PDF Publication Title:
Text from PDF Page: 004
compress the gas. Unlike the alpha type, the beta type avoids the technical problems of hot moving seals. Figure 3 Beta Configuration[5] Gamma Type A Gamma Stirling is simply a beta Stirling in which the power piston is mounted in a separate cylinder alongside the displacer piston cylinder, but is still connected to the same flywheel. The gas in the two cylinders can flow freely between them and remains a single body. This configuration produces a lower compression ratio, but is mechanically simpler and often used in multi-cylinder Stirling engines. Figure 4 Gamma Configuration 4. MATERIAL SELECTION AND DIMENSIONS OF LTD STIRLING ENGINE AND CALCULATION OF EFFICIENCY Generally most of power producing devices is designed based on output power requirement. But case is very much different for low temperature difference Stirling engine. Ltd Stirling engine are designed based on heat input available from the heat source and temperature difference available across the engine. LTD Stirling engines are generally having configuration of gamma type, because in gamma configuration large area is made exposed to heat source and sink. So it is effective for recovering low temperature waste heat. Some characteristics of the LTD Stirling engine are as follows; 1. Displacer to power piston swept volumes ratio is large, 2. Diameter of displacer cylinder and displacer is large , 3. Displacer is short , 4. Effective heat transfer surfaces on both end plates of the displacer cylinder are large, 5. Displacer stroke is small, 6. Dwell period at the end of the displacer stroke is rather longer than the normal Stirling engine, 7. Operating speed is low. 4.1 Material Selection & Dimensions of Heat Exchanging Surfaces and Displacer Cylinder Hera area of heat exchanging surfaces is fixed up by area available at (waste) heat rejecting system and area available also fixes the displacer diameter and its height. Heat exchanging surfaces have to be of higher thermal conductivity so that better heat transfer can take place from source to system and from system to surrounding. Kinds of the heat exchanging surface materials that satisfy above requirement and can be used are as follows: IJAET/Vol.III/ Issue I/January-March, 2012/305-310 1. Copper, 2. Aluminum, 3. Mild steel, 4. G.I. (galvanized iron). We have used aluminium sheet (2mm thick). Size:: Aluminium: 200 * 200 * 2 mm. Figure 5 heat exchange surface Displacer cylinder should have good resistance to heat transfer (lower thermal conductivity) so that heat cannot flow from hot surface to cold surface through cylinder body. Kinds of the displacer cylinder materials that satisfy above requirement and can be used are as follows: 1) Wood, 2) Concrete , 3) Plastic, 4) Glass. We want to design LTD Stirling engine model for recovering waste heat from exhaust gases of I.C. engine or wood fired water heater. So we made heat exchanging surfaces of 200mm*200mm area and thickness of 2mm. Material that we selected was aluminum. And displacer cylinder of diameter 125mm, height of 50mm and thickness of 2mm. Material that we selected was plastic. It is the cylinder in which displacer performs its stroke. Displacer cylinder must have low thermal conductivity, because heat should not flow from hot surface to cold surface. Size: Plastic: 125 mm diameter, 1 mm thickness . Figure 6 displacer cylinder 4.2 Material Selection and Dimensions of Displacer There is empirical relation available for diameter of displacer that the diameter of displacer should be somewhat smaller than diameter of piston so that it gives small radial clearance around 2mm to 3mm between displacer and its cylinder for displacing of air across cylinder. Thickness of displacer should be slightly greater than half the height of displacer cylinder. Diameter of displacer ≈ diameter of displacer cylinder – 2* radial clearance [6] Displacer has to be light in weight and good resistant to heat transfer. So material of displacer should be of lower density and lower thermal conductivity. Kinds of displacer materials that satisfy above requirement and can be used are as follows: 1) Wood ,2) Thermocol , 3) RPF (reinforced plastic). International Journal of Advanced Engineering Technology E-ISSN 0976-3945PDF Image | Research Paper WASTE HEAT RECOVERY USING STIRLING ENGINE
PDF Search Title:
Research Paper WASTE HEAT RECOVERY USING STIRLING ENGINEOriginal File Name Searched:
68_IJAET_Vol_III_Issue_I_2012.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 (Standard Web Page)