Cooling method for controlled high speed chilling or freezing
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25D-017/02
F25D-017/00
출원번호
US-0276440
(2001-05-16)
국제출원번호
PCT/US01/015821
(2001-05-16)
§371/§102 date
20030409
(20030409)
국제공개번호
WO02/014753
(2002-02-21)
발명자
/ 주소
Wood,Brian
Cassell,Allan J.
출원인 / 주소
Supachill Technologies Pty. Ltd.
대리인 / 주소
Galasso &
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
A cooling method for controlled high speed chilling or freezing is disclosed. Cooling fluid is circulated by a submersed circulator, such as a motor, at a substantially constant velocity past a substance to be cooled . The velocity of fluid flow is maintained despite changes in the viscosity of the
A cooling method for controlled high speed chilling or freezing is disclosed. Cooling fluid is circulated by a submersed circulator, such as a motor, at a substantially constant velocity past a substance to be cooled . The velocity of fluid flow is maintained despite changes in the viscosity of the cooling fluid, by either increasing or decreasing the amount of torque supplied by the motor. The cooling fluid is cooled to a desired temperature by circulating the fluid past a multi-path heat exchanging coil connected to a refrigeration system. An optimal cooling fluid temperature for a variety of applications is in the range of about-24째 C. to-26째 C., resulting in significant efficiency gains over conventional cooling processes.
대표청구항▼
What is claimed is: 1. A method for cooling substances comprising: circulating cooling fluid past a substance to be cooled; and controlling the circulation of the cooling fluid such that the cooling fluid is circulated at a substantially constant predetermined velocity past the substance to be cool
What is claimed is: 1. A method for cooling substances comprising: circulating cooling fluid past a substance to be cooled; and controlling the circulation of the cooling fluid such that the cooling fluid is circulated at a substantially constant predetermined velocity past the substance to be cooled by associating the circulation with a change in cooling fluid viscosity so as to maintain circulation of the cooling fluid at the substantially constant predetermined velocity even as viscosity of the cooling fluid changes. 2. The method as in claim 1, further comprising circulating the cooling fluid past a heat exchanging coil submersed in the cooling fluid, and wherein the heat exchanging coil is capable of removing the same amount of heat from the cooling fluid as the amount of heat the cooling fluid removes from the substance. 3. The method as in claim 2, wherein the heat exchanging coil is a multi-path coil. 4. The method as in claim 2, wherein the size of the heat exchanging coil is directly related to an area through which the cooling fluid is circulated, wherein the area is about 24 inches wide and 48 inches deep. 5. The method as in claim 2, further comprising cooling the heat exchanging coil with a refrigeration unit substantially matching load requirements of the heat exchanging coil. 6. The method as in claim 1, further comprising maintaining the cooling fluid at a temperature of between about-24 degrees centigrade and-26 degrees centigrade. 7. The method as in claim 1, wherein at least one circulator is used to circulate the cooling fluid, and wherein controlling the circulation comprises controlling the circulator to produce a desired circulation rate. 8. The method as in claim 7, wherein the circulator comprises: a motor; and an impeller rotatably coupled to the motor such that the impeller rotates to circulate the cooling fluid. 9. The method as in claim 7, wherein an additional circulator is employed for each foot of cooling fluid to be circulated past an area not greater than about 24 inches wide and 48 inches deep. 10. The method as in claim 1, wherein the circulation rate is about 35 liters per minute per foot of cooling fluid through an area not greater than about 24 inches wide and 48 inches deep. 11. The method as in claim 1, wherein the cooling fluid is a solute. 12. The method as in claim 1, further comprising freezing the substance at a controlled freezing rate. 13. The method as in claim 12, wherein controlling the freezing rate comprises controlling the substantially constant predetermined circulation rate of the cooling fluid. 14. The method as in claim 12, wherein controlling the freezing rate comprises controlling the velocity of cooling fluid flowing past the substance to be cooled. 15. The method as in claim 12, wherein controlling the freezing rate comprises controlling the temperature of the cooling fluid. 16. The method as in claim 1, further comprising cooling the substance at a controlled cooling rate. 17. The method as in claim 16, wherein controlling the cooling rate comprises controlling the substantially constant predetermined circulation rate of the cooling fluid. 18. The method as in claim 16, wherein controlling the cooling rate comprises controlling the velocity of cooling fluid flowing past the substance to be cooled. 19. The method as in claim 16, wherein controlling the cooling rate comprises controlling the temperature of the cooling fluid such that the temperature differential throughout the cooling fluid is maintained within about 0.5 degrees centigrade. 20. A method for cooling substances comprising: circulating cooling fluid past a substance to be cooled using at least one circulator; and controlling the at least one circulator to maintain a substantially constant predetermined velocity of cooling fluid circulated past the substance to be cooled, wherein said controlling the at least one circulator includes changing at least one operating parameter of the at least one circulator while the cooling fluid is being circulated in response to associating a change in at least one operating parameter of the at least one circulator with a change in cooling fluid viscosity thereby maintaining circulation of the cooling fluid at the substantially constant predetermined velocity even as viscosity of the cooling fluid changes. 21. The method as in claim 20, further comprising circulating the cooling fluid, at the substantially predetermined velocity, past a heat exchanging coil submersed in the cooling fluid, and wherein the heat exchanging coil is capable of removing at least the same amount of heat from the cooling fluid as the amount of heat the cooling fluid removes from the substance. 