PDF Publication Title:
Text from PDF Page: 074
58 Chapter 5 Results and discussion 5.2.2 Measurement of effectiveness In order to see what effect experimental errors have on the measured effectiveness, the manner in which this effectiveness is calculated is outlined here. Apparatus for temperature and flow rate measurement has been described earlier along with the apparatus set-up and method used to test for heat transfer effectiveness of a single matrix heat exchanger, in chapter four. Thermocouple locations and gas flow paths are shown in Figure 5.5. The effectiveness is calculated from the boil-off of liquid nitrogen as (5.1) where vN2 is the volume flow rate of the boil-off from the LN2 bath, ill MHE is the mass flow rate in the heat exchangers and Th,i etc. refer to the temperatures of the fluid in the heat exchanger. The effectiveness is also calculated from temperature differences as or T -T .e - h,i h,o temp T .-T . h,l C,l T -T. B-C,O C,I temp T .-T . h,1 C,I (5.2) (5.3) In addition to the boil-off induced by the ineffectiveness of the heat exchanger, there is some boil-off from the inner liquid nitrogen bath due to heat leak from the surroundings. This is measured at the end of each test run since it varies depending on the liquid level in the inner and outer baths. It is measured by turning the flow through the liquid nitrogen heat exchanger (LN2-HX) off, ie. the total gas flow passes through the bypass valve. A typical graph of nitrogen boil-off versus time after the flow has been turned off is shown in Figure 5.3. For each test data point this value is subtracted from the measured boil-off. Since it is used to zero the boil-off rate it is referred to as the zero- rate. The density of the gaseous nitrogen boil-off is calculated knowing the ambient pressure and flowmeter temperature. The enthalpy of vaporisation of nitrogen is adjusted for ambient pressure using a second order polynomial fitted for data listed in the IUPAC, Chemical Data Series on nitrogen[102]. The nominal flow rate of gaseous nitrogen in the MHE's is distinguished from the actual flow rate only by a correction to account for variation of ambient pressure and flowmeter temperature. For these tests the maximum difference between nominal and actual flow rate was 3.7% (12°C,I025mbar). All plotted values are calculated using the actual flow rate.PDF Image | CO2 removal from air for alkaline fuel cells operating with liquid H2
PDF Search Title:
CO2 removal from air for alkaline fuel cells operating with liquid H2Original File Name Searched:
35465756.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 |