# US 2022/0034697 A1 · Wet gas flow rate metering method based on a coriolis mass flowmeter and device thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0034697 A1 - Document ID: US20220034697A1 - Status: Published application - Kind: A1 - Application number: 17/499,875 - Filed: 2021-10-13 - Published: 2022-02-03 - Earliest claimed: 2019-08-22 - Assignees: Sea Pioneers Technologies Co., Ltd. - Applicants: Sea Pioneers Technologies Co., Ltd. - Inventors: Bin XU; Jige CHEN - Web page: https://patentgrep.com/patent/US20220034697A1 ## CPC - G01F 1/8409: {constructional details} - G01F 1/8436: {signal processing} - G01F 1/8468: {vibrating measuring conduits} - G01K 13/024: of moving gases - G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME - G01K: MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (radiation pyrometry G01J5/00) ## Abstract This application discloses a wet gas flow rate metering method and device thereof. The Coriolis mass flowmeter measures a total mass flow rate Qm, a mixed density ρmix, and a medium temperature T; a combination of sensors measures a differential pressure ΔP between an inlet and an outlet; a flow rate calculation module performs multi-physical field coupling calculation to obtain an average gas density ρg; according to the mixed density ρmix, the average gas density ρg, and a liquid density ρl, a mass liquid content nm of a mixed medium is calculated, and the total mass flow rate Qm is corrected by the mass liquid content ηm, the medium temperature T and the average pressure P to obtain a corrected total mass flow rate Qm′. According to the total mass flow rate Qm′ and the mass liquid content ηm, a two-phase flow rate is calculated. ## Claims ### Claim 1 A wet gas flow rate metering method based on a Coriolis mass flowmeter, comprising the steps of: measuring, by a Coriolis mass flowmeter, a mass flow rate Qm, a mixed density ρmix, a medium temperature T in a pipe; measuring, by a combination of sensors, a pressure P at an inlet and an outlet of the Coriolis mass flowmeter; performing, by a flow rate calculation module, a multi-physical field coupling calculation, calculating pressure P corresponding to different positions X in a measuring pipe of the Coriolis mass flowmeter, and generating a function curve between the position and the pressure; calculating, by the flow rate calculation module, an average pressure P in the measuring pipe of the Coriolis mass flowmeter through the function curve; calculating, by the flow rate calculation module, an average gas density ρg according to the average pressure P; calculating, by the flow rate calculation module, a mass liquid content ηm of a mixed medium according to the mixed density ρmix, the average gas density ρg and a liquid density ρl, specifically comprising using a formula: η m = ρ mix - ρ g ρ 1 - ρ g * ρ 1 ρ mix ; correcting, by the flow rate calculation module, the total mass flow rate Qm according to the mass liquid content ηm, the average pressure P in the measuring pipe and the medium temperature T to obtain a total mass flow rate Qm′; calculating, by the flow rate calculation module, a gas mass flow rate Qg and a liquid mass flow rate Ql according to the mass liquid content ηm and the total mass flow rate Qm′. ### Claim 2 (depends on 1) The wet gas flow rate metering method based on a Coriolis mass flowmeter according to claim 1, wherein the combination of sensors comprises a pressure sensor and a differential pressure sensor that by measuring the pressure at the inlet of the Coriolis mass flowmeter and measuring the differential pressure ΔP at the inlet and the outlet in combination with the mixed density ρmix, obtain the average pressure in the measuring pipe of the Coriolis mass flowmeter through a computational fluid dynamics CFD model. ### Claim 3 (depends on 1) The wet gas flow rate metering method based on a Coriolis mass flowmeter according to claim 1, wherein the combination of sensors comprises two pressure sensors that by measuring the pressure at the inlet and the outlet of the Coriolis mass flowmeter to obtain an actual differential pressure ΔP in combination with the mixed density ρmix, obtain the average pressure in the measuring pipe of the Coriolis mass flowmeter through a computational fluid dynamics CFD model. ### Claim 4 (depends on 1) The wet gas flow rate metering method based on a Coriolis mass flowmeter according to claim 1, wherein the step of calculating, by the flow rate calculation module an average pressure P in the measuring pipe of the Coriolis mass flowmeter through the function curve comprises: calculating by using a calculus area solving to obtain the average pressure P. ### Claim 5 (depends on 4) The wet gas flow rate metering method based on a Coriolis mass flowmeter according to claim 4, wherein the step of calculating, by the flow rate calculation module an average gas density ρg according to the average pressure P comprises: using the pressure and the temperature in combination with a PVT equation of a gas phase medium, using a formula: ρ g ρ 0 = P P 0 * T 0 T , to finally obtain the average gas density ρg; calculating the gas density ρg, wherein P, T are the pressure and the absolute temperature in the measuring pipe of the Coriolis mass flowmeter respectively, ρ0, P0 and T0 are the gas density, the pressure and the absolute temperature in a calibration state respectively. ### Claim 6 (depends on 5) The wet gas flow rate metering method based on a