PDF Publication Title:
Text from PDF Page: 010
Sohel et al. 19 17 15 13 11 9 7 5 1 101 201 301 401 501 601 701 801 901 Time [h] 24 per. Mov. Avg. (Observed) 24 per. Mov. Avg. (Modelled) Figure 12: Vaporizer outlet pressure for 1000 hours of operation 220 210 200 190 180 170 160 150 140 130 120 1 101 201 301 401 501 601 701 801 901 Time [h] 24 per. Mov. Avg. (Observed) 24 per. Mov. Avg. (Modelled) Figure 13: Vaporizer outlet temperature for 1000 hours operation 2.8.2 The vaporizer outlet pressure Figure 12 presents the observed and modelled vaporizer outlet pressure for 1000 hours of operation of the vaporizer. A reasonably close match is easily perceived and the average percentage error is found to be 3.5%. The maximum value of percentage error is quite high (9.27%), and this occurred due to abrupt change in the mass flow of brine. This error occurred at 579 hours of operation which is the peak of a sudden change of mass flow (Figure 10). There were two big peaks of sudden mass flow change at around 580 hours and 700 hours that stayed for a while. These two peaks had a significant effect on the simulation results whereas they do not have the same significant effect on actual operations as these peaks are normally tackled by operators by changing the pentane level, bypassing excess pentane to the condenser, operating the purge system of the condenser manually, and the speed control system of the turbines etc. Therefore, the inability to control these peaks can be considered as a limitation of the developed model. Further models can be developed with capabilities to manage the effect of sudden change; however, the main idea of modelling the power plant is to predict future plant performance depending on geothermal resources and weather. With sudden changes in resource characteristics and weather, plant operators can take over the control from the automatic control. The legitimacy of not developing a model with ability to tackle sudden changes relies on it. 2.8.3 The vaporizer outlet temperature Figure 13 shows the observed and the modelled pentane temperatures at the vaporizer outlet. The average percentage error is found to be 1.1% and the percentage error has a maximum value of 5.14%. A good match between the actual and the modelled vaporizer temperatures is very important. The state of the pentane vapour (p, T, h) at the vaporizer outlet dictates how much energy is available to produce power as the turbine outlet pressure is given to the model externally. In actual plant operation, the turbine outlet pressure does not change much and it is related to the condenser pressure. 2.8.4 The electric power output Figure 14 presents the comparison of the actual and modelled electric power output from the ORC unit. It is evident from the figures (14-15) that the developed model is capable of predicting both daily and seasonal load changes. The average percentage error is 4.8%. All error is calculated as absolute value and the maximum value of percentage error is very high (31.46%). This error occurred at 619 hours of operation for the same reason as discussed in previous paragraphs. There are two peaks of brine mass flow at about 579 and 720 which are taken care of by operators and the control mechanism in place in actual plant operations. The error in vaporizer outlet temperature however, was not much affected by this sudden change in brine mass flow; the main reason behind it is that the dynamics of temperature change 10 Vaporizer outlet temperature [C] Vaporizer outlet pressure [bar]PDF Image | Dynamic Modelling and Simulation of an Organic Rankine Cycle Unit of a Geothermal Power Plant
PDF Search Title:
Dynamic Modelling and Simulation of an Organic Rankine Cycle Unit of a Geothermal Power PlantOriginal File Name Searched:
2609.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)