decrease certain areas of the pad temperature. No longer is
the entire pad overheated just because one area may be a
little colder than the rest. Now it is possible to simply heat
this one area and reduce power to the rest. The result is a
significant saving in heater power consumption and a
reduction in boil-off gas (BOG).
At the time of writing, the tanks were in the process of
being commissioned, but initial estimates from Kogas
suggest a 15% reduction in heater power and an even more
significant reduction in BOG. In a world where cost, waste and
CO
2
emissions are intensively scrutinised, a simple change in
product usage that yields such significant savings is very
welcome.
Going forward, Kogas is looking to retrofit this solution
to existing tanks because the process is simple and can be
carried out while the tank is operational. Fibre can easily be
pushed through the tubes in the base slab and configured to
monitor the temperature while the existing resistance
temperature detector (RTD) system is still operational. New
software is brought online for the fibre system and the
heater control is then switched over whilst being monitored
by the RTDs. Once the fibre system is proven to be working
well, the RTDs are then switched into the new software to
complete the transition. Retrofit installation could be
completed in a matter of weeks with full switch over shortly
after.
This solution could effectively pay for the DTS
implementation in a short period of time, but the same DTS
may already be used for tank leak detection as part of the
health, safety and environment (HSE) system. Therefore, it is
possible to have an HSE system that actually saves the plant
owner money.
Reference
1. Equipment for explosive atmospheres:
.
eu/enterprise/policies/european-standards/harmonised-
standards/equipment-explosive-atmosphere/index_en.htm
Figure 3.
Base slab heater control graphical user interface
(GUI).
Global leader in development, engineering and testing.
Superior Reliability.
Full Range of Cryogenic Pumps.
• In tank, removable pumps for storage tanks.
• Vessel-mounted pumps for process systems.
• Fixed mounted pumps for marine or other applications.
Low total cost of ownership.
No shaft seals - maximize safety, with low maintenance costs.
Unparalleled quality.
Exceptional pump-down capability (low NPSHR).
• Global Headquarters with production and test facilities located in Las Vegas, USA
• Production & Test Facilities in Las Vegas, USA and Tokyo, Japan
• NCI is served by the Nikkiso and LEWA Worldwide network
• Over 1700 units operating in 618 facilities worldwide onshore & offshore
• Pumps for LNG/NGL/LN2/LEG up to 3000 m3/h of flow and up to 3000m of head
• Up to 25,000 hours Manufacturers Warrantee Over 25 years of Engineering Excellence
OVER
25 YEARS
OF ENGINEERING
EXCELLENCE
SUBMERGED MOTOR CRYOGENIC
PUMPS FOR LIQUIFIED GASES
