sử dụng cho máy phát điện hơi nước phục hồi nhiệt trong công nghệ kết hợp chu kỳ. Lưu lượng khí thải và năng lượng là hai thông số quan trọng để xác định hiệu suất phục hồi nhiệt máy phát điện hơi nước chủ yếu là xác định các dữ liệu hiệu suất tua bin khí thành phần chính. Vì lý do này, | World Academy of Science Engineering and Technology 58 2009 Improvement of Gas Turbine Performance Test in Combine Cycle M. Khosravy-el-Hossani Q. Dorosti Abstract One of the important applications of gas turbines is their utilization for heat recovery steam generator in combine-cycle technology. Exhaust flow and energy are two key parameters for determining heat recovery steam generator performance which are mainly determined by the main gas turbine components performance data. For this reason a method was developed for determining the exhaust energy in the new edition of ASME PTC22. The result of this investigation shows that the method of standard has considerable error. Therefore in this paper a new method is presented for modifying of the performance calculation. The modified method is based on exhaust gas constituent analysis and combustion calculations. The case study presented here by two kind of General Electric gas turbine design data for validation of methodologies. The result shows that the modified method is more precise than the ASME PTC22 method. The exhaust flow calculation deviation from design data is by ASME PTC22 method so that the deviation regarding with modified method is . Based on precision of analyzer instruments the method can be suitable alternative for gas turbine standard performance test. In advance two methods are proposed based on known and unknown fuel in modified method procedure. The result of this paper shows that the difference between the two methods is below than . In according to reasonable result of the second procedure unknown fuel composition the method can be applied to performance evaluation of gas turbine so that the measuring cost and data gathering should be reduced. Keywords Gas turbine Performance test code Combined cycle. I. Introduction AS turbines have had a great role in electricity industry during the past four decades. Because of low primary investment cost gas turbines are used .
