Abstract: Disclosed are heat pipes of the type having a condenser section in which gaseous refrigerant is condensed to produce liquid refrigerant comprising: (a) at least one closed pipe comprising: (i) a condenser section, (ii) a first evaporator section in fluid communication with said condenser section; and (iii) at least a second evaporator section in fluid communication with said condenser section; (b) refrigerant contained in said heat pipe; (c) at least a first liquid flow path leading a first portion of liquid refrigerant condensed in said condenser section to said first evaporator section; and (d) at least a second liquid flow path leading a second portion of liquid refrigerant condensed in said condenser section to said second evaporator section, wherein said second evaporator section comprises a reservoir holding liquid refrigerant at a location different than said first evaporator section.

Abstract: Heat pipes and low-pressure working fluids used for heat pipes are described, by charging the low pressure working fluids with a level of non-condensable gases of less than 1% by volume, and the heat pipes can provide better thermal performance than aluminum plates while little or no additional cost is introduced for degassing.

Abstract: The present invention also includes methods of transferring heat comprising: (a) providing a heat pipe comprising an evaporating section containing a liquid working fluid comprising at least about 60% by weight of cis 1-chloro-3,3,3-trifluoropropene and a condensing section containing a working fluid vapor comprising cis 1-chloro-3,3,3-trifluoropropene; (b) placing said evaporating section in thermal communication with a body, fluid, surface or the like to be cooled; and (c) placing said condensing section in thermal communication with a body, fluid, surface or the like to be heated.