PDF Publication Title:
Text from PDF Page: 020
4. Cycle Operating Conditions In this chapter, the cycle operating conditions – temperatures and pressures – are varied to determine the conditions that provide the highest cycle efficiency. Previously, the reference cycle conditions (Figure 2) were selected such that the minimum pressure and temperature were set close to but still above the critical point. The maximum pressure was selected as 20 MPa based on the fact that beyond this pressure, the gain in cycle efficiency diminishes [4]. However, previous analysis has never been applied to the “low” temperature S-CO2 cycle design for a SFR. The selection of the operating parameters is revisited in this chapter. In addition to simple parameter optimization, different cycle operating conditions, such as CO2 condensation have been analyzed. Among the cycle operating parameters, only the maximum CO2 temperature is somewhat fixed by the reactor (sodium) side. The cycle efficiency increases with the maximum (turbine inlet) temperature (Figure 1), so it is beneficial to raise the CO2 temperature in the Na-to-CO2 heat exchanger as close to the Na temperature as is practically achievable. For the recompression S-CO2 Brayton cycle, the cycle efficiency depends on the CO2 flow split between the compressors. Therefore, in the optimization presented below, each considered parameter is varied simultaneously with the flow split fraction; i.e., the fraction of the CO2 flow which goes through the cooler and the main compressor, to insure that the optimal operating conditions are maintained during the main parameter variation. 4.1. Maximum Pressure Figure 5 shows the dependency of the cycle efficiency on the maximum CO2 pressure. In the analysis, the size of each piece of equipment is fixed, including the number of stages for the turbine and compressors. Figure 5 generally confirms that very little gain in cycle efficiency could be realized by raising the maximum cycle pressure above 20 MPa. Raising the pressure would require greater thicknesses for the piping, pressure-bearing casings, and heat exchangers resulting in higher capital costs. Still, about a 0.3 % increase in cycle efficiency can be achieved if the maximum cycle pressure is raised to 22 MPa. Again, this number represents the efficiency benefit for the equipment optimized previously for 20 MPa conditions. Further increase in efficiency could potentially be achieved through optimization of the turbomachinery and heat exchangers for the greater pressure. 18PDF Image | Performance Improvement Options for the Supercritical Carbon Dioxide Brayton Cycle
PDF Search Title:
Performance Improvement Options for the Supercritical Carbon Dioxide Brayton CycleOriginal File Name Searched:
61951.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 |