Us200804657a1 oil scavenge system for a gas turbine. The modern large type steam turbine may have thousands of. The power turbine of the pgt16 gas turbine is identical to that of the pgt10 heavy duty, high efficiency gas turbine which has been in operation for more than half a million hours. The lubricant oil will form a protective film coating around the shaft only if it is sprayed at a pressure of 1. A main function of the oil system in turbine engines is cooling the bearings. Oil is drawn by a pump from the oil tank, and on completion of desired treatment, oil is returned to the oil tank. The thermodynamic process used in gas turbines is the brayton cycle. Steam turbine systems include various auxiliaries to ensure a workable, safe and reliable operation. Based on this gen eral information, this module covers the following topics. Pgt25 aeroderivative gas turbines the pgt25 gas turbine consists of an lm2500 ge aeroderivative gas.
Lubricating oil recommendations for gas turbines coast lubricants. The effort focused on the development of reasoning modules that utilize. Gas turbines are normally supplied with a lube oil package mounted in the bedplate of the turbine. The singleshaft system consists of one gas turbine, one steam turbine, one.
Small gas turbines chap 4 lubrication technical guide gas. This lube oil system is using a lube oil cooler to dissipate the heat of the lube oil that coming back from the. Turbine lube oil system monitoring and control using pic. The primary maintenance effort involves five basic systems. International air regulations require each engine to be equipped with a selfcontained oil system capable of providing continuous oil flow to the engine, under all conditions. They convert the chemical potential energy of the fuel to mechanical energy. Our comprehensive technical capabilities, unrivaled operations and maintenance support, and extensive global network help optimize system performance and reduce total cost of ownership in ways no. The gas turbine operates on an open cycle consisting of a compressor, a combustor, and a turbine combined in series figure 2. The topics presented should enhance the understanding of the principles that are reflected in performance maps for gas turbines, or, in other words, explain the operation principles of a gas turbine in industrial applications. Steam and gas turbines are so highly efficient and extremely reliable, its no surprise they. Turbine lube analysis programs oil analysis, oil sample. Gst ep premium performance industrial antiwear type steam and gas turbine oil. The lube oil treatment system is used to clean the oil circulating in the gas turbine lubrication and power oil system.
A typical lubricating oil system for this type of unit is illustrated in figure 5. Three centistoke turbine engine synthetic lubricating. Gas turbine gt lubricating oil lo and instrumentation air ia systems operation overview duration. Since solar turbines entered the industrial gas turbine business in 1960, the fleet of solar gas turbines installed worldwide has grown to more than,900 units and those turbines. Gas turbine engines use wet and drysump lubrication systems. Turbine oils have undergone several advancements as turbine oil specifications have been amended. The engine extracts chemical energy from fuel and converts it to mechanical energy using the gaseous energy of the working fluid air to drive the engine and propeller, which, in turn, propel the airplane. In the most common form, the exhaust gases from the gas turbine enter the heat recovery steamgenerating hrsg system, where the energy from the hot exhaust is used to heat the water to produce steam. Mobil dte 932 gt is designed for bearing lubrication and keepclean hydraulic servo valve performance. Emergency power generation sites also utilize simple cycle gas turbines.
Addressing gas turbine fuel flexibility than 50 years of fuel experience, ge has developed gas turbine technology that is proven and a more efficient alternative to other technologies, while burning the widest range of alternative gas and liquid fuel. Proper design and operation of the gas fuel heating system is critical to insure reliable operation of the gas turbine. Oil is drawn from the tank through a suction filter and into a pump that pressurizes it and then via a another fine filter the oil is fed to the engine. Jul 01, 2015 the design, fabrication and operation of such a heatrecovery system as an integrated part of the overall gas turbine package system. Linkediesinger 2010 an airoil separator also called a deaerator figure 9 is a component in a gas turbine lubrication system in which air is removed from scavenged oil before its return to the oil tank. Gst ep is designed primarily for use in industrial gas and steam turbines including those with reduction gear sets. Valentini gas turbine power plants 2 contents 1 first law of thermodynamics for an open system pag. Common oils used in these machines have a viscosity of 32 centistokes cst. Using gas fired, oil fired, or electric heaters for performance gas fuel heating will not result in a power plant thermal efficiency improvement.
Turbine lubricants must control the rust and corrosion that could destroy precision surfaces, resist foaming and air entrainment, which could impair lubrication. Turbine oils must now simultaneously meet the requirements of both steam and gas turbines. Modelbased diagnostics of gas turbine engine lubrication systems. The shell turbo gt, however, is the only one made to operate in high temperatures and in heavyduty gas turbines and turbocompressors and is also the only synthetic tier 4 oil. Fuel classification the potential fuels to be utilized on high efficiency gas turbines are very large, and in this changing energy landscape. The models execute in real time in the gas turbine. The successful operation of the gas turbine and its driven equipment is vitally dependent upon the lubrication system. These packages do not normally meet the type of standards. A gas turbine is an internal combustion engine, it can burn a variety of fuels which contributes to its great versatility. Oil supply a single oil supply line lubricates and cools the bearing, governs the mc and operates the hydraulic actuators and safety and protective devices. Usually, gas turbines under 5,000 hp are used at emergency power generation.
