PDF Publication Title:
Text from PDF Page: 151
Chapter 5 5.5.2 Assessment of Dynamic Performance As far as the results of the analysis of the system dynamics are concerned, Fig. 5.8b illustrates the transient response of the system for two points of the Pareto front (i.e., those corresponding to the designs with the largest and the smallest volume). The influence of the ORC power module design on the network frequency transient is clearly visible: the lower the volume, the larger the undershoot and the overshooting of the frequency. On the contrary, large values of the volume limit the frequency drop, by increasing the thermal inertia of the system. Figure 5.9a relates the volume to the minimum frequency reached during the transient, for each point of the Pareto front. The curve presents a highly non-linear trend, with the magnitude of the frequency variations increasing more sharply for decreasing volume. According to the standards for power quality adopted by the platform owner, the frequency undershoot must not exceed 4% of the nominal value. Thus, as results from the dynamic analysis, ORC power modules characterized by overall volume VORC lower than 50 m3 violate this constraint. These designs are therefore identified as unfeasible, and marked with the hollow square () symbol in Figs. 5.8a and 5.9a. Figure 5.9b reports the rise time as a function of volume. The rise time is defined here as the time required for the frequency to return back to 99% of the value at steady state. The trend of the curve is also non-linear with a minimum of approximately 14 s at 65 m3. 140 120 100 80 60 40 3.5 1.02 1 0.98 0.96 (b) 20 15 10 3 V [m] ORC freq. [-] load [MW] 3 V =45m ORC 4 4.5 PNET,ORC [MWE] 5.5 6 1200 1250 time [s] 3 V =126 m 5 ORC load 0 1300 1350 5 (a) Figure 5.8: 5.8a multi-objective optimization results, the objective functions, e.g. the ORC system net power ment VORC . The designs identified by the symbol are discarded due to the unacceptable frequency undershoot, while those marked with △ due to volume limitations. The other designs (filled circles) are deemed acceptable. 5.8b results of the dynamic test, the grey line represents the correspond- ing load variation. Normalized frequency and combined cycle load vs time for the two designs characterized by the maximum and minimum values of VORC. Figure 5.10a shows the time evolution of the temperature at the inlet of the ORC turbine T6, together with that of the exhaust gases exiting the gas turbine T10 for three points of the Pareto front. As the load of the gas turbine undergoes a sharp variation, the temperature and the mass flow of the exhaust gases entering the OTB rise. As anticipated in §5.4.2, the dynamics of T6 is much slower than that of T10. The two major contributions to the delay are the inertia of the metal walls 140 Pareto front showing the relation between and the volume of the heat transfer equip-PDF Image | New Concepts FOR Organic Rankine Cycle Power Systems
PDF Search Title:
New Concepts FOR Organic Rankine Cycle Power SystemsOriginal File Name Searched:
PhDTesis_ECasati.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)