Gas turbines are innately different from reciprocating engines. With only one or two rotating parts, there is not a lot of wear and tear. Turbines are used in mission-critical applications such as large power plants and aircraft because of this low maintenance and high availability.
In most applications, a gas turbine requires 10% the maintenance and 5x the MTBF versus traditional reciprocating diesel engines while delivering over 98% availability. Dynamo turbines development of technologies such as Any-Fuel™ and Any-Load™ were driven by the unique needs of the oil and gas industry.
Dynamo turbines are purpose-built for O&G. Just as a leaf blower engine should never be used to power an ESP, nuances in turbine design drive performance. Dynamo turbines are clean sheet designed for the oil and gas industry. Dynamo turbines are not based on aircraft auxiliary power units or ship engines, but rather an industrial turbine that is built to be robust and reliable.
Built for reliability. Dynamo turbines prioritize reliability over efficiency. Dynamo turbines run cooler than other turbines to prolong life and are larger to accommodate maintenance.
Among small gas turbines, Dynamo uniquely eschews recuperation devices. Recuperators are a type of heat exchanger used to improve thermodynamic efficiency. Unfortunately, it is also the single largest cause of catastrophic failure in small gas turbines. Furthermore, a recuperator would require compromises in the performance of both Any-Fuel™ and Any-Load™ technologies.
Cartridge Bearings. Dynamo turbines utilize ceramic ball bearings in a center cartridge to support rotating parts. The rolling element bearings provide rigidity and support to the rotating parts, at all speeds from 0 to over 100,000 RPM. These cartridges are easy to refurbish and replace.
Other turbines typically use fluid film bearings, which utilize a fluid such as air or oil to support the rotating parts. Although such systems perform well in baseload applications, they limit down-turn and wear out with every start and stop. Lastly, these types of bearings do not provide support while the equipment is off. As a result turbines with fluid film or foil bearings require more gentle rigging, transportation & installation. By contrast, Dynamo turbines can be installed in DOT trailers and towed across dirt right-of-way access roads like other portable equipment; alternatively, Dynamo turbines can be skid mounted for deployment from a standard tandem/bed truck.
Each Dynamo turbine is equipped with a remote terminal unit (RTU) that tracks performance and operating data and uploads the data to the cloud when data becomes available. Access to this data is a standard feature of buying a Dynamo. Customer data is securely isolated and encrypted as it travels through the cloud.
Customers can quickly see which turbines are operating and which turbines are offline. Dynamo uses proprietary algorithms to evaluate product performance and notify operators to preform preventive maintenance activities, such as filter changes when needed. Dynamo offers premium services which include remote control as well as predictive & proactive maintenance.
Although the performance monitoring can predict preventive maintenance needs, below is the expected schedule for major turbine components:
*For turbo-machinery and alternator exchanges please see the following section.
Dynamo sources its rotating components for its turbine from OEM market leaders. These OEMs build millions of turbo-machinery components a year, and the products are held to rigorous manufacturing and safety requirements. Dynamo works closely with these suppliers to ensure that the same level of performance, reliability, and safety transfers to the oilfield.
We stand behind our turbine with a market leading warranty:
- 3 Years or 20,000 hours on all rotating parts
- 1 Year or 8,000 hours on all other components
- 1 Complimentary gas turbine exchange before warranty expiration
- 30% credit for rotating parts returned* and exchanged
*At a minimum, the major housing components must be re-usable. Dynamo will determine the condition upon receiving the parts and has final say in the applicability of this program and is currently only available in North America.
Dynamo partners with leading finance companies in the marketplace to provide competitive rates across a large spectrum of financial needs to offer a variety of leasing and lease to-own programs for oil producers seeking reliable and flexible power. For pre-approval, please fill out this credit application.
Common financing options include:
- 24-month lease
- lease to own
- Power by the hour
Gas Turbine is similar to a reciprocating diesel engine. The components are different but they do the same thing – they complete a thermodynamic cycle.
Compression is the first step in any engine cycle. In reciprocating engines, this is achieved by having a piston compress air in a discrete chamber. This is called positive displacement compression, and reciprocating engines tend to compress the air with a ratio of 10:1.
Gas turbines also compress the air with what is appropriately called a compressor. Compression is not discrete but happens continuously. The rotating part of the compressor first accelerates air by pushing it along with the compressor blades. The air is accelerated to near the speed of sound. At this point, it has dynamic pressure which is related to its speed. Then the air is guided to a diffuser, where it is slowed down, and that dynamic pressure is converted to static pressure. To visualize this, think of multiple traffic lanes converging on a highway; as the traffic slows down and tries to fit in a smaller space, the car density goes up. Turbo-compressors are very efficient and can achieve a 3:1 compression ratio with 90% efficiency.
A compressor is shown as #1 the diagrams below. Now that the air is compressed, heat must be added.
Combustion is the second step in an engine cycle. In reciprocating engines, this occurs when the piston is near full compression (at top dead center), and fuke is injected, and combustion is catalyzed by either a spark (for a gasoline engine) or simply becasue the compressed air temperature is high enough to ignite fule (foe a diesel engine). Combustion and heat addition only lasts a millisecond or two.
Gas turbines utilize a large combustion chamber where combustion occurs. Although an igniter may be used to start the turbine initially, the flame burns continuously afterwards without any spark just like a gas oven. Turbines utilize a flame holder where fuel and air are brought together and where combustion occurs. The continuous combustion allows for greater flexibility and combustion control.
A combustor is shown as #2 the diagrams below. Now that the pressurized air is heated, the energy in that air must be extracted.
Expansion & Generation
Expansion & Generation is the third step in an engine cycle. In reciprocating engines, this is achieved by having a piston work in reverse with power being driven to the crankshaft and stored in a flywheel. From the crankshaft power can be driven to a generator; energy stored in the flywheel is used to start the compression stage.
Gas turbines also expand the air with what is appropriately called a turbo-expander. The expansion is not discrete but happens continuously. The hot pressurized air is accelerated through a nozzle converting static pressure back into dynamic pressure. The air then impinges upon and accelerates turbine blades.
In our turbines, a first turbo-expander is used to drive the compressor, while a second is used to drive an alternator. Turbo-expander are very efficient and can extract energy from the air with 85% thermodynamic efficiency.
For Dynamo products, a turbo-expander used to drive the compressor is shown as #3 in the diagrams below. A second turbo-expander is used to drive a high speed alternator and are shown as #4 & #5 respectively in the diagrams below. Now that the energy is extracted, the air is exhausted to the environment—the last step for any engine.