Geothermal Steam Pressure Monitoring

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Introduction

ISA 100 WirelessGeothermal 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.

geothermal steam

Benefits

  • Reduced installation cost (CAPEX), high gain antennas allow remote monitoring up to 5km
  • Improved future flexibility & scalability with ISA100 Wireless open and scalable network design
  • Minimized infrastructure with long battery life (10 years with 30sec updates), reduced maintenance costs and effort based on flexible device functionality
  • Reduced patrol rounds by monitoring steam pressure measurements located 2km away from control room

Requirements

To replace existing pressure gauges on production wells with wireless pressure transmitters for online monitoring back at the local control room which can be relayed to operations. Measurement points are located in dense forest where the terrain slope is 1:20 which increased the difficulty of wireless communication.

Challenges

  • Long Communication Range in dense forest
  • Antenna propagation angle
geothermal pressure gauge

Solution

The YFGW710 was installed neat the control room, fitted with a 6dBi antenna to enable the long communication hop to the steam extraction points. The YTA510 wireless temperature transmitter also was fitted with a remote high gain antenna to act as a repeater in order to extend the coverage of the measurement points. The EJX110B wireless pressure transmitters were directly mounted at the required measurement points. Remote antenna cables were used for Sky Mesh approach to avoid forest obstacles with angled antennas for sloping signal propagation to match the grade of the environment.

Conclusion

  • High gain antenna provided exceptional performance where only one repeater could achieve reliable communication with gateway covering the required distance.Frost & Sullivan 2014 Best Practice Award
  • Field patrol interval was extended from daily monitoring to monthly in order to verify the site status and security.
  • The wireless network enabled easy expansion of additional wireless measurement points.

Yokogawa has a proven track record of delivering reliable, scalable and open technologies for a century. ISA100 wireless solutions address the specific challenges of the industrial automation industry while lowering cost ownership for our end users and maximizing their return on the investment.

Industries

  • Geothermal Power

    Environmentally friendly and stable geothermal energy can generate electricity throughout the years regardless of weather conditions. Yokogawa has participated in dozens of geothermal power projects in Japan, Southeast Asia, Africa and other regions, providing a variety of measurement and control technologies.

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  • Power

    In the mid 1970s, Yokogawa entered the power business with the release of the EBS Electric Control System. Since then, Yokogawa has steadfastly continued with the development of our technologies and capabilities for providing the best services and solutions to our customers worldwide.

    Yokogawa has operated the global power solutions network to play a more active role in the dynamic global power market. This has allowed closer teamwork within Yokogawa, bringing together our global resources and industry know-how. Yokogawa's power industry experts work together to bring each customer the solution that best suits their sophisticated requirements.

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  • Renewable Energy

    Renewable energy helps protect the environment and brings both society and industry closer to the goal of achieving sustainability. However, compared to conventional energy sources, there are certain challenges that stand in the way of its rapid adoption, such as higher production costs and greater instability in the supply of power to the grid. As a leading company in the control and instrumentation business, Yokogawa has always striven to help its customers in various industries achieve stable operations and improve productivity in their plants. We provide solutions for renewable energy applications worldwide, thus contributing to the sustainable development goals.

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Related Products & Solutions

  • YFGW710 Field Wireless Integrated Gateway

    YFGW710 Field Wireless Integrated Gateway comply to the wireless communications standard ISA100.11a for industrial automation of International Society of Automation (ISA), and relays ISA100 Device data to the system via integrated backbone router. Single unit of YFGW710 has integrated functions of backbone router, system manager, security manage, and gateway.

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  • YTA510 Wireless Temperature Transmitter

    The high performance temperature transmitter YTA510 accepts Thermocouple, RTD, ohms or DC mill volt inputs. The transmitters transmit not only process variables but also the setting parameters using wireless signal. The transmitters run on internal batteries, and the installation cost can be decreased since hard-wiring is not required. The communication is based on ISA100.11a protocol specifications. 

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  • Field Wireless

    The flexibility of wireless solutions enables less investment in infrastructure while providing greater insights into plant operations.

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