LNG DENSiTy PROFiLE MEASUREMENT SySTEM

The KONGSBERG Density Profile Measurement System is an

extension module to the K-Gauge CTS, allowing the Radar 

Tank Gauge to be used as a combined level gauge and

densimeter. The system offers a world’s first in-situ and online

LNG density measurement system, and comes with built-in LNG

aging tool.

The function both estimates the current LNG composition and

predicts future composition. Gross Calorific Value (GCV) and

the theoretical LNG density value by revised Klosek McKinley

equation..

Functional description

K-Gauge DPMS offers a cost effective way to gain improved

knowledge and information of the LNG stored. Online and

continuous LNG density monitoring and trend functions provide

an added value for the users of the K-Gauge Custody Transfer

Measurement System for LNG carriers and LNG FSRUs.

By use of the KONGSBERG Radar Tank Gauges and stand

pipes installed in the tanks for level gauging, the DPMS soft

ware module provides density monitoring and reporting, LNG

aging calculation and GCV estimation.

For LNG carriers, the LNG density, aging and GCV information

are helpful tools to prepare for the Custody Transfer operation,

and an easy verification when getting the official composition

report from the terminal. For LNG FSRUs the density profile

monitoring and trend function are helpful tools to continuously

monitor the boil-off process and the density and temperature

profile in the tanks to prevent roll-over incidents to happen.

The possibility to accurate measure the density offers a back

up, and verification, to the currently dominating method to de

termine the density in cargoes transferred to/from LNG carriers

and FSRUs.

Aging and the possibility to monitor the profile of density in the

cargo down the tank can help to predict a possible roll-over

accident by improving the decision basis for the operator. The

operator performing cargo operation will, by means of the den

sity information together with level and temperature measure

ment, become better equipped to make the correct decisions to

prevent roll-over accidents.