Abstract: A capillary assisted loop thermosiphon apparatus (100) has at least one evaporator (102) connected by a vapor line (104) to a condenser (106); a liquid line (108) connects the condenser (106) and the evaporator (102), the evaporator (102) is in the direction of gravity from the condenser (106) for the condenser (106) to supply liquid under gravity induced pressure to the evaporator (102), and the evaporator (102) has a vertical capillary wick (102a) in which liquid wicks in the direction of gravity.

Abstract: A capillary assisted loop thermosiphon apparatus (100) has at least one evaporator (102) connected by a vapor line (104) to a condenser (106); a liquid line (108) connects the condenser (106) and the evaporator (102), the evaporator (102) is in the direction of gravity from the condenser (106) for the condenser (106) to supply liquid under gravity induced pressure to the evaporator (102), and the evaporator (102) has a vertical capillary wick (102a) in which liquid wicks in the direction of gravity.

Abstract: A capillary assisted loop thermosiphon apparatus (100) has at least one evaporator (102) connected by a vapor line (104) to a condenser (106); a liquid line (108) connects the condenser (106) and the evaporator (102), the evaporator (102) is in the direction of gravity from the condenser (106) for the condenser (106) to supply liquid under gravity induced pressure to the evaporator (102), and the evaporator (102) has a vertical capillary wick (102a) in which liquid wicks in the direction of gravity.

Abstract: A capillary assisted loop thermosiphon apparatus (100) has at least one evaporator (102) connected by a vapor line (104) to a condenser (106); a liquid line (108) connects the condenser (106) and the evaporator (102), the evaporator (102) is in the direction of gravity from the condenser (106) for the condenser (106) to supply liquid under gravity induced pressure to the evaporator (102), and the evaporator (102) has a vertical capillary wick (102a) in which liquid wicks in the direction of gravity.

Abstract: A capillary structure for a heat transfer device, such as a heat pipe is provided having a plurality of particles joined together by a brazing compound such that fillets of the brazing compound are formed between adjacent ones of the plurality of particles. In this way, a network of capillary passageways are formed between the particles to aid in the transfer of working fluid by capillary action, while the plurality of fillets provide enhanced thermal transfer properties between the plurality of particles so as to greatly improve over all heat transfer efficiency of the device. A method of making the capillary structure according to the invention is also presented.

Abstract: A capillary structure for a heat transfer device, such as a heat pipe is provided having a plurality of particles joined together by a brazing compound such that fillets of the brazing compound are formed between adjacent ones of the plurality of particles. In this way, a network of capillary passageways are formed between the particles to aid in the transfer of working fluid by capillary action, while the plurality of fillets, provide enhanced thermal transfer properties between the plurality of particles so as to greatly improve over all heat transfer efficiency of the device.

Abstract: A grooved sintered wick for a heat pipe is provided having a plurality of individual particles which together yield an average particle diameter. The grooved sintered wick further includes at least two adjacent lands that are in fluid communication with one another through a particle layer disposed between the lands where the particle layer comprises at least one dimension that is no more than about six average particle diameters. A heat pipe is also provided comprising a grooved wick that includes a plurality of individual particles having an average diameter. The grooved wick includes at least two adjacent lands that are in fluid communication with one another through a particle layer disposed between the lands that comprises less than about six average particle diameters. A method for making a heat pipe wick in accordance with the foregoing structures is also provided.

Abstract: A capillary structure for a heat transfer device, such as a heat pipe is provided having a plurality of particles joined together by a brazing compound such that fillets of the brazing compound are formed between adjacent ones of the plurality of particles. In this way, a network of capillary passageways are formed between the particles to aid in the transfer of working fluid by capillary action, while the plurality of fillets. provide enhanced thermal transfer properties between the plurality of particles so as to greatly improve over all heat transfer efficiency of the device.

Abstract: A grooved sintered wick for a heat pipe is provided having a plurality of individual particles which together yield an average particle diameter. The grooved sintered wick further includes at least two adjacent lands that are in fluid communication with one another through a particle layer disposed between the lands where the particle layer comprises at least one dimension that is no more than about six average particle diameters. A heat pipe is also provided comprising a grooved wick that includes a plurality of individual particles having an average diameter. The grooved wick includes at least two adjacent lands that are in fluid communication with one another through a particle layer disposed between the lands that comprises less than about six average particle diameters. A method for making a heat pipe wick in accordance with the foregoing structures is also provided.

Abstract: A heat pipe is provided having a tubular enclosure with an internal surface, a working fluid disposed within the enclosure, and at least one fin projecting radially outwardly from an outer surface of the tubular enclosure. The tubular enclosure is sealed at one end by a base having a grooved sintered wick disposed on at least a portion of its internally facing surface. The grooved, sintered wick comprises a plurality of individual particles having an average diameter. The grooved wick includes at least two adjacent lands that are in fluid communication with one another through a particle layer disposed between said at least two adjacent lands that comprises less than about six average particle diameters.

Abstract: A grooved sintered wick for a heat pipe is provided having a plurality of individual particles which together yield an average particle diameter. The grooved sintered wick further includes at least two adjacent lands that are in fluid communication with one another through a particle layer disposed between the lands where the particle layer comprises at least one dimension that is no more than about six average particle diameters. A heat pipe is also provided comprising a grooved wick that includes a plurality of individual particles having an average diameter. The grooved wick includes at least two adjacent lands that are in fluid communication with one another through a particle layer disposed between the lands that comprises less than about six average particle diameters. A method for making a heat pipe wick in accordance with the foregoing structures is also provided.

Abstract: The method comprises applying to a surface to be etched a coating of a borax-free, low dichromate, casein photoresist liquid composition comprising an acid-precipitated casein, sodium hydroxide as an alkalizing agent, an alkali dichromate photosensitizer and water. The composition has a pH in the range of 6.0 to 7.0, and reduced quantities of the alkalizing agent and photosensitizer compared to prior coating compositions.