Exergoeconomic cost evaluations are based on the principle that costs are apportioned among mass and energy streams in proportion to the exergy that is carried by the Fuel and Product streams of the energy system components. The Specific Exergy Costing (SPECO) method was developed to find a general and unambiguous “process based” criterion to define the Fuel and Product of each component based on the record of all additions and removals of exergy to and from the mass and energy streams of the real energy system. This criterion in conjunction with the so called Fuel and Product Rules allows one to directly extract the exact number of auxiliary equations that are needed to evaluate costs. Several examples have been already shown in the last years to demonstrate the reduction of ambiguities in the Fuel and Product definitions and in turn in cost calculations deriving by the use of the SPECO approach. Other more specific examples of application to components having a “double purpose” are considered in this paper to compare the SPECO approach with other approaches, and to demonstrate the more reliable costs obtained by the former also in these cases.

Fuel and Product definitions in cost accounting evaluations: is it a solved problem?

LAZZARETTO, ANDREA
2013

Abstract

Exergoeconomic cost evaluations are based on the principle that costs are apportioned among mass and energy streams in proportion to the exergy that is carried by the Fuel and Product streams of the energy system components. The Specific Exergy Costing (SPECO) method was developed to find a general and unambiguous “process based” criterion to define the Fuel and Product of each component based on the record of all additions and removals of exergy to and from the mass and energy streams of the real energy system. This criterion in conjunction with the so called Fuel and Product Rules allows one to directly extract the exact number of auxiliary equations that are needed to evaluate costs. Several examples have been already shown in the last years to demonstrate the reduction of ambiguities in the Fuel and Product definitions and in turn in cost calculations deriving by the use of the SPECO approach. Other more specific examples of application to components having a “double purpose” are considered in this paper to compare the SPECO approach with other approaches, and to demonstrate the more reliable costs obtained by the former also in these cases.
2013
JETC 2013 Proceedings of the 12th Joint European Thermodynamics Conference
9788889252222
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2659276
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