Heat removal method and heat removal apparatus

Abstract

A heat removal apparatus able to remove heat with a high heat flux from a large area is provided. A heat removal apparatus 1 has a heat removal use channel 31 provided adjacent to a heat removal object HO and a liquid supply use channel 32 extending along the heat removal use channel 31 and through which a liquid state refrigerant flows. In a wall portion 36 a partitioning the heat removal use channel 31 and the liquid supply use channel 32 , communicating holes 38 communicating the heat removal use channel 31 and the liquid supply use channel 32 are provided at a plurality of positions. The liquid state refrigerant is supplied from the liquid supply use channel 32 to the heat removal use channel 31 via the communicating holes 38 , whereby a liquid film is formed on an inner circumferential surface of the heat removal use channel 31 . The liquid film evaporates by the heat from the heat removal object HO, and the evaporated refrigerant is discharged from the heat removal use channel 31.

1 . A heat removal method comprising removing heat of a heat removal object by supplying a liquid state refrigerant into a heat removal use channel, which is provided to extend along the heat removal object and has a longer channel length than width of a surface along the heat removal object, from an opening, which opens towards inside of the heat removal use channel in a side wall of the heat removal channel at a side of a plate shaped member forming the surface along the heat removal object of the heat removal use channel and abutting against the heat removal object, in a predetermined range in the flow direction of the heat removal use channel, forming a liquid film of the refrigerant over the predetermined range on the inside surface of the plate shaped member, making the liquid film evaporate by the heat from the heat removal object, and discharging the evaporated refrigerant from the heat removal use channel. 
   
   
       2 . A heat removal method as set forth in  claim 1 , supplying the liquid state refrigerant at a plurality of positions over the predetermined range. 
   
   
       3 . A heat removal method comprising removing heat of a heat removal object by supplying a liquid state refrigerant into a heat removal use channel, which is provided adjacent to the heat removal object, in a predetermined range of a flow direction of said heat removal use channel, forming a liquid film of the refrigerant over the predetermined range on an inside surface of a plate shaped member forming said heat removal use channel and abutting against the heat removal object, making the liquid film evaporate by the heat from the heat removal object, and discharging the evaporated refrigerant from the heat removal use channel, wherein
 In said supplying the liquid state refrigerant into the heat removal use channel, the refrigerant is supplied from an opening formed at an outer circumference, which sticks out into the heat removal use channel toward the plate shaped member, of a liquid supply channel, which extends along the heat removal channel, and opening towards inside surface of the plate shaped member.   
   
   
       4 . A heat removal apparatus comprising:
 a heat removal use channel provided to extend along a heat removal object and having a longer channel length than width of a surface along the heat removal use channel; and   a liquid supply portion constructed to supply a liquid state refrigerant into the heat removal use channel from an opening, which opens towards inside of the heat removal use channel in a side wall of the heat removal channel at a side of a plate shaped member forming the surface along the heat removal object of the heat removal use channel and abutting against the heat removal object, in a predetermined range in the flow direction of the heat removal use channel, form a liquid film of the refrigerant over the predetermined range on the inside surface of the plate shaped member, make the liquid film evaporate by the heat from the heat removal object, and discharge the evaporated refrigerant from the heat removal use channel.   
   
   
       5 . A heat removal apparatus as set forth in  claim 4 , wherein the opening opens at a position nearer the plate shaped member than the surface of the heat removal use channel facing the plate shaped member. 
   
   
       6 . A heat removal apparatus as set forth in  claim 4 , wherein said opening is provided at each of two side walls facing each other, and
 said liquid supply portion can also supply the liquid state refrigerant from a second opening, which opens towards the plate shaped member, of a projecting part projecting out from a surface facing the plate shaped member of the heat removal use channel toward the plate shaped member between the two side walls.   
   
   
       7 . A heat removal apparatus as set forth in  claim 4 , wherein a mass ratio of a flow rate of the evaporated refrigerant with respect to the total flow rate of the refrigerant in the heat removal use channel is equal to or larger than 0.2. 
   
   
       8 . A heat removal apparatus as set forth in  claim 7 , comprising:
 a control unit controlling a rate of supply of the liquid state refrigerant to the heat removal use channel to approach a target value set so that the mass ratio becomes equal to or larger than 0.2.   
   
   
       9 . A heat removal apparatus as set forth in  claim 4 , wherein the liquid supply portion supplies the liquid state refrigerant at a plurality of positions over the predetermined range. 
   
   
       10 . A heat removal apparatus as set forth in  claim 4 , wherein the liquid supply portion has a liquid supply use channel which extends along said heat removal use channel at a side of the plate shaped member and is partitioned from said heat removal use channel by said side wall, and the opening is constructed to allow passage of the liquid state refrigerant from the liquid supply use channel to the heat removal use channel. 
   
   
       11 . A heat removal apparatus as set forth in  claim 4 , wherein the heat removal use channel is partitioned to a plurality of sections in the flow direction, and the plurality of sections each are provided with discharge ports discharging the gas state refrigerant. 
   
   
       12 . A heat removal apparatus as set forth in  claim 4 , wherein the heat removal use channel has discharge ports of the refrigerant provided at both ends in the flow direction. 
   
   
       13 . A heat removal apparatus as set forth in  claim 4 , wherein the inside surface of the plate shaped member is provided with groove portions to which the liquid state refrigerant is stuck by surface tension to spread the film of the refrigerant to the inside surface. 
   
   
       14 . A heat removal apparatus as set forth in  claim 13 , wherein the groove portions extend in a direction traversing the heat removal use channel. 
   
   
       15 . A heat removal apparatus as set forth in  claim 13 , wherein the groove portions extend in a direction along the heat removal use channel. 
   
   
       16 . A heat removal apparatus as set forth in  claim 4 , wherein the inside surface of the plate shaped member is lined by a sheet through which the liquid state refrigerant can permeate and spreading the film of the refrigerant to the inside surface. 
   
   
       17 . A heat removal apparatus as set forth in  claim 4 , wherein the inside surface of the plate shaped member is roughened. 
   
   
       18 . A heat removal apparatus comprising:
 a heat removal use channel provided adjacent to a heat removal object; and   a liquid supply portion constructed to supply a liquid state refrigerant into the heat removal use channel in a predetermined range of a flow direction of the heat removal use channel and form a liquid film of the refrigerant over the predetermined range at an inside surface of a plate shaped member forming the heat removal use channel and abutting against said heat removal object, wherein   said liquid supply portion has a liquid supply use channel extending along said heat removal use channel, having an outer circumference sticking out into the heat removal use channel toward the plate shaped member, being formed with an opening which opens toward the plate shaped member in the outer circumference, and supplying liquid state refrigerant from the opening to the heat removal use channel.