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Geothermal Power

Geothermal energy can generate a stable supply of electricity throughout the year because it is not dependent on weather conditions. Also, as no fuels are burned aboveground and only extremely small amounts of carbon dioxide are released, it is environmentally friendly. To date, Yokogawa has participated in 30 geothermal power generation projects in Japan, Southeast Asia, and other regions, providing a variety of measurement and control technologies that enhance the reliability and maintenance efficiency of geothermal power generation systems.

Customer Challenge

Preventing corrosion that occurs when using a device in a corrosive atmosphere

Solution

The printed circuit boards that go into Yokogawa’s integrated production control systems all receive a hydrogen sulfide-resistant coating, and an anti-corrosion coating is applied to all Yokogawa field devices.

Enabling Technologies

EJX/EJA Series Pressure Transmitters/Differential Pressure Transmitters

DPharp series digital pressure transmitters use a differential pressure high accuracy resonance pressure (DPharp) sensor that represents one of the most revolutionary advances in transmitter technology.


YTA Series Temperature Transmitters

YTA series temperature transmitters convert sensor inputs to a 4 to 20 mA, HART, or FOUNDATION™ fieldbus signal; this eliminates the drawbacks of wire resistance and signal noise that are often experienced with conventional temperature instruments.


Wireless Transmitters: EJX B Series, YTA510, YTMX580

The flexibility of a wireless solution reduces infrastructure costs and enables the installation of transmitters in locations that previously were previously too difficult or prohibitively expensive to wire.


FLXA21 Modular 2-wire Liquid Analyzer

The FLXA21 is a next-generation modular liquid analyzer that can be flexibly configured to measure pH/ORP, contacting conductivity, inductive conductivity, and dissolved oxygen. The FLXA21 also supports the installation of up to two sensors of the same type, thereby reducing installation costs and saving space.


PRM Plant Resource Manager

Plant Resource Manager (PRM) makes predictive maintenance easy. Early detection of system and device malfunctions helps prevent catastrophic failures.

 

Customer Challenge

Reliably performing the remote monitoring and control of facilities such as steam wells and reinjection wells that are located at a considerable distance from a geothermal power plant

Solution

Yokogawa installs remote I/O modules and utilizes a fiber optic redundant ring topology to ensure reliable communications between the integrated production control system and field devices. Wireless field devices are used in difficult to wire locations.

Enabling Technologies

STARDOM Network-based Control System

Dual redundant and low-power configurations are available for the STARDOM hybrid PLC/intelligent RTU. STARDOM supports HART, Modbus, FOUNDATION™ fieldbus, and other network protocols.


FAST/TOOLS SCADA

The FAST/TOOLS package optimizes performance for renewable energy applications. It ensures high availability and performance and supports online configuration.


Wireless Transmitters: EJX B Series, YTA510, YTMX580

The flexibility of a wireless solution reduces infrastructure costs and enables the installation of transmitters in locations that previously were previously too difficult or prohibitively expensive to wire.

 

Customer Challenge

Efficiently maintaining equipment that is located at a considerable distance from a geothermal power plant

Solution

Yokogawa’s Plant Resource Manager (PRM) is an integrated device management software package that enhances maintenance efficiency by making it possible to remotely monitor the status of devices and make changes to their settings. This minimizes the amount of time workers need to spend at geothermal sites for troubleshooting and other tasks, and thus minimizes their exposure to hydrogen sulfide gas, which, in sufficiently high concentrations, can present a health risk.

Enabling Technologies

PRM Plant Resource Manager

Plant Resource Manager (PRM) makes predictive maintenance easy. Early detection of system and device malfunctions helps prevent catastrophic failures.


CENTUM VP Integrated Production Control System

The CENTUM VP integrated control system secures interruption-free “uptime only” plant performance for optimal productivity and profitability in the renewable energy field.


STARDOM Network-based Control System

Dual redundant and low-power configurations are available for the STARDOM hybrid PLC/intelligent RTU. STARDOM supports HART, Modbus, FOUNDATION™ fieldbus, and other network protocols.


FAST/TOOLS SCADA

The FAST/TOOLS package optimizes performance for renewable energy applications. It ensures high availability and performance and supports online configuration.

 

Geothermal Power Generation Process

A steam well is dug to draw fluid comprised of steam and hot water from a geothermal reservoir located deep underground. The fluid mixture is introduced to a steam separator that removes the moisture from the steam, and the steam is then used to drive the turbine of an electricity generator. Low-temperature steam discharged from the turbine is passed through a steam condenser to return the water vapor to a liquid state, and the water is then returned to the underground reservoir by means of a reinjection well.

