PDF Publication Title:
Text from PDF Page: 009
for compliant devices such as scrolls in which a small quantity of liquid can be tolerated, or with high-speed devices such as turbines, in which the residence time of the fluid is shorter than the time required for condensation to occur (metastable condition). These results show that rectifier design is a crucial element for the success of a small scale combined cycle in the hydrogen production field in which high efficiency translates into greater liquid yield per unit energy input. Figure 5.6 Effect of trace amounts of water within in the expander inlet stream cycle cooling capacity Figure 5.7 Expander exhaust and dew point temperature at several water concentrations Scroll Expander Performance Study Scroll expander performance was measured for inlet pressures of 60, 70, and 80 psig; a range suitable for the 5kW combined cycle. Two tests were performed at each pressure to verify repeatability of the results. Tests at pressures over 80 psig were not feasible due to the relatively small tank and the inability of the compressor to supply compressed air at high flow rates (> 60 scfm). Figure 5.8 shows the results of the repeatability analysis applied to shaft power measurements at 65 psig. The second set of data indicated by the square points agrees well with the trend line of the initial data. beginning at a maximum value and decreasing monotonically with RPM as expected, the power output reaches a maximum at approximately 1500 RPM before decreasing toward zero in all three cases. This is thought to occur due to choked conditions at the expander exit. Flow becomes choked when the port to fitting area ratio is smaller than the critical area ratio given by the temperature and pressure of the exiting air. The area of the expander exit port and fitting is 0.375” and 0.25”, respectively. Further evidence of choked flow is given by the fact that the maximum attainable rotational speed is only 3000 RPM at source pressures up to 110 psig, whereas the TRS-90 scroll compressor can normally achieve speeds of up to 9000 RPM (Sanden engineer, personal conversation). Figure 5.8 Repeatability analysis applied to shaft power output at 65 psig A similar trend is witnessed with isentropic efficiency, ηe (Figure 5.9). Lowvalues of ηe are attributed to the poor volumetric efficiency, ηv, of the expander at low RPM and relatively high torsional load. Increased torsional resistance raises the pressure within each pocket of the scroll, enhancing tip leakage and reducing volumetric efficiency. Figure 5.10 illustrates the relationship between volumetric efficiency and rotational speed. At each pressure, ηv increases asymptotically toward a final value between 0.8 and 0.9. Figure 5.9 Scroll expander isentropic efficiency The volumetric efficiency indicates the percentage of air that passes through without doing any useful work. This process can be modeled as isenthalpic, with thePDF Image | Optimization of a Scroll Expander Applied to an Ammonia/Water Combined Cycle System for Hydrogen Production - Paper No. 1645
PDF Search Title:
Optimization of a Scroll Expander Applied to an Ammonia/Water Combined Cycle System for Hydrogen Production - Paper No. 1645Original File Name Searched:
ScrollExpander.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 (Standard Web Page)