PDF Publication Title:
Text from PDF Page: 021
TA 6M: Waste Heat Recovery Table 6.M.9 Limitations of Currently Available WHR Technologies, Medium Temperature Ranges1 Equipment Limitations and Barriers Metallic recuperators Lack economic justification for exhaust gas temperature below 1,000°F in many cases Economically justifiable heat recovery efficiency limit of 40% to 60% High maintenance when used with gases containing particulates, condensable vapors, or combustible material Fouling of heat transfer surfaces Difficulty in maintaining or cleaning the heat transfer surfaces Recuperative burners Lower heat recovery efficiency (usually less than 30%) Limited size availability (usually for burners with less than 1 MM Btu/hr) Cannot be applied to processes where exhaust gases contain particles and condensable vapors Rotary regenerators Seal failure between the high-pressure and low-pressure gases (air) Plugging of exhaust gas passages when the gases contain particulates High pressure drop compared to recuperators Maintenance and operation reliability concerns for rotary mechanism Shell and tube heat exchanger for heating liquid (water) Fouling of heat transfer surfaces when the gases contain particulates or condensable liquids Condensation of moisture at selected cold spots and resulting corrosion While the above tables show limitations and barriers by temperature range, an alternative approach would be to develop a matrix according to the type of equipment available in the market. Key considerations would include its application range (i.e., temperatures and heat source characteristics); performance level; and limitations with respect to industrial applications. Technology Opportunities for Various Temperature Ranges1 R&D opportunities have been categorized according to the temperature regimes at which waste heat is available. All of these are focused on improving the efficiency of WHR and cost reduction through improved lower-cost materials, reduced maintenance, improved design, and other such factors. Opportunities for High and Ultra-High Temperature Waste Heat Sources R&D opportunities for both high temperature waste heat sources (1,200°F – 1,600°F), and ultra-high temperature waste heat sources (>1,600°F) include the following: Heat recovery systems that can handle high-temperature gases with solids and condensable contaminants. These systems can also have internal cleaning systems to enable long-term continuous operation without major maintenance time for cleaning or rebuilding. The systems can be recuperative or regenerative. Materials that can withstand high temperatures and chemical reactions with the waste heat source and the cyclic nature of waste heat in terms of mass flow rates, temperature, or composition. These materials will enable increased life-span heat recovery systems, such as ceramic recuperators. High-temperature phase change materials that can be used by high-temperature heat recovery systems to reduce the size of the system and allow tolerance of the cyclic nature of the waste heat source. Selective coatings or laminations that are compatible with base materials of construction and can withstand specific contaminants and combustibles in the waste gas streams. 20 QuadrennialTechnologyReview2015PDF Image | Innovating Clean Energy Technologies in Advanced Manufacturing
PDF Search Title:
Innovating Clean Energy Technologies in Advanced ManufacturingOriginal File Name Searched:
QTR2015-6M-Waste-Heat-Recovery.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)