There is provided a sublimation defrosting method for removing a frost layer adhering to a cooling surface for cooling a to-be-cooled gas, including a heating/temperature-rising step of heating an adhesion portion of the cooling surface, to which the frost layer adheres, to rise a temperature of the adhesion portion by a heat source located on an adhesion portion side with respect to the frost layer, under a temperature condition below a melting point of the frost layer.

There is provided a sublimation defrosting method for removing a frost layer adhering to a cooling surface for cooling a to-be-cooled gas, including a heating/temperature-rising step of heating an adhesion portion of the cooling surface, to which the frost layer adheres, to rise a temperature of the adhesion portion by a heat source located on an adhesion portion side with respect to the frost layer, under a temperature condition below a melting point of the frost layer.

A heat exchanger includes: a plate-like fin having one end and an other end in a first direction; and a first heat transfer tube and a second heat transfer tube that each extends through the fin and that are adjacent to each other in a second direction. A portion to which the fin and the first heat transfer tube are connected and a clearance portion that separates between the fin and the first heat transfer tube are disposed between the fin and the first heat transfer tube. The clearance portion is disposed at one end side in the first direction relative to an imaginary center line that passes through a center of the first heat transfer tube in a long side direction and that extends along a short side direction.

Disclosed is a heat exchanger, including a plurality of adjacent sheets. An upper surface of each sheet is provided with a plurality of raised peak lines that are arranged in parallel and spaced rows and raised upward, and a lower surface of each sheet is provided with a plurality of raised contour lines that are arranged in parallel and spaced rows and raised downward. A first flow channel and a second flow channel are formed between adjacent three sheets. Fluid flows through the first flow channel along a first direction and a second direction, and fluid flows through the second flow channel along the first direction and a third direction. A convection is formed by the fluid flowing through the first flow channel and the second flow channel. The present disclosure can improve heat exchange efficiency and be easy to industrialize.

Disclosed is a heat exchanger, including a plurality of adjacent sheets. An upper surface of each sheet is provided with a plurality of raised peak lines that are arranged in parallel and spaced rows and raised upward, and a lower surface of each sheet is provided with a plurality of raised contour lines that are arranged in parallel and spaced rows and raised downward. A first flow channel and a second flow channel are formed between adjacent three sheets. Fluid flows through the first flow channel along a first direction and a second direction, and fluid flows through the second flow channel along the first direction and a third direction. A convection is formed by the fluid flowing through the first flow channel and the second flow channel. The present disclosure can improve heat exchange efficiency and be easy to industrialize.

A heat exchanger and a method for manufacturing a heat exchanger, the heat exchanger comprising: a first plurality of layers, each of the first plurality of layers including: a corrugated sheet comprising a series of regular corrugations across its width for flow of liquid therethrough, the series of corrugations having a predetermined period; and a de-congealing channel for flow of liquid across the width of the corrugated sheet in parallel with the corrugations, the de-congealing channel formed at least in part by two adjacent corrugations, that are separated by greater than the predetermined period.

A heat exchanger and a method for manufacturing a heat exchanger, the heat exchanger comprising: a first plurality of layers, each of the first plurality of layers including: a corrugated sheet comprising a series of regular corrugations across its width for flow of liquid therethrough, the series of corrugations having a predetermined period; and a de-congealing channel for flow of liquid across the width of the corrugated sheet in parallel with the corrugations, the de-congealing channel formed at least in part by two adjacent corrugations, that are separated by greater than the predetermined period.

An arrangement (400) for removing condensate from a heat exchanger (208) is provided. The arrangement (400) facilitates removal of a condensate from the heat exchanger (208) even when the pressure inside the heat exchanger drops below pressure of a condensate discharge pipe (220). The arrangement (400) operates in a first configuration when the pressure in the heat exchanger (208) is higher than the pressure in the condensate discharge pipe (220), and in a second configuration when the pressure in the heat exchanger (208) is lower than the pressure in the condensate discharge pipe (220).

A gas dehumidification device having two heat exchangers, each including a first and second fluid line. Each second fluid line at least partially surrounds the respective first fluid line. Each heat exchanger thermally couples a fluid in the respective heat exchanger second fluid line with a first coolant on an outside surface of the respective heat exchanger second fluid line. The gas dehumidification device further comprises a two-position valve. In a first position, a fluid comprising a higher temperature than the first and/or second coolant is conducted into the first heat exchanger first fluid line and in the second position, the fluid is conducted into the second heat exchanger first fluid line. A controller is configured to place the valve selectively into the first or second position.

A heat exchanger can be configured to utilize multiple sections of hardway fins that can be configured so that an upper first section of the fins can build up liquid head and a second lower section of the fins can be configured to distribute liquid in an even, or uniform, manner. The first section of fins can utilize a different type of hole arrangement than the second section of fins. For instance, the diameter or width of the holes in the first section may differ from the diameter or width of the holes of the second section. In addition (or as an alternative), fin frequency and/or spacing between immediately adjacent holes in the first section of fins may be different from the spacing between immediately adjacent holes in the second section of fins.