Bürkert multiCELL 8619 shines at Spanish solar project

Solar power projects require a careful blend of design, manufacturing and instrumentation expertise in order to reach their full potential. For one particular solar project in Spain, a range of high performance instrumentation from flow control giants, Bürkert, was chosen ahead of any other for their reliability and efficiency. Find out how Bürkert’s products shone in this case study from PIF.

Solar project uses treated groundwater

This Spanish solar-thermal plant uses parabolic-through concentrating solar power (CSP) technology. Parabolic mirrors direct the sun’s rays to a glass collector, through which oil flows and gets heated up to around 400ºC. The hot oil is then used to turn water into steam, which is used to drive a turbine that turns the generator.

In this case, the plant has two 50 MW generators and the water used in the process is groundwater. All of the impurities need to be removed before it can be used to power the turbine. Otherwise the impurities would gradually build up on the turbine blades, leading to corrosion and possible imbalance of the rotor.

In addition, the purified water is used to clean the mirrors regularly. If this was done with untreated water the mirrors would suffer from a build-up of contaminants, which would reduce the efficiency of the energy collection process.

Bürkert assists with reverse osmosis system

To meet the water quality requirements of the solar plant, a treatment process using reverse osmosis was proposed to remove the impurities from the water supply. The tier 1 contractor, responsible for overseeing this solar power project employed a systems integrator to deliver the reverse osmosis process. For its part, the systems integrator approached Bürkert for assistance with the design and implementation of the control system.

The reverse osmosis equipment is designed and manufactured in a skid format that simplifies the installation process and reduces the amount of time required on site. Implementing a fluid control system successfully requires a number of objectives to be met. From the measurement and control of the technical parameters to the visualisation of the process itself.

Bürkert multiCELL 8619 controller streamlines processes

Bürkert designers worked closely with the systems integrator to create a simplified yet flexible solution based around the Type 8619 multiCELL controller. One of the key benefits of the Bürkert multiCELL is the ability to deal with up to 6 channels of data, which reduces the total number of displays required throughout the installation.

At the time of the design, the Bürkert multiCELL was the only controller capable of displaying flow measurements as well as analytical data, such as conductivity, redox, pH and temperature. The Bürkert Type 8619 can be configured to display any combination of these parameters depending on the needs of the installation.

Furthermore, once the Bürkert multifunction controller has been programmed, all the settings can be transferred to a memory card and then uploaded onto any number of similar devices. This project required two identical skids and this feature reduced the amount of time required for the setup of the second skid. This has significant benefits for OEMs, minimising any errors between builds, removing the need for programming technicians for every unit and increasing productivity.

Bürkert sensors minimise suppliers

Bürkert’s wide range of products was an important factor for the integrator, reducing the number of suppliers and the number of processes required to complete the project.

In all, the project incorporated 12 Type 8619 multiCELL units, as well as 18 Type 8200 probe holders (8200s provide a sealed fixed mount for a range of 120mm analytical probes), used in this instance to measure pH, oxidation-reduction potential (ORP) and temperature. In addition, 16 Type 8030 paddle wheel flowmeters, 36 pressure sensors and 18 temperature sensors were also sourced from Bürkert, along with two pneumatic control cabinets and Type 8640 valve islands.

Ruben Nalda, Area Sales Manager for Bürkert in Spain, explains: “The project integrators expressed considerable satisfaction with the Bürkert solution, feeling that it offered a very cost-effective and flexible approach, supported by high quality and reliable sensors.”

For more information about the Bürkert multicell 8619 or full range of Bürkert sensors, please contact Bürkert today.