Prospects of Application of Dual-Fuel Combined Cycle Gas Turbine Units

Olesya Borush,Anna Zueva,Pavel Shchinnikov,F.-J Lin,K Suslov,N Voropai,C.-I Chen,P Komarnicki,A.M Foley,D Sidorov,A Kler,P Lombardi,Y Sun,R Lis

doi:10.1051/e3sconf/201911406002

Abstract

Dual-fuel combined cycle gas turbine units, including power units on the parallel scheme with predominant coal combustion are considered in the paper. The basic equations for determining the energy efficiency of dual-fuel combined-cycle power units are described. The interdependence of the efficiency of the gas turbine and steam turbine parts of the combined-cycle plant for the efficiency of the combined-cycle plant with a variable binary coefficient is presented. It is shown that 55-56% efficiency is achievable for parallel type combined cycle gas turbine units T with predominant solid fuel combustion on the basis of this interdependence between efficiency and binary coefficient. Comparison of competitiveness in the ratio of fuel prices for gas / coal with traditional coal technology and theoretical rejected combined cycle gas turbine units with an efficiency of 60% for dual-fuel combined cycle gas turbine units with the implementation of the Rankine cycle for subcritical (13 MPa) and supercritical (24 MPa) steam parameters is carried out. It is shown that the dual-fuel combined cycle gas turbine units are preferable to traditional coal steam turbine power units in the case when the ratio of the price of fuel does not exceed 5, binary rejected combined cycle gas turbine units, when the ratio of the prices by more 0,5.

Highlights

Analysis of the Russian energy sector over the past decade shows that the country's energy sector is characterized by a steady increase in capacity from 200 GW in 2007 [1,2,3] to 244 GW in 2017 [4]
The structure of the fuel balance of the regional energy sector has changed in the direction of increasing the share of gas (Fig. 2), in consequence of that cycle gas turbine units (CCGT) are much wider used in domestic energy [5]
The structure of the regional energy fuel balance over the past decade has changed in the direction of increasing the share of gas, with the largest scale of the gasification process of the territory provided in the far Eastern Federal district, where the share of gas increased from 5 to 39 %

Summary

Introduction

Analysis of the Russian energy sector over the past decade shows that the country's energy sector is characterized by a steady increase in capacity from 200 GW in 2007 [1,2,3] to 244 GW in 2017 [4]. The structure of the fuel balance of the regional energy sector has changed in the direction of increasing the share of gas (Fig. 2), in consequence of that CCGT are much wider used in domestic energy [5]. These settings allow you to engage the coal to combined-cycle technology and to ensure the most efficient from using this type of fuel

Method of evaluation of energy efficiency of dual fuel CCGT

Conclusions