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This work presents the experimental investigation results of high performance and low emission colorless combustion in a gas turbine tubular combustor at atmospheric conditions. Low emission and colorless oxidation reaction is characterized by dispersed flame and temperature under the conditions of preheated air. System performance, emissions of CO and UHC are recorded up to achieve low emission colorless combustion, the flame capturing, Measurements of temperature, inlet air mass flow rate and gas fuel LPG flow rate for variable of fuel main injector holes diameter. concluded that maximal air mass flow rate, with choked fuel flow in the main injector for each cases promotes the formation of colorless pal blue flame combustion, for 3.2 g/s of fuel flow rate with 6 holes and 1mm main injector holes diameter and lower CO emissions and decreasing in UHC emissions (70 → 10) ppmv with increasing in power generation (0.5 → 3.42) kW and decreasing in S.F.C. (21.5 → 3.49) kg/kwh.

Many technologies are used for engine development and testing but no technology has been successfully adopted for long term monitoring over the life of the engine. The challenge is to find a technology that is suitable for long term, high temperature operation but that can also provide accurate and reliable measurement. Blade turbine monitoring is an important area of work for improvements in gas turbine operation. Blade tip clearance measurements offer improvement in engine efficiency by enabling active clearance control. However, this is a difficult measurement because of the harsh turbine environment. The high temperature microwave sensor presented in this paper is one of the most promising candidates for clearance measurement. It has been tested on the high pressure stage of a 25MW gas turbine engine during different operating modes

يعلب الوقود الدور الرئيسي في تحديد أداء المحركات البحرية على السفن. العديد من الدراسات أشارت إلى إمكانية استخدام الغاز الطبيعي كوقود بديل عن الديزل في المحركات البحرية. و مع تزايد عدد ناقلات الغاز المسال عالميا و تنامي حمولتها في الفترة الأخيرة لتصل إلى 250 ألف متر مكعب حمولة صافية أعطى الفرصة لتزايد إمكانية استخدام الغاز الطبيعي على تلك السفن مستفيدا بنسبة التبخير التي تحدث في الشحنة أثناء الرحلة في توليد الطاقة. الورقة البحثية الحالية تحلل و تناقش المقارنة في أداء محركات التربينات الغازية البحرية عند استخدام الغاز الطبيعي. أوضحت الدراسة أن معدلات الأداء سجلت بعض التغييرات في حدود (-1.76% to +0.97%) عن تلك التي يحققها الوقود الأصلي كما بينت الدراسة إمكانية حدوث انخفاض في الاستهلاك النوعي للوقود بمقدار 13.5% عند نفس قيمة القدرة المعطاة و هو ما يعتبر عاملات مهما للدفع بتلك التكنولوجيا إلى الأمام و بخاصة في ظل تنامي المشاكل البيئية التي يسببها الوقود التقليدي. The marine fuel plays a key role in determining the performance of marine power plants onboard ships. Many studies have pointed to the possibility of using natural gas as an alternative fuel for marine power plants. The increase number of LNG carriers worldwide and the growing of its capacity in the last decades, this had given the opportunity to increase the possibility of using natural gas as a main fuel taking into account advantage of evaporation process which occurs during the voyage for energy generation. The current paper analyzes and discusses the change of the performance of marine gas turbine power plant when using natural gas as a main fuel. The study showed that the most significant parameters related to marine gas turbine performance had some (from -1.76% to +0.97%) of those achieved by diesel fuel. Concerning fuel consumption, the paper showed that the specific fuel consumption for natural gas is lower than that of diesel by about 13.5% at the same power output. This is an important factor to push this technology forward, particularly with growing environmental problems that are caused by the conventional marine fuel.

thermodynamic analysis of combined open- cycle- twin- shaft gas turbine (brayton cycle) and exhaust gas operated absorption refrigeration unit carry a significant amount of thermal energy that is usually expelled to the atmosphere without taking any further part in the power generation processes. The low grade thermal energy can however be put to beneficial use. This paper explores the utilisation of the exhaust gases of an open-cycle -twin -shaft gas turbine. An air standard cycle is assumed for the gas turbine, first with the aid of thermodynamics laws the specific net work and the efficiency of the cycle as a function of temperature ratio and pressure ratio of the cycle are calculated, and the realistic bounds placed on the cycle by the thermodynamic analysis is shown. Then the temperature of the exhaust gases and the heat that can be put into beneficial for precooling in terms of temperature ratio and pressure ratio of the cycle are determined. The specific net work and efficiency of a precooled cycle have been calculated and compared to the conventional systems. It has been concluded that the precooling has a marked effect on the specific net work and efficiency at low temperature ratio. Also without increasing the maximum cycle temperature the precooled cycle can work at a higher compressor pressure ratio and at higher temperature ratio.