Coriolis mass flowmeter according to claim 5, wherein in the step of correcting, by the flow rate calculation module the total mass flow rate Qm according to the mass liquid content ηm, the average pressure P in the measuring pipe and the medium temperature T to obtain a total mass flow rate Qm′, a specific correction formula is that Qm′=f(P,T,ηm,Qm). ### Claim 7 (depends on 6) The wet gas flow rate metering method based on a Coriolis mass flowmeter according to claim 6, wherein the step of calculating, by the flow rate calculation module a gas mass flow rate Qg and a liquid mass flow rate Ql according to the mass liquid content ηm and the total mass flow rate Qm′ comprises: using a formula Qg=Qm′*(1−ηm) to calculate the gas mass flow rate Qg; using a formula Ql=Qm′*ηm to calculate the liquid mass flow rate Ql. ### Claim 8 A wet gas flow rate metering device based on a Coriolis mass flowmeter, comprising a Coriolis mass flowmeter, and further comprising a pipe, a flow rate calculation module and a combination of sensors that is mounted on the pipe, wherein: the pipe is for transferring the wet gas; the combination of sensors is for measuring a differential pressure ΔP at an inlet and an outlet in the pipe; the flow rate calculation module performs a multi-physical field coupling calculation, calculates pressure P corresponding to different positions X in a measuring pipe of the Coriolis mass flowmeter, and generates a function curve between the position and the pressure; the flow rate calculation module calculates an average pressure P in the measuring pipe of the Coriolis mass flowmeter through the function curve; calculates an average gas density ρg according to the average pressure P; then calculates a mass liquid content ηm of a mixed medium according to the mixed density ρmix, the average gas density ρg and a liquid density ρl, wherein the liquid density ρl is a constant, specifically comprising: using a formula: η m = ρ mix - ρ g ρ 1 - ρ g * ρ 1 ρ mix ; the flow rate calculation module corrects the total mass flow rate Qm according to the mass liquid content ηm, the average pressure P in the measuring pipe and the medium temperature T to obtain a total mass flow rate Qm′; finally, the flow rate calculation module calculates a gas mass flow rate Qg and a liquid mass flow rate Ql according to the mass liquid content ηm and the total mass flow rate Qm′. ### Claim 9 (depends on 8) The wet gas flow rate metering device based on a Coriolis mass flowmeter according to claim 8, wherein the combination of sensors comprises a pressure sensor and a differential pressure sensor that by measuring the pressure at the inlet of the Coriolis mass flowmeter and measuring the differential pressure ΔP at the inlet and the outlet in combination with the mixed density ρmix, obtain the average pressure in the measuring pipe of the Coriolis mass flowmeter through a computational fluid dynamics CFD model. ### Claim 10 (depends on 8) The wet gas flow rate metering device based on a Coriolis mass flowmeter according to claim 8, wherein the combination of sensors comprises two pressure sensors that by measuring the pressure at the inlet and the outlet of the Coriolis mass flowmeter to obtain an actual differential pressure ΔP in combination with the mixed density ρmix, obtain the average pressure in the measuring pipe of the Coriolis mass flowmeter through a computational fluid dynamics CFD model. ### Claim 11 (depends on 8) The wet gas flow rate metering device based on a Coriolis mass flowmeter according to claim 8, wherein the step of calculating, by the flow rate calculation module an average pressure P in the measuring pipe of the Coriolis mass flowmeter through the function curve comprises: calculating by using a calculus area solving to obtain the average pressure P. ### Claim 12 (depends on 11) The wet gas flow rate metering device based on a Coriolis mass flowmeter according to claim 11, wherein the flow rate calculation module, according to the pressure and the temperature in combination with a PVT equation of a gas phase medium, uses a formula: ρ g ρ 0 = P P 0 * T 0 T to finally obtain the average gas density ρg; and calculates the gas density ρg, wherein P, T are the pressure and the absolute temperature in the measuring pipe of the Coriolis mass flowmeter respectively, ρ0, P0 and T0 are the gas density, the pressure and the absolute temperature in a calibration state respectively. ### Claim 13 (depends on 12) The wet gas flow rate metering device based on a Coriolis mass flowmeter according to claim 12, wherein when the flow rate calculation module corrects the total mass flow rate Qm according to the mass liquid content ηm, the average pressure P in the measuring pipe and the medium temperature T to obtain a total mass flow rate Qm′, a specific correction formula is that Qm′=f(P,T,ηm,Qm). ### Claim 14 (depends on 13) The wet gas flow rate metering device based on a Coriolis mass flowmeter according to claim 13, wherein the flow rate calculation module specifically uses a formula Qg=Qm′*(1−qm) to calculate the gas mass flow rate Qg, and uses a formula Ql=Qm′*ηm to calculate the liquid mass flow rate Ql. ### Claim 15 (depends on 8) The wet gas flow rate metering device based on a Coriolis mass flowmeter according to claim 8, wherein a temperature sensor is provided within a casing of the Coriolis mass flowmeter, and the temperature sensor is attached to the measuring pipe of the Coriolis mass flowmeter.