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Baseload LNG Production in Stavanger - Linde Engineering

Baseload LNG Production in Stavanger - Linde Engineering

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20<br />

Truck unload<strong>in</strong>g at <strong>LNG</strong> satellite station<br />

Trailer load<strong>in</strong>g station<br />

Dur<strong>in</strong>g load<strong>in</strong>g of <strong>LNG</strong> trucks the normal load<strong>in</strong>g<br />

rate per pump is 65 m³/h. Both <strong>LNG</strong> truck load<strong>in</strong>g<br />

pumps can be used simultaneously. The expected<br />

total time for fill<strong>in</strong>g a trailer is close to<br />

one hour, <strong>in</strong>clud<strong>in</strong>g time for connection and<br />

disconnection. The actual fill<strong>in</strong>g time is 45 m<strong>in</strong>.<br />

At simultaneous fill<strong>in</strong>g of two trailers, the total<br />

<strong>LNG</strong> flow rate is 150 m 3 /h. Thus, with the two<br />

fill<strong>in</strong>g stations operat<strong>in</strong>g <strong>in</strong> parallel, theoretically<br />

some fifty trailers could be filled every 24 hours.<br />

Boil-off gas system<br />

Two boil-off compressors, each with 100 % capacity,<br />

are <strong>in</strong>stalled at the term<strong>in</strong>al. The ma<strong>in</strong><br />

task is to evacuate excessive boil-off and displacement<br />

gases <strong>in</strong> order to keep the pressure<br />

<strong>in</strong> the storage tank with<strong>in</strong> acceptable limits.<br />

The compressed gases are diverted to the recondenser.<br />

Re-condenser and <strong>LNG</strong> buffer tank<br />

In order to enhance the flexibility of the term<strong>in</strong>al<br />

output, a recondenser with buffer tank is<br />

<strong>in</strong>stalled. The recondenser converts the compressed<br />

boil-off gas to <strong>LNG</strong>. The <strong>LNG</strong> is delivered<br />

to the ref<strong>in</strong>ery gas system or to trailers. The<br />

buffer tank <strong>in</strong>creases the amount of converted<br />

BOG s<strong>in</strong>ce <strong>LNG</strong> can be stored at occasions with<br />

low consumption, e.g. between trailer fill<strong>in</strong>g<br />

when the ref<strong>in</strong>ery is down.

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