Patent ID: 6212895
Filing Date: 2001-04-10
Classification: B23Q

Abstract:
A closed loop cooling system for cooling meat handling machines, comprising:a factory having a portion designed to accommodate refrigerant handling equipment and a portion isolated from refrigerant handling equipment;a first heat exchanger located in the portion of the factory designed to accommodate refrigerant handling equipment, the heat exchanger having liquid refrigerant on a first side and a coolant fluid for transporting heat energy on a second side;a coolant loop which circulates the coolant fluid to a coolant supply header located in the portion of the factory isolated from refrigerant handling equipment, the coolant supply header having a first selected diameter;a coolant return header having a second selected diameter, connected to a surge tank and a pump, the pump supplying the coolant fluid to the second side of the heat exchanger;a plurality of individual machine cooling loops, each machine cooling loop passing through a heat exchanger mounted on an individual machine for cooling the hydraulic fluid employed by each said machine;each individual machine cooling loop having a flow meter and a regulating valve for adjustment of the flow of the coolant fluid therethrough,wherein the refrigerant is ammonia and the coolant fluid is a solution of ethylene glycol and water,wherein the first heat exchanger, the pump and the surge tank are located on a roof of the factory which is part of the portion of the factory designed to accommodate ammonia handling equipment, and wherein the coolant supply header and the coolant return header are positioned between the roof of the building and a false ceiling within the portion of the factory isolated from ammonia handling equipment.