux pompes à chaleur à absorption , 1993 .

[10]  Fridtjof Unander,et al.  Oil Crises and Climate Challenges: 30 Years of Energy Use in IEA Countries , 2004 .

[11]  Hjh Jos Brouwers,et al.  Evaluation of energy performance indicators and financial aspects of energy saving techniques in residential real estate , 2010 .

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

[13]  Xiao Feng,et al.  Application of the cumulative exergy approach to different air conditioning systems , 2010 .

[14]  Na Qin,et al.  Exergetic cost analysis of a space heating system , 2010 .

[15]  Alicia Valero,et al.  A prediction of the exergy loss of the world's mineral reserves in the 21st century , 2011 .

[16]  Juhani Heljo,et al.  Rakennusten energiankulutus ja CO2-ekv päästöt Suomessa , 2005 .

[17]  E. Sciubba.  Beyond thermoeconomics? The concept of Extended Exergy Accounting and its application to the analysis and design of thermal systems , 2001 .

[18]  Enrico Sciubba,et al.  Exergy and extended exergy accounting of very large complex systems with an application to the province of Siena, Italy. , 2008, Journal of environmental management.

[19]  Alan H. Sanstad,et al.  DISCOUNT RATES AND ENERGY EFFICIENCY , 1995 .

[20]  Göran Wall,et al.  Exergy - a useful concept within resource accounting , 1977 .

[21]  Sheng Li,et al.  Exergy cost analysis of a micro-trigeneration system based on the structural theory of thermoeconomics , 2008 .

[22]  Arif Hepbasli.  A study on estimating the energetic and exergetic prices of various residential energy sources , 2008 .