Industrial Gas Turbine Operation Procedure Improvement by Dušan Gvozdenac * , Jovan Petrović, Branka Gvozdenac-Urošević In technical respect, cogeneration is well studied technology but it is sometimes not used in an optimum way in practice. Factors affecting operating economics of this technology in practice are very similar to other industrial technologies although the degree of their influence may vary. When cogeneration is concerned, the decisive importance lies on the parity between prices of electricity and driving fuel and reliability of concurrent utilization of generated heat and power. In this paper, a realistic case of real industrial cogeneration plant operations is analyzed in details and it is pointed out to the necessity of optimizing operations of the plant as a whole. Key Words: cogeneration, gas turbine, drying kiln 1. Introduction

Although numerous papers have dealt with cogeneration technologies, there are not many devoted to their practical applications. This paper analyzes in detail operations of a gas turbine which is an integral part of gypsum boards drying technology. However, the manner of using gas turbine in the drying process is rather different and may vary from 100% up to 0% of its utilization. This possibility, as well as the distinctive impact of frequently changing prices of energy carriers on the operating economics of the plant requires optimization of the plant’s operating regime. All advantages and disadvantages of cogeneration technologies are elaborated in details in [1-6] and without any doubts, it can be said that due to their higher energy efficiency these technologies definitely have future. However, it is obvious that cogeneration gives two ‘products’ whose relevance is mutually dependent. This dependence requires special analysis in practice since demand of heat and power may vary considerably. Parallel with the development of cogeneration technologies, it was necessary to develop accompanying regulations. The