Requirements to the Client of the Large Scale CO2 Plant in Bldg. 158

Requirements to the client of the Large Scale CO2 plant in Bldg. 158

To connect a client test system (later on called the “experiment”) the CO2 Large Scale Plant delivers CO2 in sub-cooled liquid conditions with:

- Mass flow rate of 0.5 g/s up to 15 g/s,

- Saturation temperature Tsat between -27°C and 25 °C,

- Saturation pressures corresponding to Tsat mentioned before,

- Vapor qualities can be varied by the experiment from 0.05 to 1.

Demands on the client/experiment:

- Consideration of the building dimensions, mainly the maximum height,

- Connection to the system via the Swagelok connectors imperial size ¼” (d=6.35 mm) or

VCR ½” connections (flexible connection have to be provided by the client),

- The experiment must be tested to a max. pressure of 120 bar, because the safety valves in the system are adjusted to 96 bar. (safety factor of 1.25)

- In case of lower withstand pressure => contact the CO2 cooling team to check possible modifications sufficiently in advance,

- The experiment should be insulated, preferred: insulation vacuum with p<1*10-3 mbar,

- In case of vacuum insulation the vessel must have a relief valve at p=100 mbar over pressure,

- Any other vessel etc. enclosing CO2 installation must have a safety relief valve at p=100 mbar,

- this safety valve should be dimensioned such that a rupture of a CO2 line in the experiment and the following blow out of CO2 can pass the safety valve avoiding a pressure built up in the vacuum enclosure,

- The experiment should be leak tested to the environment with a leak rate <10-4 mbar*l/s,

- The experiment should be equipped with:

Ø  a J-T valve or capillary at the entrance Δp=5 bar to 50bar,

Ø  a temperature sensor and a pressure sensor at the entrance,

Ø  remote control of the heat input at the test section => PLC controled via plant

Ø  a compensation heater after the test section that keeps the overall heat input constant.

- The experiment must be purged 3 times by applying vacuum / pressure p>6 bar of CO2 when connected to the Large Scale Plant, after that the experiment can be connected hydraulically,

- Specifications for the cool down procedure have to be discussed,

- The client has to bring its own data acquisition and analyzing tools,

- Official request to the CO2 cooling team describing the experimental needs.

Contact persons:

-  Jan Godlewski,

-  Hans Postema,

-  Johan Bremer.