PDF Publication Title:
Text from PDF Page: 006
1230 X.R. Zhang, H. Yamaguchi / Applied Thermal Engineering 28 (2008) 1225–1233 heat quantity collected in the collector during the test time period per day (an integral of the heat quantity collected in the collector on a test time period), gcollector is the time- weighted average collector efficiency. During the tests, the two major error sources are: (1) temperature, pressure and flow rate measurement accuracy; (2) error resulting from data logging and reading by the computer. The error of data logging and reading include as follows: ±0.1% for CO2 temperature; ±0.3% for CO2 pressure; ±0.3% for CO2 mass flow rate; ±0.2% for water temperature; ±0.3% for water flow rate; ±0.3% for solar radiation; ±0.2% for atmospheric temperature. A detailed error analysis indicates that the maximum uncertainty in the performance parameters is less than ±3.0%. Therefore, these errors are acceptable for the present study. 3. Experimental results and discussion In the present study, the main concern is focused on the characteristics of the supercritical CO2-based solar collec- tor, including CO2 temperature and pressure, CO2 flow rate achieved in the CO2 loop, heat quantity collected in solar collector and collector efficiency. The experimental tests are carried out under a CO2 charge amount of 8.0 kg in the CO2 loop. The experimental data is arranged in daily, monthly and annually. All the tests are conducted in the Kyoto area of Japan. First, one day is selected as representative weather. The selected day of spring season is one with annually-averaged air temperature and solar radiation for the Kyoto area, not too hot and not too cold, and also solar radiation being not high and not low. The measured solar radiation and air temperature of the selected day in the spring season of 2005 are presented in Fig. 3. From the figure, it is seen that the day is sometimes sunny and sometimes cloudy. The test was carried out from 10:00 to 18:00 and the time-averaged air temperature during the test time period is measured at 22.1°C and the time-averaged solar radiation is at 0.50 kW/m2. Both the air temperature and solar radiation represent the average level during one year in the Kyoto area. The CO2 temperature and pressure are measured in the experimental test. The variations of the measured CO2 tem- perature (T1) at the collector outlet are shown in Fig. 4. It can be seen that the CO2 temperature in the collector increases with the solar radiation. During the test period of the day, the CO2 temperature varies from 85.0 °C to 187.5 °C at the collector outlet. The averaged CO2 temper- Fig. 8. Pressure–enthalpy diagrams measured in the experiment. (a) 10:00; (b) 17:00.PDF Image | study on evacuated tube solar collector using supercritical CO2
PDF Search Title:
study on evacuated tube solar collector using supercritical CO2Original File Name Searched:
evac_tube_CO2.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 |