Heat exchange system

• US 3,384,154 A
• Filed: 05/12/1964
• Issued: 05/21/1968
• Est. Priority Date: 08/30/1956
• Status: Expired due to Term

• Current Assignee: Robert M. Milton
• Original Assignee: Robert M. Milton
• Inventors: Milton, Robert M.
• Application Number:
  US04/366,853
• Time in Patent Office: 1,470 Days
• US Class Current: 165/133
• CPC Class Codes: B01D 1/22 by bringing a thin layer of the liquid into contact with a heated surface B01D1/065 takes precedence
• CPC Class Codes: F25J 2250/02 Bath type boiler-condenser using thermo-siphon effect, e.g. with natural or forced circulation or pool boiling, i.e. core-in-kettle heat exchanger
• CPC Class Codes: F25J 2290/44 Particular materials used, e.g. copper, steel or alloys thereof or surface treatments used, e.g. enhanced surface
• CPC Class Codes: F25J 3/04412 in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
• CPC Class Codes: F25J 5/002 for continuously recuperating cold, i.e. in a so-called recuperative heat exchanger
• CPC Class Codes: F25J 5/005 in a reboiler-condenser, e.g. within a column
• CPC Class Codes: F28D 2021/0033 for cryogenic applications
• CPC Class Codes: F28F 1/12 the means being only outside the tubular element
• CPC Class Codes: F28F 13/187 especially adapted for evaporator surfaces or condenser surfaces, e.g. with nucleation sites
• CPC Class Codes: F28F 2255/18 sintered
• CPC Class Codes: F28F 3/025 the means being corrugated, plate-like elements
• CPC Class Codes: Y10S 165/907 Porous
• CPC Class Codes: Y10S 165/911 Vaporization

Claims

5. A PROCESS FOR TRANSFERRING HEAT FROM A WARM FLUID TO A BOILING LIQUID COMPRISING THE STEPS OF PROVIDING HEAT EXCHANGE APPARATUS HAVING A THERMALLY CONDUCTIVE WALL WITH A POROUS BOILING LAYER BONDED TO ONE SIDE OF SUCH WALL, SAID POROUS BOILING LAYER BEING CONSTRUCTED OF THERMALLY CONDUCTIVE PARTICLES BONDED TOGETHER TO FORM INTERCONNECTED PORES OF CAPILLARY SIZE HAVING AN EQUIVALENT PORE RADIUS LESS THAN ABOUT 4.5 MILS;

COMPLETELY COVERING SAID POROUS BOILING LAYER DIRECTLY WITH SAID LIQUID AS AT LEAST A LIQUID FILM;

AND CONTACTING THE WARM FLUID WITH ANOTHER SIDE OF SAID WALL SUCH THAT VAPOR BUBBLES ARE FORMED WITHIN SAID POROUS BOILING LAYER BY HEAT TRANSFERRED THERETO FROM SAID WARM FLUID;

AND DISCHARGING SAID VAPOR AS BUBBLES EMERGING FROM SAID POROUS BOILING LAYER INTO THE LIQUID FILM PORTION COVERING SAID POROUS BOILING LAYER.