PDF Publication Title:
Text from PDF Page: 129
Chapter 6: Case studies pressure ratio ( rp ,1=rp,2=√(rp)). However, the efficiency also depends on the flow rate flowing through the expander because a higher flow rate entails a higher output power and makes the constant losses (e.g. friction losses) relatively smaller. In the polynomial correlations, the influence of the flow rate is reflected by the dependence in terms of supply vapor density or pressure. To determine the optimal first-stage pressure ratio, the overall isentropic efficiency is maximized using the following equation: dε = d [h1−h3 ]=0 (87) drp,1 drp,1 h1−h3s This can be done numerically or analytically. For the latter solution, ε must be expressed in terms of rp,1, which can be achieved using the ideal gas hypothesis. The analytical solution of Eq. 87 is obviously more efficient than the numerical one in terms of computational effort. It is derived in Appendix G. Pumps. Two pump consumptions are taken into account: the heat transfer fluid pump and the working fluid pump. They are modeled by a constant isentropic efficiency. For the HTF pump, the pressure difference is given by the pressure drop in the evaporator and in the collector while for the ORC pump, it is given by the difference between evaporating and condensing pressures. A constant, realistic value of 70% is assumed for both pump efficiencies. Condenser model. Since air condensers are well-known components in HVAC applications, a simplified model based on manufacturer data (Witt, 2004) is used to compute the condenser performance and fan consumption. The two inputs are the pinch point, defined as the difference between the condensing temperature and the ambient temperature, and the condensing power. Special attention is paid to the fan consumption since it can amount for a non- negligible share of the generated power. The fan consumption is computed as a function of the heat transfer power and of the pinch point with the following relation (Witt, 2004) : W ̇ f a n , c d = 5 4 . 5 + 0 . 0 1 8 5 ⋅ Q ̇ c d ⋅ 8 . 3 3 pinchcd (88) Cycle model. The global model of the system is obtained by interconnecting each subcomponent model according to Figure 78. Several performance indicators can be defined. The overall collector efficiency: ηcol=M ̇ htf⋅c̄phtf⋅(Thtf ,ex, col−Thtf ,su ,col) (89) S beam⋅Lcol⋅W col The net electrical output power: W ̇ net=W ̇ exp−W ̇ pp−W ̇ fans−W ̇ pp ,htf (90) 9PDF Image | Organic Rankine Cycles for Waste Heat Recovery and Solar Uses
PDF Search Title:
Organic Rankine Cycles for Waste Heat Recovery and Solar UsesOriginal File Name Searched:
58881261.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)