22. The method as in claim 21, wherein the heat exchanging coil is a multi-path coil. 23. The method as in claim 21, wherein the size of the heat exchanging coil is directly related to an area through which the cooling fluid is circulated, wherein the area is about 24 inches wide by 48 inches deep. 24. The method as in claim 21, further comprising cooling the heat exchanging coil with a refrigeration unit substantially matching load requirements of the heat exchanging coil. 25. The method as in claim 20, further comprising maintaining the cooling fluid at a temperature of between about-24 degrees centigrade and-26 degrees centigrade. 26. The method as in claim 20, wherein controlling the at least one circulator comprises adjusting the force exerted by the circulator on the cooling fluid such that the substantially constant predetermined velocity of the cooling fluid circulated past the substance to be cooled is maintained. 27. The method as in claim 20, wherein the circulation rate is about 35 liters per minute per foot of cooling fluid through an area not greater than about 24 inches wide and 48 inches deep. 28. The method as in claim 20, wherein the circulator comprises: a motor; and an impeller rotatably coupled to the motor such that the impeller rotates to circulate the cooling fluid. 29. The method as in claim 20, wherein an additional circulator is employed for each foot of cooling fluid to be circulated past an area not greater than about 24 inches wide and 48 inches deep. 30. The method as in claim 20, wherein the cooling fluid is a solute. 31. The method as in claim 20, further comprising freezing the substance at a controlled freezing rate. 32. The method as in claim 31, wherein controlling the freezing rate comprises controlling the substantially constant predetermined velocity of the cooling fluid circulated past the substance to be cooled. 33. The method as in claim 31, wherein controlling the freezing rate comprises controlling the volume of cooling fluid. 34. The method as in claim 31, wherein controlling the freezing rate comprises controlling the temperature of the cooling fluid. 35. The method as in claim 20, further comprising cooling the substance at a controlled cooling rate. 36. The method as in claim 35, wherein controlling the cooling rate comprises controlling the substantially constant predetermined velocity of the cooling fluid circulated past the substance to be cooled. 37. The method as in claim 35, wherein controlling the cooling rate comprises controlling the volume of cooling fluid. 38. The method as in claim 35, wherein controlling the cooling rate comprises controlling the temperature of the cooling fluid such that the temperature differential throughout the cooling fluid is maintained within about 0.5 degrees centigrade. 39. A method for cooling a substance comprising: circulating cooling fluid past the substance using at least one circulator; determining changes in cooling fluid viscosity due to thermal transfer; and altering circulator force to compensate for the changes in cooling fluid viscosity, such that a substantially constant predetermined velocity of fluid past the substance is maintained. 40. The method as in claim 39, further comprising circulating the cooling fluid at the substantially constant predetermined velocity past a heat exchanging coil submersed in the cooling fluid, and wherein the heat exchanging coil is capable of removing at least the same amount of heat from the cooling fluid as the amount of heat the cooling fluid removes from the substance. 41. The method as in claim 40, wherein the heat exchanging coil is a multi-path coil. 42. The method as in claim 40, wherein the size of the heat exchanging coil is directly related to an area through which the cooling fluid is circulated, wherein the area is about 24 inches wide and 48 inches deep. 43. The method as in claim 40, further comprising cooling the heat exchanging coil with a refrigeration unit substantially matching load requirements of the heat exchanging coil. 44. The method as in claim 39, further comprising maintaining the cooling fluid at a temperature of between about-24 degrees centigrade and-26 degrees centigrade. 45. The method as in claim 39, wherein the circulation rate is about 35 liters per minute per foot of cooling fluid through an area not greater than about 24 inches wide and 48 inches deep. 46. The method as in claim 39, wherein the circulator comprises: a motor; and an impeller rotatably coupled to the motor such that the impeller rotates to circulate the cooling fluid; and wherein the circulator force is a torque supplied by the motor. 47. The method as in claim 39, wherein an additional circulator is employed for each foot of cooling fluid to be circulated past an area not greater than about 24 inches wide and 48 inches deep. 48. The method as in claim 39, wherein the cooling fluid is a solute. 49. The method as in claim 39, further comprising freezing the substance at a controlled freezing rate. 50. The method as in claim 49, wherein controlling the freezing rate comprises controlling the substantially constant predetermined circulation rate of the cooling fluid. 51. The method as in claim 49, wherein controlling the freezing rate comprises controlling the volume of cooling fluid. 52. The method as in claim 49, wherein controlling the freezing rate comprises controlling the temperature of the cooling fluid. 53. The method as in claim 39, further comprising cooling the substance at a controlled cooling rate. 54. The method as in claim 53, wherein controlling the cooling rate comprises controlling the substantially constant predetermined circulation rate of the cooling fluid. 55. The method as in claim 53, wherein controlling the cooling rate comprises controlling the velocity of the cooling fluid flowing past the substance to be cooled. 56. The method as in claim 53, wherein controlling the cooling rate comprises controlling the temperature of the cooling fluid such that the temperature differential throughout the cooling fluid is maintained within about 0.5 degrees centigrade.
Prien, Samuel D.; Blanton, John; Pond, Kevin R.; Miller, Markus F.; Wood, Brian; Cassell, Allan J., Cryogenic preservation of biologically active material using high temperature freezing.
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