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Emerson Process Management’s Smart Wireless Technology Validates Crude Oil Temperature Monitoring in Storage Tank Protection Systems at BP Dalmeny Terminal, UK

Emerson’s Smart wireless temperature transmitters have been installed at BP Exploration’s Dalmeny onshore terminal

Wireless technology reduces installation cost for floating roof temperature measurement application and establishes communications network for future expansion

Emerson Process Management's trådløse temperatursender er installeret på BP Exploration's Dalmeny onshore terminal. Når det nye trådløse netværk er på plads, bekræftes det, at det eksisterende tankbeskyttelsessystem er i stand til at yde den nødvendige beskyttelse.

Dalmeny, located near Edinburgh, UK, has the capacity to store about four million barrels of stabilised crude oil from the Forties oil field. Eight interconnected storage tanks, 40-50m in diameter, are used to regulate the flow of oil between production wells and the tankers or pipeline that will transport it to the refinery.

BP måler allerede olietemperaturen ved siden af ​​tankene. Men på grund af tankens størrelse var der bekymring for, at der kunne være en betydelig forskel mellem temperaturer ved kanten af ​​tanken og i midten. Der var derfor behov for en række målinger for at bekræfte temperaturforskelle. Dette frembragte en udfordring, fordi tankene skulle forblive i brug, hvilket gjorde det umuligt at installere temperaturprober.

An out of service tank with no existing temperature measurement in place presented the perfect opportunity to install the necessary instrumentation. However, there was no cabling infrastructure in place for this specific tank so if BP had installed wired transmitters they would have also had to install a cable recoil system to cope with the floating roof. This would have cost over £15,000.

Wireless presented a cost effective alternative, and having successfully applied Emerson’s Smart Wireless technology to monitor wellhead annular pressure at its Wytch Farm site, BP was confident that it would be suitable for this application.

“We were keen to install a wireless infrastructure that would enable us to expand and add additional devices beyond this application without the need for additional cabling infrastructure and the cost associated with it, “ said Robin Hamill, electrical instrumentation engineer, BP Exploration Operating Company. “Having reviewed the wireless technologies on the market, we felt Emerson’s Smart Wireless was the best solution.”

Two Rosemount® wireless temperature transmitters were installed, one in the centre and one two thirds across to determine if there was a difference in temperatures throughout the tank. A further transmitter was installed on the main inlet feed. The transmitters are located roughly 300m from a Smart Wireless Gateway positioned on the outside wall of the control room. Using a serial connection, data is fed from the gateway into the existing SCADA system.

Using the data from the Smart Wireless transmitters, BP discovered that there was not a significant difference in temperature at different points in the tank.

“Using Smart Wireless we were able to quickly and cost effectively install the temperature measurement equipment required.” said Hamill “The results we have obtained mean that we have not needed to add additional devices to the other tanks.”

BP fortsætter med at måle råolietemperaturer i tanken ved hjælp af Smart Wireless-enhederne. De trådløse sendere er en del af et netværk, der bruger selvorganiserende teknologi. Som led i netværket blev to yderligere trådløse sendere placeret på strategiske positioner inden for anlægget til at fungere som repeaters. På trods af den lange afstand kommunikerer alle enheder direkte med gatewayen snarere end via repeaters. De ekstra sendere øger pålideligheden af ​​netværket ved at tilbyde flere veje til dataene til at rejse til gatewayen, hvis en sti bliver blokeret. Det selvorganiserende trådløse netværk justeres automatisk for at rute signaler rundt om eventuelle forhindringer, hvilket resulterer i større end 99% kommunikationssikkerhed. Den resulterende trådløse infrastruktur gør det muligt hurtigt og nemt at tilføje yderligere trådløse instrumenter.

"Vi har været meget imponerede over Smart Wireless-teknologien og betragter installationen som en stor succes," sagde Hamill. "Denne side oplever ekstreme vejrforhold, men det har ikke påvirket pålideligheden overhovedet."

Installing the Smart Wireless devices was very easy. It took only a day to complete the entire project including configuring the serial link to the SCADA system. Emerson’s AMS™ Suite predictive maintenance software is used to manage the wireless network. Since the wireless network was installed it has been extremely reliable with no data lost.

SmartWireless is an extension of PlantWeb® digital architecture that offers solutions for field instrumentation and plant operations. In addition to the products installed at the Dalmeny terminal other wireless products include Fisher® position monitors, Rosemount Analytical devices and Machinery Health™ Management transmitters, and native wireless interfaces to Ovation® digital automation systems, and SmartStart® services.

For more information about Smart Wireless, visit www.EmersonProcess.eu/SmartWireless, and for videos about growing end-user applications go to www.EmersonSmartWireless.com/Videos.

For yderligere information kontakt venligst;

Emerson Process Management
Blegistrasse 21
6341 Baar
Schweiz

E-mail: [Email protected]
Web: www.EmersonProcess.eu

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