There are various types of Ejectors that may require a performance test or a FAT (Factory Acceptance Test):
At our unique test facility in the UK, Transvac has the capability to performance test, FAT (Factory Acceptance Test) and demonstrate liquid motivated Ejectors for Flare Gas Recovery, Gas Compression, Subsea Processing, Produced Water handling and similar applications.
Many clients have witnessed performance tests at Transvac’s Test Facility including Saudi Aramco, ExxonMobil, Oxy, Equinor, Shell, Petrobras, FMCTechnip and others.
Because we do not have access to fluids with the same compositions and physical properties as the actual gases used for gas-gas applications, it is not possible to carry out a meaningful performance test on a Gas-Gas Ejector. The most appropriate way to performance test a Gas-Gas Ejector is to carry out a test on-site (SAT), after installation, under actual site conditions.
A “functional test” could theoretically be carried out at Transvac using air as the motive medium. However, this is not recommended because:
There is an ASME Code which covers Ejector performance tests, reference ANSI PTC 24 1976, but it does not cover cases where the actual motive gas is substituted by a different more easily obtainable test gas.
Because it is not practical to performance test Gas-Gas Ejectors, Transvac can offer as an alternative CFD (Computational Fluid Dynamic) performance test study.
The methodology used is proven and has been accepted by many clients who have found the data provided useful for design and off-design cases as well as for HAZOPs.
It is not practical to physically performance test Liquid-Liquid Jet Mixers because we cannot replicate the fluids involved or provide appropriate mixing Tanks.
Where the mixing quality throughout a Mixing Tank is critical to a process, for instance to achieve a certain pH level, homogeneity or temperature, Transvac can perform a CFD (Computational Fluid Dynamics) analysis to optimise a Jet Mixer System arrangement by:
Most multiphase Ejector tests are performed using water as the motive and suction fluid at full operating pressures for each specific application with air introduced to change the liquid-to-gas ratios.
Various factors are applied, if required, to correct the resulting performance data for different fluid compositions. The methodology used for data correction has been proven by physical testing, using different fluids, operating experience all supported by CFD (Computational Fluid Dynamics) validation studies.
Performance tests can be completed using Single-Nozzle or Multi-Channel Ejectors according to the application flow requirements.