PDF Publication Title:
Text from PDF Page: 066
gas booster pump and the pump efficiency. The maximum Haskel pump inlet temperature is estimated to be 320 K, but could be substantially different depending on the amount of cooling provided to the housing and whether or not the rotor cavity is heated by magnetic losses. For the purposes of determining the Haskel pump pumping power, the pump inlet temperature is bounded by the lowest inlet temperature available which is 295 K (approximately the cooling water inlet T) and by our estimate for the highest temperature which is 320 K. The pump efficiency is estimated to be 85%. The pumping powers that were estimated for our design and scoping calculations, prior to operating the turbomachinery, are shown in the green row of Table 5.4. For a Haskel pump inlet temperatures of 320 K and for the largest leakage (choked flow conditions) and at an upstream pressure of 13,842 kPa, the pumping power was 12.24 kW. If the upstream pressure were 7,700 kPa, the pumping power would be 4.5 kW at 320 K and 4.3 kW at 295 K. To realize a pump inlet pressure of 295 K, the cavity leakage flow would have to be cooled by the water cooling system. We have also estimated the mass flow rates and pumping powers at the maximum up stream pressure of 13,842 kPa, but at elevated temperatures that vary from 325 K to 360 K. These results are illustrated in Figure 5-18. As just shown, there is considerable variation in the estimated leakage flow that varies from a low of 0.032 kg/s to a high value of 0.88 kg/s. The pumping power depends greatly on upstream pressure conditions, but also on the pump inlet temperatures. All of these values were unpredictable early in the program when the design decisions were made, hence the design was based largely on bounding estimates using the tools and correlations just described. This just points out the need to measure these leakage results, which was some of the very first test that was performed on the compression test-loop. In summary, the leak flow rates for this small scale proof-of-principle S-CO2 test loop are on the order of 1-2% of the total compressor mass flow rate per seal. However, because the pumping powers are relatively large (12 kW – 4 kW) there is a strong need to include features that reduce the pumping power such reducing the leakage flow rate by using better seals, or by pre-cooling the leakage flow prior to compressing it back into the loop. However, because of large uncertainties in the operating conditions the actual leakage rates need to be measured. It is also worth pointing out that this compression loop has only one compressor and one labyrinth seal. In later loops, the loops will have up to two compressors and two turbines with each wheel having a seal. Thus, measuring and understanding these loss mechanisms and developing good rules to scale these results to larger systems is important. Fortunately, based on our current understanding of the leakage flow for these designs, we expect that the fractional pumping power for large commercial systems to be much smaller than for this proof-of-principle test-loop, largely because more conventional sealing technologies can be used. Another reason is that in a larger system the generated power will grow as the radius squared, while the leakage flow rate grows proportional to the radius, thus it will be much easier to keep the fractional windage losses low in these larger systems. 66PDF Image | Operation and Analysis of a Supercritical CO2 Brayton Cycle
PDF Search Title:
Operation and Analysis of a Supercritical CO2 Brayton CycleOriginal File Name Searched:
100171.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)