PDF Publication Title:
Text from PDF Page: 119
generator designs should consider the effect of steam pressure on the overall heat transfer area (and therefore cost) of the steam generator tubing. This cost is significant because, although busbar costs will be reduced as steam pressure and efficiency increase, the additional capital cost of a larger steam generator may be a outweigh any gains achieved through the improvement of efficiency. 5.7 Chapter Summary It is clear that the S-CO2 cycle has an efficiency benefit over the Rankine cycle in the temperature range considered here. The S-CO2 cycle achieves efficiencies about 1.0 % higher than the traditional Rankine cycle for comparably sized heat exchangers, either PCHE or Shell- and-tube. PCHEs suffer from higher intermediate and primary fluid pump work requirements, but are very compact. The intermediate loop pump work for all of these designs is small and the only pumping requirements that will be significant to overall efficiency are those of the primary pumps and that associated with intermediate piping pressure drops. The PCHE S-IHXs modeled here did not require the whole available space. In other words, the PCHE designs always approached a pinch point prior to the size reaching the maximum allowed dimensions. However, the heat transfer coefficients have not been thoroughly studied for PCHE geometries and improved PCHE codes should be developed to model them more accurately if more data become available. The limiting factor for most of the design options was the cycle choice, rather than the S-IHX. Consistent with Dostal’s findings [Dostal, 2004], the S-CO2 cycle is slightly better than the Rankine cycle above a turbine inlet temperature of about 485 oC. For the lowest turbine inlet temperatures achieved, the cycles’ efficiencies are within 0.15 % of each other. When heat exchanger options raise the turbine inlet temperature higher, however, the S-CO2 cycle efficiency exceeds that of the Rankine cycle. The highest efficiencies are achieved with a S-CO2 cycle coupled to a shell-and-tube heat exchanger linked to primary sodium in a loop-type design, i.e. there is no intermediate loop present. The CO2 shell-and-tube S-IHX must incorporate enhanced tubes, however, as smooth tubes do not provide the heat transfer coefficient required. Rankine cycles and S-CO2 recompression cycles perform comparably at a core outlet temperature below 510 oC. At 510 oC, the S-CO2 cycle and the supercritical water cycle achieve comparable efficiencies which are, on the whole, a slight improvement over the traditional Rankine cycle. Clear differences in cycle efficiency become evident if the core outlet temperature reaches 530 oC when the S-CO2 cycle has a clear efficiency advantage. Eliminating the intermediate loop is only practical for loop-type designs. Eliminating the intermediate loop, though effective in increasing efficiency, has safety implications, and there are other options for increasing efficiency almost as much without the safety issues. If the loop 119PDF Image | Supercritical Carbon Dioxide Cycle Analysis
PDF Search Title:
Supercritical Carbon Dioxide Cycle AnalysisOriginal File Name Searched:
547500498.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)