PDF Publication Title:
Text from PDF Page: 012
Thermal Energy Equipment: Waste Heat Recovery 3. ASSESSMENT OF WASTE HEAT RECOVERY This section explains how to assess the potential for waste heat recovery and gives examples. 3.1 Determining the Waste Heat Quality When recovering waste heat, the quality of waste heat must be considered first. Depending upon the type of process, waste heat can be discarded at virtually any temperature from that of chilled cooling water to high temperature waste gases in an industrial furnace or kiln. Usually, higher temperatures equate to higher quality of heat recovery and greater cost effectiveness. In any study of waste heat recovery, it is absolutely necessary that there is some use for the recovered heat. Typical examples of use would be preheating of combustion air, space heating, or pre-heating boiler feed water or process water. With high temperature heat recovery, a cascade system of waste heat recovery may be practiced to ensure that the maximum amount of heat is recovered with the highest potential. An example of this technique of waste heat recovery is where the high temperature stage is used for air pre- heating and the low temperature stage is used for process feed water heating or steam generation. 3.1.1 Quality and potential uses In considering the potential to recover heat, it is useful to note all the possible sources of waste and their quality and possible uses (see Table 1) Table 1. Waste Heat Source and Quality No Source of waste heat 1 Heat in flue gases 2 Heat in vapor streams 3 Convective & radiant heat lost from exterior of equipment 4 Heat losses in cooling water 6 Heat stored in products leaving the process 7 Heat in gaseous & liquid effluents leaving process Quality of waste heat and possible use The higher the temperature, the greater the potential value for heat recovery As for heat in flue gases, but when condensed, latent heat is also recoverable Low grade – if collected, may be used for space heating or air preheats Low grade –useful gains if heat is exchanged with incoming fresh water Quality depends upon temperature Poor, if heavily contaminated & thus require alloy heat exchanger 5 Heat losses in providing chilled water or in the disposal of chilled water 1. High grade if it can be utilized to reduce demand for refrigeration 2. Low grade if refrigeration unit used as a form of Heat pump 3.1.2 Recovery potential for different industrial processes Waste heat can be recovered from various industrial processes. A distinction is made between high, medium and low temperatures of waste heat. Energy Efficiency Guide for Industry in Asia –www.energyefficiencyasia.org ©UNEP 12PDF Image | Thermal Energy Equipment Waste Heat Recovery
PDF Search Title:
Thermal Energy Equipment Waste Heat RecoveryOriginal File Name Searched:
Chapter-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 | RSS | AMP |