This report details the results from two controlled release test campaigns conducted as part of activity A2.2.8 of MetCCUS.
The first part of the report covers the execution and results gathered from a controlled release campaign to replicate site-scale emissions of CO2. The work was conducted at the Centre for Dairy Research (CEDAR), Reading, UK, in November 2024, and evaluated the performance of the tracer dispersion technique for quantifying large spatial and large emission rate releases.
The second part of this report presents work undertaken in May 2025 at NPL, which involved replicating CO₂ leaks at the component scale. Controlled releases of carbon dioxide were performed on two test rigs to assess the performance of various detectors and to quantify known CO₂ release rates using the Bacharach Hi-Flow sampler in combination with the AERIS analyser. Measurements were conducted using Optical Gas Imaging (FLIR G343), a passive handheld detector (Sefram 9825), high flow sampling (Bacharach Hi-Flow with AERIS CO2/N2O analyser.
