HEAT TRANSFER COMPOSITIONS AND METHODS

Disclosed are methods of retrofitting heat transfer systems containing or designed to containing HFC-134a as the refrigerant comprising: removing at least a portion of said HFC-134a from said system; and introducing into said system a refrigerant comprising at least about 97.5% by weight of the foll...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	Pottker, Gustavo, Yana Motta, Samuel F, Sethi, Ankit, Petersen, Michael
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES BLASTING CHEMISTRY COMBINED HEATING AND REFRIGERATION SYSTEMS DYES HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MECHANICAL ENGINEERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Disclosed are methods of retrofitting heat transfer systems containing or designed to containing HFC-134a as the refrigerant comprising: removing at least a portion of said HFC-134a from said system; and introducing into said system a refrigerant comprising at least about 97.5% by weight of the following four components, with each compound being present in the following relative percentages:(a) from 2% to about 7% by weight of difluoromethane (HFC-32);(b) from 2% to about 7 by weight of pentafluoroethane (HFC-125);(c) from about 35% to about 50% by weight of 1,1,1,2-tetrafluoroethane (HFC-134a); and(d) from about 50% to about 55% by weight of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)).