PDF Publication Title:
Text from PDF Page: 118
Referring to Tables 5-7 and 5-8, the Reynolds number for ethanol vapor flow (ReD,eth,v) through the channels is 2,130, the absolute roughness of the channel surface (e) is estimated to be 1.5 μm, and the hydraulic diameter of the channels (Dh) is 0.761 mm. The Churchill friction factor (fchurch) is therefore found to be 0.03. With an ethanol mass flux of 30.9 kg m-2 s-1, an ethanol density of 2.43 kg m-3, and a hydraulic diameter of 0.761 mm, the pressure drop per unit length for ethanol through the single-phase portion of the condenser is 7.86 kPa m-1. The required length of the first section of the condenser is found using the formulas for each area in equation (5.28): A N NN πDL (5.52) s,in s,tube ch t row h cond,sp 2N N t row w t L (5.53) t t cond,sp A From Table 5-9, the number of channels per tube (Nch) is 17, the number of tubes per row (Nt) is 30, and the number of rows (Nrow) is 2. With a tube width of 20.4 mm and a tube thickness of 1.5 mm, the required inner tube surface area is 0.088 m2 and the required outer tube surface area is 0.095 m2. Therefore, the required length of the single-phase section of the condenser is 0.037 m. Note that the fin efficiency of the areas between the microchannels has been neglected here. This can be justified by calculating the fin efficiency (equation (5.33) and equation (5.34)) and treating the area between the microchannels as a rectangular fin with thickness equal to 0.41 mm (minimum distance between microchannels) and fin height equal to the hydraulic radius of 0.38 mm. Taking the thermal conductivity of the fin as 240 W m-1 K-1 and using the single-phase ethanol heat transfer coefficient of 110 W m-2 K-1, the fin efficiency is 99.99%. For the two-phase section of the condenser, the ethanol heat transfer coefficient is higher at 3,650 W m-2 K-1 which gives a fin efficiency of 99.64%. The fin efficiencies are very close to 100% and can therefore be neglected without significantly affecting the results. 96PDF Image | WASTE HEAT RECOVERY FROM A HIGH TEMPERATURE DIESEL ENGINE
PDF Search Title:
WASTE HEAT RECOVERY FROM A HIGH TEMPERATURE DIESEL ENGINEOriginal File Name Searched:
Adler_colostate_0053N_14539.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 |