Method of simultaneous equations of material and energy balances when calculating actual data of thermal efficiency of gas turbine plants

Abstract

Reconciliation of material and energy balances according to data received from systems of technical and commercial record keeping is a mandatory step to calculate thermal efficiency indicators of thermal power plant (TPP) equipment. At the same time, the methodology to draw the balance is not regulated by regulatory documents for gas turbine plants. Appropriate approaches to solve the issue under consideration have not been worked out. There is no data on the impact of the balancing on the results of calculating the actual values of the gross efficiency of gas turbine plants. Thus, it is relevant to develop a methodology of simultaneous equations of the material and energy balances of gas turbine plants. The problem of simultaneous equations of the material and energy balances of a gas turbine plant in a scalar value is formulated within the framework of the concept of solving ill-posed problems based on Tikhonov's regularization. The concept allows one to obtain an analytical solution. When conducting calculations, data from the automated process control system of the operated GTX-100 gas turbine plant have been used. The method of simultaneous equations of the material and energy balances when calculating the actual indicators of the thermal efficiency of gas turbine plants is proposed. The influence of the balancing procedure on the results of calculating the actual values of the thermal efficiency indicators of a gas turbine plant is shown. The authors have determined the maximum deviations of the actual gross efficiency values when adjusting the results of measuring the controlled parameters using the example of GTX-100 gas turbine plant. The developed technique makes it possible to consider the maximum allowable total discrepancy between mass and energy balances, as well as the maximum deviation of the parameter values adjusted according to the balancing results, due to the standardized metrological characteristics of measuring instruments.