VDI 4608 Blatt 2-2008 PDF

Scope: The aim of this guideline, which follows on from the definitions and examples provided in VDI 4608 Part 1, is to evaluate the efficiency of the combined generation or conversion of different target energies and to present different allocation methods, in conjunction with a recommendation for a scientifically based procedure. In practice total costs have until now frequently been apportioned to the target products by the remainder value method. The present guideline proposes a differentiated procedure for this: It is recommended that the exergy loss method [1 to 3] be applied for allocating the primary energy, emissions and variable costs to the target energies. As regards allocation of fixed costs, it is recommended, in the event that a straightforward assignment is not possible, that apportionment be based on the ratio of plant costs at the time of investment in the reference plants and supplying heat and power.

VDI 4608 Blatt 2-2008 Referenced Document

VDI 1000-2006 Richtlinienarbeit - Grundsaetze und Anleitungen
VDI 3986-2000 Determination of efficiencies of conventional power stations
VDI 4608 Blatt 1-2005 Energy systems - Combined heat and power - Terms, definitions, examples
VDI 4670 Blatt 1-2003 Thermodynamic properties of humid air and combustion gases

2008 VDI 4608 Blatt 2-2008 Energy systems - Combined heat and power - Allocation and evaluation
2006 VDI 4608 Blatt 2-2006 Energiesysteme - Kraft-Waerme-Kopplung - Allokation und Bewertung