Heat transfer methods, systems and compositions

US11787989B2 · kind B2 · utility

Assignee

• HONEYWELL INTERNATIONAL INC. · US

Inventors

• Ankit Sethi · Pune, IN
• Samuel F. Yana Motta · East Amherst, US
• Elizabet del Carmen Vera Becerra · Amherst, US
• Yang Zou · Dallas, US
• Henna Tangri · Williamsville, US
• Gregory Laurence Smith · Niagara Falls, CA

Key dates

• Filing date: May 18, 2021
• Grant date: Oct 17, 2023
• Expiry date: May 18, 2041

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F25B9/006
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed are methods for providing heating and/or cooling of the type comprising evaporating refrigerant liquid and condensing refrigerant vapor in a plurality of repeating cycles, where the method comprises (a) providing the refrigerant comprising at least about 5% by weight of a lower alkyl iodofluorocarbon; and (b) exposing at least a portion of said refrigerant in at least a portion of said plurality of said cycles to a sequestration material comprising: i) copper or a copper alloy; ii) a molecular sieve (preferably a zeolite), comprising copper, silver, lead or a combination thereof; iii) an anion exchange resin, and iv) a combination of two or more of these, wherein said exposing temperature is preferably above about 20 C.