| 摘要 |
A special unitary heat exchange unit for safely heating potable water from the waste heat of a number of refrigeration units is formed of a large diameter pipe perhaps 4 to 10 inches in diameter and perhaps 6 to 20 feet in length to extend along a refrigeration rack. The water to be heated is passed through the length of the heat exchanger, which is essentially a cylindrical tank enclosing a number of small double walled coils each constituting a heat exchanger through which freon or other similar refrigeration gas is passed for cooling. The double walled coils include the inner tube which carries freon, and an intermediate buffer zone in which a non-poisonous heat transfer liquid is located. The outer metal tubing is sealed to the inner freon containing tubing immediately outside the heat exchanger with a low pressure seal so that any break in the high pressure freon line will cause the freon to escape into or to be vented into the atmosphere, and no contamination of the potable water being heated will occur. |
