A new approach for exergoeconomic analysis of variable demand energy systems

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Abstract

Exergoeconomics is an attractive research field regarding the optimisation of design and operability wherecomplex energy systems are concerned. The different approaches to thermoeconomics can easily achieve optimalor near-optimal solutions for the design of energy systems in industrial applications, characterised by regularenergy demand profiles; for applications in buildings, however, the great number of components operating atunsteady conditions due to the demand variability make these methodologies hard to use. Furthermore, in projectphases of complex plants such as Combined Heat and Power (CHP) or Combined Heat Cooling and Power(CHCP), energy demand can be satisfied with different output shares among the various components. In this paper,a simplified exergo-economic methodology is presented, which is based on aggregate consumption data and on acase-oriented procedure for analysis simplification. A technique to internalise exergy flows between theconsidered energy system and other external systems is also introduced. The proposed approach was applied to atrigeneration plant serving a 300-bed hospital situated in a Mediterranean area; the obtained results were finallycompared with the optimal solution previously determined by means of demand cumulative curves and plantrunning simulations.
Lingua originaleEnglish
pagine (da-a)490-515
RivistaEnergy
Volume31 Issue 4
Stato di pubblicazionePublished - 2006

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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