Traditionally, turbomachinery has been the domain of large devices and installations, characterized by installed power levels ranging from several megawatts upwards. Smaller devices are characterized by higher rotational speeds, which pose a technical challenge and set a number of new design and technological requirements. Thanks to the application of in-house solutions in the field of aerodynamics and structural mechanics, oil-free bearings, and the use of state-of-the-art power electronics and high-speed drives, we have been able to meet these challenges.
Our devices, unlike the most commonly used positive displacement machines, belong to the group of turbomachinery, which has tangible and positive effects on operational and economic characteristics. High rotational speeds of the rotors result in very high power density, small device sizes, and quiet and vibration-free operation.
In addition, an important feature of turbomachinery is their wide operating range, which results in excellent control properties, which, in the target systems, provide excellent efficiency at partial loads, i.e. in conditions in which these devices often operate most of the time (e.g., air-conditioning or heat pumps). Furthermore, due to the lack of components that rub against each other (as in a piston compressor) or roll over each other (in a screw compressor or scroll type), turbomachines are much more durable, have significantly less wear of working components, and are consequently cheaper to operate.
We design and deliver comprehensive solutions for high-speed centrifugal compressors and turbines for industrial applications in chillers, heat pumps, waste energy recovery, compression, and expansion of process gases.
The flow paths of our devices are designed based on our own computational methods developed in a series of R&D projects. In the design calculations, the working fluid is treated as a real gas, whose equation of state differs significantly in properties from an ideal gas (especially near the saturation line).
The rotors of our machines are supported on oil-free bearings, which use the working medium of the target system (e.g., hydrocarbons or refrigerants such as R134a, R1234ze, R1233zd, etc.) as the lubricating agent.
The casings of our machines are fully hermetic. The oil-free design ensures the purity of the working medium.
In the smallest devices, we use gas bearings, including compliant foil bearings. For larger compressor powers and heavier shafts, we are able to utilize lubrication with the working fluid in the liquid phase.
We are able to develop a high-speed turbomachine tailored to the user’s needs and imposed parameters (e.g., inlet steam pressure and temperature, outlet pressure, mass flow). We carry out the process of building a new machine comprehensively – from developing the design to manufacturing and conducting tests (unless the Client has different requirements).