CENTUM CS 3000 Ensures Stable Supply of Electricity and Steam to Bangkok's Suvarnabhumi Airport

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Executive Summary

District Cooling System and Power Plant Co., Ltd. Samutprakarn, Thailand
District Cooling System and Power Plant Co., Ltd.
Samutprakarn, Thailand

District Cooling System and Power Plant Co., Ltd. (DCAP) operates a power plant near Bangkok's Suvarnabhumi International Airport that supplies electricity and steam to the Bangkok International airport main terminal, hotel nearby and a Thai Airways catering facility. The DCAP plant has two 41 MW gas turbines, two heat recovery steam generators (HRSG, 80 t/h each), and one 12 MW steam turbine. In avaerage, 50 MW electricity is transferred to the Airport of Thailand (AOT) , Total left MW is utilized in this facility and 30 MW is selling to the national grid (EGAT). The steam is sent to 10 steam absorption chillers located at the airport's main terminal, east and west, about 2 km away from DCAP facility.

To be a steady supply of electricity and steam to Suvarnabhumi International Airport, which operates 24 hours a day / 365 days around a year, is most important issue for DCAP. Yokogawa Thailand successfully installed CENTUM CS 3000 distributed control system, field transmitters and magnetic flowmeters. The facility is in operation without any problem since 2004.

Process overview

Process overview

The Challenges and the Solutions

1. Steady and safe supply of power and steam

DCAP's mission is to ensure a steady supply of electricity and steam to the airport terminal, an adjacent hotel, and a Thai Airways catering facility. The steam is supplied to steam absorption chillers at east and west of the airport terminals that drive the cooling systems at the airport complex and the airline catering facilities. The airport receives power over a main line from the DCAP power plant and a line from the Metropolitan Electricity Authority (MEA). There are four operation modes to meet any cases for power requirement and steam requirement situations.

  1. Full operation including steam chillers
  2. Half operation including steam chillers
  3. Half Block + Steam Chiller operation
  4. Aux. Boiler + Steam chiller operation

All correct operation procedures are carefully configured in the CENTUM CS 3000 and smoothly in operation. Gas turbine control system and steam turbine control system ,each machine vendor has their own specific controller, so only some major setting data are transferred from CENTUM CS 3000 as a master set point through modbus interface. All process data are monitored in CS 3000, too. A safe and steady supply of electricity and air conditioning to the entire airport complex is thus assured year round.

Central control room

Central control room

Central control room2

Central control room

2. Environmentally optimized operations

Natural gas supplied by PTT powers DCAP's main gas turbines and auxiliary boilers. Even though natural gas is low in emissions, the CENTUM CS 3000 system tracks and displays the relevant process data. The data are linked to a continuous emissions monitoring system (CEMS) through a plant network that is connected to the government's systems. Data on NOx, SO2, CO, O22, and opacity are sent twice a day. The water used in this plant is also carefully monitored and controlled to keep it within recommended limits.

Continuous emissions monitoring system
Continuous emissions monitoring system

Customer Satisfaction

Seree La-Ongutai, acting general manager, said, "We are producing electricity and steam for the whole airport terminal, the adjacent hotel and the Thai Airways facilities. It is very hot in Thailand all through the year, so the airport always needs a stable utility. We very much appreciate the reliability of Yokogawa's CENTUM CS 3000, which is the cooling of all our airport facilities here. So far the plant has operated with great stability, availability and safety, and I believe this is due in good part to the integration of the system's sequence logic functions and the dynamic graphic displays on the human machine interface (HMI). We are striving to save energy in the whole facility, so we would like to work together with Yokogawa for continuous improvement."

Plant details
Gas turbines: 41MW x 2, IHI
Steam turbines: 12 MW x 1, Shin Nippon
Steam absorption chillers: 21,000 RT (Refrigerant Tons)
Electric chillers: 12,480RT(Refrigerant Tons)
Steam generation: 80 t/h
Steam temperature: 430 deg C
Steam pressure: 60 bar

System delivered
Distributed control system: CENTUM CS 3000
Total I/O: 1841
Field devices: Yokogawa magnetic flowmeters


  • 열병합발전

    열병합발전 (CHP)은 단일 연료 공급원에서 전력 및 열에너지를 생성하는 효율적인 방법입니다.

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  • 전력

    1970년대 중반, Yokogawa는 EBS 전기 제어 시스템 (EBS Electric Control System)의 출시와 함께 전력 사업에 진출했습니다. 그 이후로 Yokogawa는 전 세계 고객에게 최상의 서비스와 솔루션을 제공하기 위한 기술과 역량의 개발을 꾸준히 지속해 왔습니다.

    Yokogawa는 역동적인 글로벌 전력 시장에서 더욱 적극적인 역할을 수행하기 위해 글로벌 전력 솔루션 네트워크를 운영했습니다. 이로 인해 Yokogawa 내에서 보다 긴밀한 팀워크가 가능해져서 글로벌 리소스와 업계 노하우를 하나로 모았습니다. Yokogawa의 전력 산업 전문가들은 각 고객에게 정교한 요구 사항에 가장 적합한 솔루션을 제공하기 위해 협력합니다.

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Related Products & Solutions

  • 분산 제어 시스템 (DCS)

    Yokogawa는 프로세스 자동화를 위해서 중요한 운영 인프라를 제공합니다. 분산제어시스템(DCS)은 플랜트 또는 산업 공정의 자동화 된 제어 및 운영을 위한 플랫폼입니다. 10,000개 이상의 플랜트에서 고객의 생산 목표 달성하기 위해서 Yokogawa DCS가 적용되었습니다.

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