OPERATION & MAINTENANCE OF POWER PLANTS


dashboard” that showed what the system was doing in real-time.


Te demonstration showcased what


the process would be capable of at full scale. Assuming that steam reforming (SR) facilities can be run at full capacity and deliver the same efficiency, what exactly would this mean for the future of this technology at scale? First, it would represent a shift to more eco-friendly fuels. If formed from renewables, hydrogen itself is a clean-burning fuel that does not create any greenhouse gases. Fuels cells using hydrogen have undergone rapid development in recent years, and such fuels cells are providing an alternative to combustion engines in vehicles. Second, for those cases where


hydrocarbon fuels are still needed, SR facilities represent a way to create those fuels cleanly, and in just the right amounts needed instead of relying on the refinement and shipment of existing fossil fuels in the ground. Tird, it would be another way to tackle


the increasing amount of organic waste that countries produce. Around 140 million tons of solid waste go into our landfills each year – roughly 133 billion pounds of this


Watlow helps Raven SR to streamline energy transformation


is food waste or similar organic waste. If even a fraction of this could be converted to useful fuel, it would make a huge impact on our landfills and the neighbourhoods surrounding them. Transforming waste into fuel is one of the most significant ways to become resource efficient and contribute to the Paris Agreement’s targets. Te work done by Raven SR is a crucial step in achieving clean energy and greater energy independence. Not only does the process prevent more waste ending up in landfills, but the company’s products can also be


created locally and delivered directly to petrol stations without the need for long- distance transportation or pipelines. By onboarding Watlow’s sensors, control


architecture and dashboard, Raven SR’s engineers can capture data and use it proactively to keep system efficiency and uptime as high as possible for years to come.


Dennis Long is chief system designer at Watlow. www.watlow.com


ADVANCED VALVE AUTOMATION FOR BIOMASS CHPP A


pproximately 100 AUMA Seven actuators ensure high- performance valve automation at Skærbæk CHPP near Fredericia, Denmark. Originally built for natural gas, the plant operated by Danish energy


company Orsted has recently been converted to dual-fuel cogeneration. The plant provides sustainable district heating for roughly 60,000 households. Two highly efficient 154MW wood chip boilers were installed during the refurbishment. Wood chips are the primary fuel, with natural gas as a backup. Installing the new boilers required new pipelines for water and steam to be installed and linked to the original gas-fired plant. Around 100 AUMA Seven actuators with Profibus interface were added. The actuators,


AUMA Seven actuators with Profibus interface ensure high-performance valve automation in Skærbæk CHPP near Fredericia, Denmark


which are engineered by AUMA Group company Sipos Aktorik,


incorporate frequency converters that allow their operating speeds to be adjusted during the valve travel. Variable speed offers significant advantages in a wide variety of closed-loop and open-loop control applications, since each change of valve position can be matched to its optimum operating speed. Variable-speed operation also


makes the actuators very versatile, since a single size of actuator typically covers 8 different torque settings and 7 operating speeds. This reduces the number of actuator variants required across the plant, and so simplifies inventory management. Torques and speeds can be adjusted at any time to optimise the process or accommodate process changes. l


For more information visit www.auma.com


www.engineerlive.com 21


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