Determination of the average annual efficiency by adapted measurement procedure on CHP plants

Abstract

The paper presents the methodology for the determination of the average annual efficiency of CHP plants. The method is based on determining the effective efficiency on three different loads in order to obtain a functional dependence of the efficiency and unit load. For the calculation of the average annual efficiency, the annual load of the plant and the calculated functional dependence of the efficiency are taken into account. When calculating the effective efficiency, both methods, direct and indirect, were used. The methodology for determining the average annual efficiency of the CHP plant was implemented on the example of the cogeneration gas power plant "VELEBIT 3B" within the petroleum company NIS, Serbia. The presented methodology can be applied to similar plants for the determination of average annual efficiency.