PDF Publication Title:
Text from PDF Page: 044
Rapport 2414173 - October 2007 __________________________________________________________________ Transcritical R744 heat pumps are fundamentally different because: • there is no distinction between liquid and vapor phase before expansion; • there is no value of "subcooling" after the gas cooling process – because subcooling does not exist as such; • the relationship between high pressure and refrigerant charge in the system is more complex than for conventional refrigerants. Transcritical R744 domestic systems are normally factory-charged. The refrigerant charge has numerous effects, particularly on the value of the compressor discharge pressure. Inappropriate refrigerant charge could thus lead to improper heat pump operation and/or equipment damage. This explains why most residential heat pumps are only serviced in the manufacturer workshop or at an authorized service station. Thus, any attempt to recharge R744 heat pumps should not be made, unless it is authorized by the manufacturer. Recharging a R744 system can only by carried out if full and explicit instructions are provided by the heat pump manufacturer. Annex 1, which shows excerpts from an Ecocute Service Manual issues important warnings against attempts to recharge the unit. Systems using R744 must be thoroughly evacuated like conventional refrigeration systems. Before any servicing, make sure that all the following is available to carry out refrigerant recharging : • Instructions from the manufacturer, including required information, e.g. the total amount of refrigerant for recharge. • Components required, e.g. filter/driers for R744 and suitable for the required design operating pressures should be used. • Appropriate recharging station if specified by manufacturer. Recharging R744 systems like conventional systems is not readily possible. With HFC refrigerants and other systems it is common practice to recharge liquid via the liquid line upon completion of the evacuation i.e. when the plant is still under vacuum. This is not possible with an R744 system because dry ice would form internally at the charging point when the system pressure is less than around 6 bar, because of expansion (see Section 6.1.1). Before charging liquid R744 into the system on the high pressure side, it is therefore necessary to increase the system pressure to a level of about 6 bar using gaseous R744. __________________________________________________________________________________________ SHERPHA PROJECT - Transcritical R744 Heat Pumps – Technician's Manual 45/62PDF Image | NATURAL REFRIGERANTS
PDF Search Title:
NATURAL REFRIGERANTSOriginal File Name Searched:
Infinity_R744.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)