PDF Publication Title:
Text from PDF Page: 156
B Adaptation of a hermetic scroll compressor in expander mode Floating Seal The floating seal (Figure 97, 98 and 99) is used to by-pass the working fluid at the beginning of the compression. This system is designed to avoid overheating in the electrical motor at start-up. A bleed hole (Figure 98) is drilled in the stationary scroll, connecting the compression pockets to an intermediary piston chamber. At rest, the pressure in the piston chamber is equal to the exhaust pressure; the force equilibrium maintains the floating seal in its lower position and most of the fluid is by-passed. The compression then leads to a pressure increase in the piston chamber, the floating seal lifts up and the by-pass is closed. In expander mode, the pressure difference between inlet and outlet is low at start-up, leading to an over-expansion of the working fluid. The pressure in the bleed hold can therefore be lower than the exhaust pressure (Figure 100, left), which maintains the floating seal in its lower position, the by-pass remaining open. In order to address this issue and maintain the floating seal in its upper position, three springs are inserted in the piston chamber (Figure 100). The selection of the spring constant and of the spring length must be carefully performed: ➢ A too high spring constant/length leads to an increased pressure between both scrolls and excessive friction (due to the axial compliance mechanism). ➢ A too low spring constant/length does not ensure a correct sealing of the by-pass. In this work, the selected spring length is 9.5 mm for a chamber height of 9 mm. Spring constant was selected empirically by successive increases until reaching proper expander start-up conditions (i.e. without excessive by-pass). Figure 100: Left : Expansion profile corresponding to a bleed hole pressure inferior to the exhaust pressure. Right : Springs inserted underneath the floating seal in the piston chamber IXPDF Image | Organic Rankine Cycles for Waste Heat Recovery and Solar Uses
PDF Search Title:
Organic Rankine Cycles for Waste Heat Recovery and Solar UsesOriginal File Name Searched:
58881261.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |