FIELD: obtaining of flow of expanding natural gas of various degree of heating by means of heat exchange with the environment, four modifications of the device may be used. SUBSTANCE: in the first modification the flow of expanded gas is passed through a heat exchanger. In the second modification gas is passed through a two-flow vortex tube, and the cold flow obtained after it is fed to the heat exchanger. In the third modification gas, before it is fed to the vortex tube, is divided into two parts and one part is carried into a recuperator, then to a throttle and heat exchanger, after that this part is combined with the cold flow from the vortex tube and fed to the recuperator, and then combined with the hot flow from the vortex tube. In the fourth modification gas after the recuperator and throttle is combined with the cold flow from the vortex tube and fed to the heat exchanger. EFFECT: higher efficiency. 9 cl, 5 dwg
