The determination of the viscosity of liquid carrene-7, an azeotropic mixture of dichlorodifluoromethane and asymmetrical difluoroethane

The most important method of preserving perishable materials is by refrigeration. Refrigeration generally means the removal of heat from a body or substance to such an extent as to leave it, or maintain it, at a lower temperature than that of the surroundings. Mechanical refrigeration refers to the removal of heat by mechanical devices. In mechanical refrigeration cycles a large variety of refrigerants, such as ammonia, sulfur dioxide, methyl chloride, freon-12 (dichlorodifluoromethane), and propane are used. These refrigerants must have properties that render them suitable for use in refrigeration cycles. During the refrigeration cycle, the refrigerant is constantly changing state; that is, from a liquid to a gas and vice versa with a corresponding change in temperature. One of the fundamental properties affecting the mechanical behavior of a refrigerant is its viscosity. Not only is it the major factor in relation to the transfer of the material, but it also has marked effect on the heat transfer characteristics of the refrigerant. Inasmuch as the refrigeration cycle depends on both of these operations, a knowledge of the viscosity of the refrigerant is highly desirable. It was the purpose of this investigation to determine the liquid viscosities of an azeotropic of asymmetrical difluoromethane and dichlorodifluoromethane.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Chemical Engineering

Department dc:contributor.department

Chemical Engineering

Grantor dc:publisher

Virginia Polytechnic Institute

Year dc:date.issued

1950

Author dc:creator

• Hicks, Jack Holland

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en_US

Handle dc:identifier.uri

http://hdl.handle.net/10919/52157

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/52157