Walter A Hans

US Patent:

47518235, Jun 21, 1988

Filed:

Oct 2, 1985

Appl. No.:

6/783137

Inventors:

Walter A. Hans - Maple Shade NJ

International Classification:

F25D 1702

US Classification:

62201

Abstract:

A control arrangement for a heat recovery system which can be retrofitted onto existing equipment in order to utilize otherwise wasted heat. A heat source such as a conventional refrigeration system used as a source of superheated condensible heat exchange medium for supply to a heat recovery system. A liquid medium system, such as a water system is connected to the heat recovery system for receipt of heat transferred. The heat recovery system includes a plurality of heat exchangers connected in series. A control arrangement responsive to the operating conditions and safety of the heat recovery system and to the systems with which it interfaces with respect to its effect on said interfaced systems. The control arrangement further comprises pressure and temperature sensing devices controlling output temperatures of the liquid medium and maintaining proper pressures within the heat exchangers preventing vaporization of liquid, and further maintaining proper working pressures and liquid levels in the refrigeration system.