Abstract: The invention relates to a backfeeding installation (30) which comprises: modules (31 to 35 and 37) comprising the following functions: at least one compressor for compressing gas, an automaton for controlling the operation of at least one compressor, at least one sensor for checking the quality compliance of the gas circulating in the compressor, at least one meter for metering a flow rate of gas circulating in the compressor, and at least one filter for filtering the gas circulating in the compressor; and an interconnection module (36A, 36B) for interconnection between the other modules and with a gas network (15) at a first pressure and a gas network (10) at a second pressure higher than the first pressure. At least one of these modules is mobile and configured to be transported, in its entirety and operational by means of a removable connection to the interconnection module and to a power source, on a single vehicle.

Abstract: Disclosed is a station (100) for expanding a flow of gas having, at the inlet, a temperature Ta and a pressure Pa, that comprises: an expansion valve (105) for recovering mechanical expansion energy configured to reduce the pressure of the gas flow to a pressure Pb and to a temperature Tb such that Pb<Pa and Tb<Ta; a compressor (110) for compressing a flow of fluid having, at the inlet, a temperature Tc and a pressure Pc; the expansion valve and the compressor are linked mechanically such that the movement of the expansion valve when the gas expands causes the compressor to be actuated such that the fluid is compressed to a pressure Pd and a temperature Td such that Pd>Pc and Td>Tc; and a heat exchanger (115) for exchanging heat between the gas flow at the outlet or inlet of the expansion valve and the fluid flow at the outlet or inlet of the compressor in order to heat the gas and cool the fluid.

Abstract: The invention relates to a backfeeding installation (30) which comprises: modules (31 to 35 and 37) comprising the following functions: at least one compressor for compressing gas, an automaton for controlling the operation of at least one compressor, at least one sensor for checking the quality compliance of the gas circulating in the compressor, at least one meter for metering a flow rate of gas circulating in the compressor, and at least one filter for filtering the gas circulating in the compressor; and an interconnection module (36A, 36B) for interconnection between the other modules and with a gas network (15) at a first pressure and a gas network (10) at a second pressure higher than the first pressure. At least one of these modules is mobile and configured to be transported, in its entirety and operational by means of a removable connection to the interconnection module and to a power source, on a single vehicle.

Abstract: The invention relates to an energy-optimized backfeeding installation (30), comprising: at least one compressor (21) between a gas network (15) at a first pressure and a gas network (10) at a second pressure higher than the first pressure, said compressor being driven by an electric motor, an automaton (25) for controlling the operation of each compressor, at least one sensor (19) for quality compliance of the gas circulating in the compressor, at least one meter (20) for metering a flow rate of gas circulating in the compressor, at least one filter (22) for filtering the gas circulating in the compressor, a gas expander for expanding gas initially at the second pressure in order to supply the gas network at the first pressure, and a generator driven by the gas expander.