PDF Publication Title:
Text from PDF Page: 161
D Steady-state moving-boundaries heat exchanger model 3. The calculated heat transfer area is compared to the actual heat transfer area. If it is higher, the temperature profile is updated to increase the pinch point. If it is lower, the temperature profile is updated to decrease the pinch point. Failure occurs if: 1. The initial conditions are poorly defined, leading the situation of Figure 101. 2. The update of the temperature profile during iterations leads to a negative pinch point. To avoid failures when these cases occur, the LMTD equations are slightly modified to avoid logarithms of negative numbers. A penalty is assigned in terms of required area when this is the case. The code below corresponds to the case of a moving boundaries counterflow condenser model and is applied for each of the three zones: if Tsf,su < Tr,ex - 1 then if Tsf_ex < Tr,su - 1 then ΔTlog=(Tsf ,su−Tr,ex)−(Tsf ,ex−Tr ,su) ln(Tsf ,su−Tr ,ex ) Tsf ,ex−Tr,su ΔTlog=Tsf ,su−Tr ,ex+1⋅ 1 ln(Tr ,ex−Tsf ,su) 1+ξ⋅(Tsf ,ex−Tr ,su+1) else if Tsf,ex < Tr,su - 1 then ΔTlog=Tsf ,ex−Tr,su+1⋅ 1 ln(Tr,su−Tsf,ex) 1+ξ⋅(Tsf,su−Tr,ex+1) else endif endif A= Q ̇ U⋅ΔTlog else ΔTlog= 1 (1+ξ⋅(Tsf ,su−Tr,ex+1))⋅(1+ξ⋅(Tsf ,ex−Tr ,su+1)) ξ is the penalty factor. It is set arbitrarily to 104. When the difference between the secondary fluid temperature profile and the refrigerant temperature profile is lower than 1K, the expression of the LMTD is "freezed" to that temperature difference and divided by a penalty term proportional to the difference between refrigerant and secondary fluid temperatures. By doing this, the calculation of A is artificially impacted and leads to very high required heat transfer areas when the temperature XIVPDF 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 | RSS | AMP |