PDF Publication Title:
Text from PDF Page: 067
18 Heat exchangers Heat exchangers can use up to 30% of total ORC cost. They consist of evaporator, regenerator and condenser.22 According to a study 50 higher evaporator pressure results in less overall heat exchanger area in ORC. This includes the total heat transfer area in evaporator, condenser, de‐supper heater (explained in appendix, section: A‐2), and pre‐heater. To increase evaporator pressure, pump should be adjusted in order to give higher pressures in evaporator inlet. Moreover, as already mentioned, reasonable higher evaporator pressure is interesting, since overall turbine size will be decreased and this will bring down the cost. However, excessive high pressures in heat exchangers result in more expensive materials for its manufacturing. Hence, a balance on chosen pressure should be gained. In some applications, it is recommended to keep this pressure bellow 20 bars to prohibit expensive materials for heat exchanger manufacturing (Ulli Drescher, Dieter Bru ̈ggemann, 2007). 19 Boilers – evaporators Boilers are normally divided into two sections which are both shell and tube heat exchangers. One is responsible for pre‐heating the liquid working fluid to boiling temperature, while the other section will evaporate it. Normally exhaust gas is in the shell while the ORC working fluid moves in tube side. To avoid corrosion the tube part is from copper or stainless steel and shell part is cylindrical to increase the heat transfer area.22 Vapor and liquid separation is done between boiler shell and casing in outside part. Since only dry vapor is admitted to turbine, a signal from a float control valve will be needed. This will adjust feed pump speed or mass flow recirculation from pump exit to pump inlet in order to control the flow into to boiler and receive dry vapor after boiler. If vapor can be admitted to turbine, a single pass system will be used to give desired wetness of vapor and external recirculation will not be needed any more. In this case, a cheaper type of plate fin can be used. A vapor fraction control system however shall be added. Normally this control system uses a reference data from fluid after turbine. A small fraction of flow from boiler outlet is throttled to condenser inlet. This sample must be supper heated when reaching condenser pressure. By knowing the sample pressure and temperature at condenser inlet its enthalpy is measured. By equating this 50 A.A. Lakew, O. Bolland, Working fluids for low temperature heat source, Applied Thermal Engineering (2010), doi: 10.1016/j.applthermaleng.2010.02.009: Page: 33. 63PDF Image | Exergy
PDF Search Title:
ExergyOriginal File Name Searched:
orc-evaluation.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)