PDF Publication Title:
Text from PDF Page: 001
2011 International Conference on Advanced Materials Engineering IPCSIT vol.15 (2011) © (2011) IACSIT Press, Singapore Heat Transfer Analysis of Vapor Compression System Using Nano Cuo-R134a Eed Abdel-Hafez Abdel-Hadi1, Sherif Hady Taher1 Abdel Hamid Mohamed Torki2 and Samar Sabry Hamad2 1Shobra Faculty of Engineering, Benha University, Cairo, Egypt. 2Higher Technological Institute 10th of Ramadan City,6th October branch, Cairo, Egypt Abstract. Improving heat transfer characteristics in refrigeration and air conditioning systems has been intensively studied by many investigators. In the present work the effect of using nano CuO-R134a in the vapour compression system on the evaporating heat transfer coefficient is experimentally investigated. An experimental test rig is designed and constructed here for this purpose. The test section is a horizontal tube in tube heat exchanger made from copper. The refrigerant is evaporated inside an inner copper tube and the heat load is provided from hot water that passing in an annulus surrounding the inner tube. Measurements were performed for heat flux ranged from 10 to 40 kW/m2, using nano CuO concentrations ranged from 0.05 to 1% and particle size from 15 to 70 nm. The measurements indicated that for a certain nano concentration as heat flux or mass flux increases the evaporating heat transfer coefficient increases. The measurements indicated also that the evaporating heat transfer coefficient increases with increasing nano CuO concentrations up to certain value then decreases. Comparison with the available published data shows good agreement. Keywords: Evaporating Heat Transfer Coefficient, Heat Flux, Mass Flux, Nano CuO Concentration, R134a. 1. Introduction With the progress of thermoscience and thermal engineering applications, many efforts have been devoted to increase heat transfer enhancement. Among these techniques is the use of additives to liquids. Since the flow media themselves may be the controlling factor of limiting heat transfer performance, solid additives are suspended in the base liquids in order to change transport propertiesof flow and heat transfer features of the liquids [1,2]. Nanoparticles can be used to improve the working fluid properties due to their special properties which have attracted attention worldwide [3,4]. Besides describing chronological development in this field. HFC 134a is the most widely used alternative refrigerant in refrigeration equipment such as domestic refrigerator and automobile air-conditioners [5]. First proposed creating "nanofluids" by suspending high thermal conductivity nanoscale metallic or non-metallic particles in base fluid. These nanofluids have been shown to have superior heat transfer capabilities [6,7]. The application of nanoparticles in refrigerator oil is also studied [8,9]. The heat transfer characteristics of nano fluids inside horizontal tubes are investigated [10]. 2. Experimental Test Rig The objectives of the present study are investigating the effects of adding nano CuO on R134a for various values of heat flux, nonoparticles size and concentration on the evaporating heat transfer coefficient. An experimental test rig is constructed to fulfill these objectives where the experimental measurements are performed. Fig.1 shows a schematic diagram for the experimental test rig. The experimental test rig consists of two different loops; the refrigerant loop and the water loop. In the refrigeration loop, the refrigerant vapor is taken form the evaporator (7) and goes to the compressor (10) then condensed in a water cooled condenser 80PDF Image | Heat Transfer Analysis of Vapor Compression System Using Nano Cuo-R134a
PDF Search Title:
Heat Transfer Analysis of Vapor Compression System Using Nano Cuo-R134aOriginal File Name Searched:
16_ICAME2011_D012.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 |