Since the shaft of the turbine are rotating in high speed the environment will be high in temperature. The gas turbine is used to provide shaft horsepower for oil and gas production and transmission. Gas turbines are a type of internal combustion ic engine in which burning of an airfuel mixture produces hot gases that spin a turbine to produce power. For the purpose of this course, the name turbine lubricating oil system has. Troubleshooting bearing and lube oil system problems thomas h. Standard practice for design of gas turbine generator. Jun 01, 2011 turbine lubricants must have excellent thermal and oxidation resistance at bearing oil temperatures that may approach 100oc in typical steam turbine or industrial heavyduty gas turbine and exceed 200oc in aeroderivative gas turbines. An oil scavenge system includes a scavenge pipe which extends forward into a relatively long and narrow compartment area of a rear bearing compartment of a gas turbine engine with aggressive core size constraints. The dry sump oil system is the most commonplace gas turbine oil system. The gas turbine engine has many different applications, each with different requirements, and therefore each with its own control equipment and system architecture.
O148 milprf7808 three centistoke turbine engine synthetic lubricating oil. Lube oil system, hydraulic oil system, torque converter, igv control animation. Solar designs and manufactures its gas turbines and turbomachinery packages under quality management systems, maintaining iso 9001 certification since 1992. The most common fuels for these machines are natural gas and distillate fuel oil.
Mccloskey manager, turbomachinery, generation group electric power research institute palo alto, california thomas h. The control system employs physicsbased models of gas turbine operability boundaries e. Lube oil pressure control, upsets and protective actions. Oil is stored in a separate oil tank or reservoir that is mounted close to or one the engine. The components of the gas turbine lube oil system gtlos and the steam. The combined cycle system includes singleshaft and multishaft con. The system for the aero gas generator uses an oil cooler to reject the heat removed from the engine to the atmosphere or to a glycolandwater cooling loop, which rejects the heat to atmosphere. Most critical lubricating point in a gas turbine engine is exhaust turbine bearing. Today, gas turbines are one of the most widelyused power generating technologies. Aircraft turbine engine lubrication systems aircraft systems. Gas turbine system an overview sciencedirect topics.
In some liquidfueled installations, the lubricating oil is cooled in a shellandtube heat exchanger by the incoming fuel. Tom mccloskey, is the man ager, turbomachinery, in the generation group at the electric power research insti tute ep rl in palo alto, california. It represents the normal oil consumption of the engine 0. Donaldson is a leading supplier of engineered air intake systems for gas turbines and industrial compressors, for both new and retrofit applications. Approval issue course 234 turbine and auxiliaries module 10 stressed that these consequences.
Some applications use synthetic lubricating oil due to its fireresistant property. Many industrial machines are delivered suitable to burn either gaseous fuel or liquid fuels. Fluid flow system of gas turbine free download as powerpoint presentation. Mobil dte 700 turbine oils, for example, meet or exceed 17 industry and equipment builder specifications for gas and steam turbines. Gas generator is derived from the f404 turbofan aircraft engine. A single lubricating system is usually used for heavyframe gas turbines and driven equipment using mineral oil. As in other process plant machinery trains, the quality of the lube oil system which is supplied with the train has a definite impact on the service factor of the unit. Thus, a liquid fuel system is frequently a part of the installation. The use of gas turbines for generating electricity dates back to 1939. Design and performance of a gasturbine engine from an. It can be used in several different modes in critical industries such as power generation, oil and gas, process plants. Turbine engines oil systems can classify as a pressure relief and the total loss system. Sgt600 lube oil system simulation university of twente student.
Fundamentals of gas turbine engines introduction the gas turbine is an internal combustion engine that uses air as the working fluid. The lube oil auxiliary system provides lubricating oil to the steam turbine bearings to ensure smooth rotation of the rotor and for. Small gas turbine engines spin at very high speed in the order of. The lube oil system in the sgt 600 has to supply oil of the correct pressure and temperature to the gas turbine bearings, the gear and the.
Ger3620n heavyduty gas turbine operating and maintenance. They differ in the physical sizes pressure and flow. The proposed system can capture co2, and be constructed on the basis of a combined cycle power generation system which consists of a gas turbine and a backpressure extraction turbine. A gas or steam turbine utilizes two types of hydraulic systems. The recirculatory oil system stores, carries, cools and distributes oil needed for lubricating and cooling every bearing, gear, spline and carbon seal, as well as certain. The lube oil systems purpose is to lubricate all the bearing in the turbine. Contaminated oil in the lubricating system of an engine can be disastrous to engine operation. The fueltopower efficiency of the engine is optimized by increasing the difference or ratio between the compressor discharge pressure and inlet air pressure. This paper focuses on steam turbine applications for oil and gas applications. Here the gas turbine is used to provide backup or emergency power to critical networks or equipment. Gas turbine systems donaldson filtration solutions.
The design, fabrication and operation of such a heatrecovery system as an integrated part of the overall gas turbine package system. O156 milprf23699 five centistoke turbine engine and gearbox oil. However, the basic principles and functions of a gas turbine control system are essentially the same for all applications. Complete gas turbine oil systems fall into two basic categories, a dry sump system and a. The gas turbine has become an important, widespread, and reliable device in the field of power generation, transportation and other applications.
937 369 83 335 1315 1549 434 338 1078 1130 1142 277 665 1091 178 363 284 128 1549 1449 468 653 1015 1227 563 1216 1106 1369 1156 1061 970 1311 296 670 603 137 1155 293 84 945 828 1370 428 719