La technologie Cryostar pour un monde plus propre brochure
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tow carbon technolosy for a cleaner world

Our mission Our mission To become a world leader of innovative solutions for financing by partnering, designing, installing & operating low carbon technologies in the power sector. We will incorporate life cycle strategic partnering to achieve operational efciency and economically effective programs Low-Carbon, Low-Cost Energy Cryostar - turbine experts for Lo-C energy generation Energy recovery Wasted heat (100°C-400°C) Cryostar Lo-C energy technology options Conventional bearing turbo generator Magnetic bearing turbo generator

Cryostar - turbine experts experts for Lo-C Cryostar—turbine for Lo-C energy generation Cryostar has been a world leader in radial inow turbine technology for more than 30 years and our superior product quality is recognised across the globe. Since 1986, we have used our expertise to provide energy recovery solutions, ensuring optimum recovery through highly efcient and economical operations. Our installed base comprises over 130 units and more than 60MW installed, including 20 machines on natural gas distribution networks. The natural gas installations have so far provided our customers...

Energy recovery Energy recovery As energy prices are continuously rising, the need for optimising energy usage and recovery is increasing rapidly. Governmental pressure on today’s corporations to become environmentally friendly and reduce carbon emissions to the bare minimum is putting additional emphasis on the importance of energy recovery. As the Cryostar technology merely recovers un-used energy this technology is CO2 emission free! The principle of energy recovery is turning unharnessed energy into electricity. The expansion of a working uid such as gas transfers kinetic energy into...

Here in Cryostar, over the last 20 years, we have been perfecting radial in-ow turbine to harvest wasted energy from a working uid into electricity. This is by the direct conversion (primary cycle) of kinetic or mechanical energy into electricity, such as with our Geo-pressure units, the same principle by which wind power operates. The Geo-pressure units work in parallel with pressure reduction valves on gas networks. Pressure reducing valves = Cryostar Lo-C Energy electricity generation The second method (binary cycle) is by converting low grade heat (100°C+) into a working uid, then...

Geo-pressure Geo-pressure Natural gas comes out of the ground at a very high pressure, called Geo-pressure. It is this pressure that moves the gas through the pipelines of the gas distribution system. However, the pressure is too high to be used safely by end-users of gas (power stations, industrial, commercial and domestic users). The pressure at the production platform is between 100-800 bar. In order for the gas to be suitable for domestic use it will have to be available at 1 bar (the pressure of the gas used by a cooker for example). At several points in the system, therefore, gas goes...

Geo-pressure Geo-pressure The amount of electricity that can be generated from a pressure reduction station depends on the required pressure drop and ow. Use the Cryostar Geo-pressure calculator to estimate the level of potential electricity generation. With all the thought and effort that has gone into the conception of this rst unique power station in Switzerland, we believe that all Cryostar’s objectives for reliability and service have been met. Especially to reach a 10 % higher power efciency than guaranteed in the contract. Mr. Kreyenbühl, GVM Geo-pressure to Electricity Calculator...

Geothermal Geothermal Imagine the huge energy potential which stays unexploited under our feet: only 0.1% of our globe is colder than 100°C. One Km³ of 200°C hot granite cooled by 20°C delivers about 10 MW of electric power for a period of 20 years. One km3 of 180°C hot geothermal water cooled to 100°C delivers about 7 MW of electric power for a period of 250 years Put in another way; installed 1 MW is enough to supply 2500 homes every year. Geothermal water has been used since the Roman time principally for bathing, but nowadays it is also a way to produce electricity even for low...

The Cryostar technology of high efcient radial inow turbine perfectly matches the needs of this application. Unlike axial turbines, the efciency of Cryostar’s expander can reach 90% or more ! Thanks to in-house developed tools, Cryostar engineers have the ability to optimise the process (mainly working uid and pressure level) and the expander to offer to the customer the optimum choice taking recovered power and cost into consideration. Evaporation Compression Pressure [bar(a)] Pressure [bar(a)] Condensation Expansion Coldwater_out Coldwater_In Generator Regenerator_Out Coldwater_out...

Wasted heat (100°C-400°C) Wasted heat (100°C-400°C) A waste heat binary plant is quite similar to a geothermal binary plant, hence the thermal energy is coming from an unexploited heat source (100°C—400°C typically) for example a thermal oil loop in an industrial plant, steel factory, cement factory, glass manufacturer etc. Thanks to a closed loop binary cycle, the selected uid mixture is expanded inside the Cryostar turbine to produce 1 to 12 MW of clean electricity. In order to estimate potential electricity recovery the following rule of thumb can be applied: Electrical Power[kW] = 0.5 x...

In a typical Organic Ranking Cycle (ORC) heat recovery system, the exhaust gas enters the evaporator where heat is transferred to the ORC working uid in a shell & tube heat exchanger or through an intermediate loop with thermal oil. The working uid leaves the evaporator as superheated vapor and enters the expander which starts rotating. Electricity is then produced by the expander’s shaft coupled to a generator. When the uid leaves the expander, its waste heat is recovered in the regenerator by preheating the incoming liquid. The ORC working uid then enters the condenser. The resulting...