Control and Measurement Technologies

Plant-wide Systems and Instrumentation

Information

  • Operation support
  • Operation training
  • Plant asset management

Control

  • Integrated monitoring and control
  • Safety instrumentation
  • Remote monitoring and control
  • Wireless communication

Measurement

  • Flow rate
  • Pressure
  • Liquid level
  • Temperature
  • pH
  • Conductivity
Processes
Fluid Transportation Main Geothermal Power Turbine
  • Separator water level control
  • Separator pressure control
  • Hot water return pump control
  • pH control
  • Steam production well/ injection well remote monitoring and control
  • Steam pressure control
  • Emergency vent valve operation
  • Main turbine control
  • Condenser level control
  • Cooling water control
Overview:

Aboitiz Power Corporation is a holding company that was set up by the Aboitiz Group to oversee its investments in power generation, distribution, retail, and services. The company owns and operates several hydroelectric and geothermal power plants as well as a number of non-renewable power facilities throughout the Philippines. It also owns distribution utilities that are centered in high-growth areas in Luzon, Visayas, and Mindanao.

Overview:
  • Operator intervention during the automated plant and turbine startup and shutdown processes is minimized
  • Greatly reduces operator work load and errors, and mitigate thermal and physical stress on the turbine
Overview:

Facing serious environmental problems for the whole earth, clean energy using solar, wind, geothermal, tidal, etc... to reduce CO2 emissions is an inevitable matter. Renewable energy providers need economical/reliable/efficient solutions. Yokogawa provides a reliable data acquisition system with high accuracy for measurement and control instruments.

Overview:

Hot rocks and water come together in select areas to produce renewable energy. CX2000s networked to US/UP controllers provide primary control with distributed backup control for steam turbines.

Overview:

Geothermal power plants create electricity from geothermal energy. These power plants are similar to other steam turbine station; however their heat source is that of the earth's core. The created steam is used to turn the turbine for the production of electricity. Technologies include Dry steam, Flash steam and Binary cycle power stations with Binary cycle being the most common geothermal plant in current production. In the process of geothermal power generation the facility needs to monitor various processes, as in this case steam line pressure sits in remote from control room's location.

Overview:

Recently, there is an increasing demand for operation and monitoring of all the various controllers distributed in the field on the same screens to improve plant operation efficiency. The purpose of the Unified Gateway Station (UGS) is to connect external controllers, such as the STARDOM's FCN/FCJ autonomous controllers and other vendors' controllers, to the CENTUM VP integrated production control system and to operate and monitor those external controllers on the Human Interface Station (HIS) screens, the operation and monitoring screens for the CENTUM VP.

Overview:

The worlds of process automation and production management have been converging for some time. What once used to be islands of automation and production management functionality connected through highly proprietary integration schemes that were costly to maintain have developed into integrated platforms that provide seamless data exchange between the world of automation and the plant floor, the functions of production and operations management, and integration with business level systems.

Overview:

Process automation end users are under more pressure than ever to do more with less. The current economic climate means that many automation capital projects are on hold. With capital budgets tighter than ever, users instead focus on operational budgets (where cost cutting is also a key concern), or on automation investments with a very rapid return on investment.

Overview:

Yokogawa has come a long way in making its message clear to the world of process automation. Last year, the company embarked on a full-scale global marketing campaign to make customers aware of the company's focus on system reliability, security, dependability, and robustness. Dubbed "Vigilance", the campaign created a unified message for the company and greatly helped expand awareness of the Yokogawa brand and corporate philosophy.

Overview:

The automation suppliers that will be successful in the long term will be those that effectively address application or industry specific problems for end users with a value proposition that cannot be ignored. These problems exist throughout the process industries today, and they won't be solved by simply offering a product, but through a combination of hardware, software, services, application expertise, and knowledge.

Overview:

In ARC's view, customers need a compelling business value proposition to justify investment in any kind of automation. Vigilance and VigilantPlant were created with this in mind. Yokogawa's vision with VigilantPlant is to create an environment where plant personnel and operators are well informed, alert, and ready to take action. 

Overview:

In today's dynamic industrial marketplace, the only constant is change. Raw material costs, energy costs, market demands, environmental and safety regulations, technology, and even the nature of the labor force itself are constantly changing, and not always in predictable directions.

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