Emissionsüberwachungssystem MVS 304-EM

KonzentrationGasMess

Measurement of emission quantities with the MVS 304-EMEmission measurement using cover method or drilling methodAccording to the REGULATION OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL on the reduction of methane emissions in the energy sector and amending Regulation (EU) 2019/942 (EU Regulation Methane Emissions), the technical measurement of methane emissions in the operation of gas transmission and distribution networks is required.Drilling methodThe emission quantity measurement using the drilling method serves to accurately record methane emission rates (source level) at identified leak points in the pipeline network. The measured values determined by this emission measurement correspond to the measurement at the leak point in the ground. The measurement setup is shown in the next image.Up to six probes can be connected per MVS 304-EM.In the MVS 304-EM, the flow rate is measured and the concentration in the aspirated gas stream is measured with the gas meter.The achieved negative pressure can be read at each probe.Cover method (High flow sampling)The emission quantity measurement using the cover method serves to accurately record methane emission rates (source level) at the surface. The measurement setup is shown in the next image.This method, using a cover to determine the emission quantity on buried pipelines, is described in OGMP Underground-pipes-TGD-SG-Approved (page 3) and in the EU Methane Regulation page 6 (36) and Article 13 page 25.In the MVS 304-EM, the flow rate is measured and the concentration in the aspirated gas stream is measured with the gas meter. This method is characterized by speed and simplicity in practical field application. The measurement is completed after a short time. The relationship between the measured values determined by this cover method and the measurements directly at the buried pipeline has not yet been determined.If the outflow quantity is required directly at the leak point, this can be measured with the MVS304-EM and a cover cloth to enclose the pipeline after excavation, or with the drilling method and the MVS 304-EM before excavation.Emission quantity calculationFor determining the emission quantity and creating documentation for each measurement, a customer-specific internet portal is available, see illustration. The measured values are entered on site and the images are uploaded. The emission quantity in g/h is calculated and displayed in the portal. The created emission quantity measurement reports are available as PDF files on the mobile phone or desktop PC. Each measurement area can be sent by email from the portal.Emission quantity measurements on systemsHigh-Flow-Sampling (HFS) for pipeline components and system-wide emission quantity measurements.Our HFS cloths are available in several sizes and can be attached gas-tight to fittings, valves, vents, or GRDM systems using circumferential Velcro fasteners. The suction hose is connected via quick couplings, and various sizes ensure that both point sources (e.g., stuffing boxes, flanges, manometers) and larger fittings are fully enclosed. The method corresponds to the industry-established HFS method for the quantitative detection of fugitive emissions.In high-flow sampling, the entire leak plume is aspirated together with ambient air at a high flow rate. Complete sealing/taping as with bagging is not required. On the device side, the total volume flow and methane concentration are recorded and an emission quantity in g/h is calculated.Measurement procedure (practical guide):Attach the cloth as tension-free and draft-free as possible, secure the lacing.Connect MVS304-EM to the quick couplingStart measurement and wait for stabilization, typical individual measurements take a few minutes to ensure stable concentration and flow values.Take photos of the measurement setupUpload data to the portalUse cases and notes from standards:The method is suitable from flanges to GRDM systems and is anchored in European guidelines for methane quantification in gas transmission and distribution networks and storage/LNG (CEN/TS 17874:2022: Identification and quantification of emission-relevant sources, methodological steps). In the context of OGMP 2.0, HFS is recommended as a source/component-level measurement approach for higher reporting levels (Level 4/5). Current Technical Guidance Documents and templates support uncertainty analysis and data management.Quality assurance / Best Practices:Ensure complete detection, choose enclosure size so that the entire outlet is in the suction field, avoid leakage paths by checking complete suction at the edges.Why enclosures with Velcro/quick coupling?The mechanically robust Velcro design enables quick, repeatable sealing on differently shaped units, quick couplings reduce setup time and leak risk when attaching the hose. This allows fast, reproducible HFS measurements to be carried out in the field, an approach recommended for service providers for precise methane quantification.Benefits for network operators: Enclosures and HFS provide source-related, mass-based emission rates with documented accuracy. Directly usable for LDAR prioritization, measure evaluation, and OGMP reporting.MVS 304-EMUp to six suction probes can be operated simultaneously on the mobile vacuum station, alternatively the mat for the cover method can be connected. Various cover cloths are available for measuring at stations or pipelines. Of course, the work for locating the leak point can be carried out with the MVS 304-EM.The handling of the MVS 304-EM is simple and comfortable. A two-stage filter system retains water and dirt. The filter change as well as the cleaning or emptying of the water collection container can be carried out easily and with just a few steps.Technical data MVS 304-EMNominal voltage: 230 V - 50 HzMotor power: 0.5 KWDelivery rate: max 14 m³/hVacuum: approx. 850 mbarWeight: approx. 33 kgDimensions: L x W x H, 32 x 47 x 65 cmFlow measurement: 0-250 l/minScope of deliveryMVS 304-EMA cover mat approx. 1x2mControl certificateOperating instructionsAccessories209.793 probe set 3 pieces209.791 extension suction probe set + 3 pieces (max. 6 probes connectable)204.361 adapter for devices with 20 mm connection coupling204.442 MVS302 telescopic extension kit completeTechnical characteristics / specifications:Nominal voltage: 230 V - 50 HzMotor power: 0.5 KWDelivery rate: max 14 m³/hVacuum: approx. 850 mbarWeight: approx. 33 kgDimensions: 32 x 47 x 65 cmFlow measurement: 0-250 l/minUp to 6 probes connectableTwo-stage filter system for water and dirt retentionEasy filter change and cleaning