GB615037A - Improvements in and relating to liquid circuit refrigerating plants with cold accumulator reservoir - Google Patents

Abstract

615,037. Refrigerating. TREPAUD, G. J. H. Aug. 16, 1946, No. 24516. Convention date, Jan. 5, 1945. [Class 29] In refrigerating plants having a cold accumulator 7 for dealing with peak loads, valves 10-15 are provided whereby the accumulator can be inserted in the circuit either before or after the cold utilising appliance e.g. a wort cooler 6. During normal working valves 10, 12, 14 are open and valves 11, 13, 15 closed, and brine is forced by a pump 8 from the evaporator 5 to the cold accumulator 7 and thence to the wort cooler, whence it returns to the evaporator, the accumulator absorbing excess cold. When the demand for refrigeration increases the temperatures of the cold accumulator 7 and the wort cooler 6 rise, and when the temperature of the outlet of the coil 6 reaches 0‹C., the highest permissible value, the cold accumulator is at say -8‹C. The valves 10-15 are then reversed, so that the cold accumulator 7 is inserted in the circuit after the wort cooler. The temperature of the cooler 6 then decreases since it is supplied with brine direct from the evaporator 5, and the brine is returned to the evaporator at -8‹C. and leaves it at say -13‹C. The system may continue to operate under the peak load until the temperature at the outlet of the coil 6 again reaches 0‹C. Upon cessation of the peak load the accumulator 7 is cooled again, and when the temperature of the brine at the outlet of the evaporator reaches its allowable lower limit, say -16‹C., the valves arc reversed again, and the cycle may be repeated. The valves may be automatically operated by a thermostat in the cold accumulator tank. Specification 457,732 is referred to.