PDF Publication Title:
Text from PDF Page: 021
Task 2 Wet/Dry Heat Rejection Analysis power demand of each fan is 219 kWe; at 140 °F, the demand falls to 182 kWe. A polynomial expression is included in the Excelergy parasitic block calculations to model this effect, as follows: .EparCt = (CtPar)[(CtParF0 + (CtParF1)(AmbTemp(D, H, T)) + (CtParF2)(AmbTemp(D, H, T))2)] (.PbLoad) where .EparCt is the cooling tower energy demand at each time step, CtPar is the fan power demand at the design point, the coefficients CtParP0 through CtParF2 adjust the fan power demand with the ambient temperature, and .PbLoad is the ratio of gross electric output at each time step to the design electric output. As such, the number of cooling tower fans in operation is assumed to be proportional to the turbine output. 4.2 Wet Heat Rejection The gross output of the Rankine cycle was calculated using a modified Excelergy format for wet cooling towers. The effect of the wet bulb temperature on the Rankine output was modeled as follows: Ntc = TempCorr0 + TempCorr1 * Ttc + TempCorr2 * Ttc2 .EgrSol = .EgrSol * Ntc where Ttc is the dry bulb temperature, and the three coefficients TempCorr0 through TempCorr2 are derived from a second order polynomial fit of GateCycle calculations of the gross turbine output plotted as a function of the dry bulb temperature. Each dry bulb temperature is assumed to have a corresponding relative humidity, as illustrated in the trend line of Figure 8. At the design point, the parasitic energy consumption was estimated to be 881 kWe for the cooling tower fans, and 653 kWe for the circulating water pumps. For combinations of ambient temperature and Rankine cycle output other than the design point, the energy demand was calculated as follows: .EparCt = (CtPar)[(CtParF0 + (CtParF1)(AmbTemp(D, H, T)) + (CtParF2)(AmbTemp(D, H, T))2)] (.PbLoad) where the coefficients CtParP0 through CtParF2 are based on GateCycle calculations which adjust the fan and the circulating water pump power demands with the ambient temperature. 4.3 Annual Performance Comparison The results of the annual performance calculations for the dry and the wet heat rejection cases are shown in Table 7. Cases 1 through 6 use dry heat rejection systems, with initial temperature differences of 24 °F to 49 °F, respectively. Case 7 is the same as Case 4, but with the condenser pressure limited to 8 in. HgA.. Case 8 uses a wet heat rejection system. The dry heat rejection cases deliver 91 to 96 percent of the annual electric energy supplied by the wet heat rejection case, and have annual solar-to-electric efficiencies 0.5 to 0.7 percentage points lower. However, the annual water use for the dry cases is only about 8 percent of that for the wet case. - 17 -PDF Image | Nexant Parabolic Trough Solar Power Plant Systems Analysis
PDF Search Title:
Nexant Parabolic Trough Solar Power Plant Systems AnalysisOriginal File Name Searched:
40163.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 |