FIELD: power engineering, possible use in devices for using cold of natural gas at outlet of cryogenic gas expansion machine for ecologically safe cooling of air in chambers of refrigerator.
SUBSTANCE: method for utilization of cold, generated during expansion of natural gas in at least one cryogenic gas expansion machine with diversion of mechanical energy includes letting cold gas prior to feeding to consumer through at least one heat exchanger with cooling in this heat exchanger of intermediate fire and explosion safe liquid coolant. Heat exchanger is made with direct contact of substances. Cooling of air in cooling chamber is performed by letting cold liquid coolant through heat exchanger of refrigerator, which is returned to heat exchanger for cooling by natural gas. Draining of liquid coolant is compensated by natural gas by means of feeding liquid coolant into its circulation contour when level of liquid coolant decreases in heat exchanger. System for utilization of cold, generated during expansion of natural gas with diversion of mechanical energy contains at least one cryogenic gas expansion machine with device for receipt of mechanical energy, connected to source of high pressure natural gas, heat exchanger for cooling of liquid coolant, at least one chamber of refrigerator with heat exchanger and accumulating vessel for liquid coolant with device for controlling level of liquid coolant, connected to pipeline, connecting outlet for liquid coolant of heat exchanger for cooling of liquid coolant to at least one heat exchanger of refrigerator chamber. Vessel is made with possible connection to liquid coolant storage and through valve for discharging gas - to atmosphere when a signal is received by valve from device for controlling level of liquid coolant.
EFFECT: improved efficiency, increased ecological safety and explosion safety of cold utilization.
2 cl, 3 dwg
