PDF Publication Title:
Text from PDF Page: 164
As a key component, the expander deserves a particular attention. Its performance strongly depends on the thermodynamic properties of the fluid at its supply port, and mainly the vapor density. Figure 6.31 shows that the investigated expander yields an efficiency in the range of 60-70% when operating with pressure ratio between 3.5 and 9. Maximum efficiency seems to converge towards a value of pressure ratio of about 5. Concluding, with the present expander more than 30% of enthalpy input is lost. This loss is attributed to internal leakages, pressure drop at the expander supply port and mechanical losses. 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 HFE-7000 R- 123 R-245fa 0 1 2 3 4 5 6 7 8 9 10 11 Pressure Ratio [-] Figure 6.31 - Expander efficiency for different fluids 6.7. Conclusion The experimental study of a small ORC in heat recovery application with integrated scroll type expander is reported. The working fluid used is a hydrofluoroether HFE7000. Two series of tests were carried out to evaluate the performances of the system as well as those of the components. Maximum cycle global efficiency achieved was about 4% meaning that more that 96% of the heat available was not converted into mechanical power. The cycle maximum exergetic efficiency was only 13% due to excessive exergy losses in the heat exchangers. Although the expander yielded satisfactory results with a global isentropic efficiency above 60%, the pumps in contrary operated with very low efficiency (less than 17%) and should be substituted by more efficient ones. Comparison with previous tests was also carried out from which it could be concluded that 70% appears as the limit for the investigated expander and following fluids: R123, R345fa and HFE7000 in similar conditions give close results with slight advantage to R245fa for better efficiency, non-corrosiveness (unlike R123) and no infiltration problem (unlike R123 and HFE7000). Page | 163 Expander Efficiency [-]PDF Image | Low-Grade Heat Conversion into Power Using Small Scale Organic Rankine Cycles
PDF Search Title:
Low-Grade Heat Conversion into Power Using Small Scale Organic Rankine CyclesOriginal File Name Searched:
Tchanche_B.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 |