DEPRESS - Depressurization facility

Facility Location
City & country
Trondheim (Norway)
Sem Sælands vei 11, 7034
Description & contacts of the access provider
Legal name of organisation
SINTEF ER - SINTEF Energy Research
Infrastructure contact - Primary contact
Sigurd Weidemann Løvseth
RICC contact - Secondary contact
Sigurd Weidemann Løvseth
Facility Availability
Unit of access
Availability per year
6 months
Expected duration of single experiment:
Minimum 1 month
Operational or other constraints
Specific risks:
Necessary instructions for operation is important in order to reduce risks, but one experienced person from SINTEF ER will anyhow have to participate. A risk assessment will have to be performed ahead of the introduction of certain gases. Depressurization experiments of pipe is only allowed after work hours and with some wind.
Legal issues
Access to SINTEF ER lab will require acceptance of safety and security policies and training.

To develop, design and operate CO2-transport networks, simulation of transient multiphase flow of CO2 mixtures is necessary, in order to see what happens during start-up, shut-down, depressurization, and varying CO2 supply. Robust simulation of CCS-relevant mixtures is currently not supported by common engineering tools.

This facility is built to support the development and validation of physics-based pipeline integrity models and flow models, and consists of two interconnected installations for depressurization experiments:

  1. A depressurization pipe
  2. A depressurization tank

The pipe is 60 m long and has an inner diameter of 40 mm. Experiments are performed by sudden full bore or constricted opening at one end of the tube. The tank is 1 meter high with an inner diameter of 300 mm. It is depressurized by opening a rapid valve. The maximum pressure rating is 200 bar for the pipe and 150 bar for the tank, and the initial temperature can be controlled between 5 and 40 °C for both. Both the vessel and the pipe are highly instrumented to record rapid changes in temperature, pressure, and phase behaviour.

The installation is constructed on the Gløshaugen campus. After completion and shakedown in 2017 it is booked, but is available for access from 2018.

State of the art, uniqueness, & specific advantages

The pipe has a better and denser instrumentation than any other known depressurization facility, and no other facility we are aware of has the means to directly detect phase behaviour. Care has been made in the design to allow upscaling of models, and to achieve full opening without inducing artificial shock waves. As far as we know, there is no facility available worldwide similar to the depressurization tank.

Scientific Environment

Located in the thermal laboratories of NTNU/SINTEF with its available infrastructures and services and directly adjacent to the offices of leading scientists in the field of SINTEF and NTNU. Further advanced facilities for flow experiments are planned adjacent to this facility.


EC DG Research - RFCS

selected publications