Abstract: A machine for circulating cooling water through manufacturing process equipment includes a combination pump and heat exchanger assembly. The machine has a cast metal pump case with two upwardly opening sockets receiving the lower ends of two tanks, one of them "the suction tank" communicating through the case with the pump impeller intake, and the other "the discharge tank" communicating with the impeller discharge. The tanks are constructed to function as heat exchangers, and they are readily and removably secured to the pump case by threaded fasteners and are sealed therein by compression seals. The discharge tank has electrical heating elements. The suction tank has a motor-operated modulator valve precisely fixed thereon, so as to enable discharging excessively warm water from the process to drain while cool make-up water from city water supply is admitted through the suction tank to the pump.

Abstract: A portable, wheel-mounted, mechanically-refrigerated chiller for water used to cool a heat generating manufacturing process machine, has a process cooling water flow sensor assembly with conventional connections into the process water circulation portion of the chiller. The assembly includes a magnetically impregnated plastic vane operated by water flow through it, and a Hall-effect motion sensor responsive to vane operation to provide a signal to a computer. Water temperature to the process and from the process is monitored by sensors producing signals to the computer. The computer combines this information to produce a front panel digital read-out of the percent of capacity at which the chiller is operating or, upon selection, the refrigeration tonnage applied by the chiller to the process water.

Abstract: A mechanically refrigerated chiller system for a process coolant has a process coolant circuit which includes a coolant reservoir with refrigerant evaporator coils in it. Coolant returns from the process to the reservoir through several and alternate paths. An additional coolant path is provided through a heat exchanger. An extra hot-gas line from the high pressure side of the refrigerant compressor is coupled through the heat exchanger to the refrigerant condenser. When the temperature of the coolant is too low, adjustment is made by adding heat to some of the coolant in the heat exchanger. Coolant temperature is sensed in an area where coolant returns from the process through a direct path and in another area where the coolant is leaving the evaporator through the aforementioned heat exchanger are mixed with a portion of the reservoir coolant.

Abstract: A mechanically refrigerated chiller system for a process coolant has a process coolant circuit which includes a coolant reservoir with refrigerant evaporator coils in it. Coolant returns from the process to the reservoir through several and alternate paths. An additional coolant path is provided through a heat exchanger. An extra hot-gas line from the high pressure side of the refrigerant compressor is coupled through the heat exchanger to the refrigerant condenser. When the temperature of the coolant is too low, adjustment is made by adding heat to some of the coolant in the heat exchanger. Coolant temperature is sensed in an area where coolant returns from the process through a direct path and in another area where the coolant is leaving the evaporator through the aforementioned heat exchanger are mixed with a portion of the reservoir coolant.

Abstract: A mechanically refrigerated chiller system for a process coolant has a process coolant circuit which includes a coolant reservoir with refrigerant evaporator coils in it. Coolant returns from the process to the reservoir through several and alternate paths. An additional coolant path is provided through a heat exchanger. An extra hot-gas line from the high pressure side of the refrigerant compressor is coupled through the heat exchanger to the refrigerant condenser. When the temperature of the coolant is too low, adjustment is made by adding heat to some of the coolant in the heat exchanger. Coolant temperature is sensed in an area where coolant returns from the process through a direct path and in another area where the coolant is leaving the evaporator through the aforementioned heat exchanger are mixed with a portion of the reservoir coolant.