Customer application 23 July 2021
Energy Data Management for Wood-Fired Systems

The energy transition has brought both challenges and also new opportunities. For example, if a wood-fired system also provides process heat, then lucrative subsidy programs can be utilized. The energy data management system which is, among other things, necessary for to apply for subsidies, can be easily realized, as Endress Holzfeuerungsanlagen GmbH has proven.

Garden centers and wood-processing companies, like carpenters, furniture factories or lumber mills, are often presented with the question of how to usefully use their waste wood. Directly generating heat from it can be an efficient and environmentally friendly practice. Endress Holzfeuerungsanlagen in Burgbernheim in Middle Franconia offers suitable technologies for this. Their 25 employees plan and manufacture complete combustion systems that have outputs from 100 to 1000 kilowatts (kW).

“Our wood-fired systems offer an optimal solution anywhere that fuel is produced as a by-product of production,” states Jürgen Ströbel, Control Cabinet Construction Manager at Endress. The companies actually see a doubled profit, “Carpenters, for example, have to pay to dispose of their wood chips. With our wood-fired systems, they save these costs, and simultaneously generate the heat they need in their operations.” Emissions are also far below legally specified limit values. This is achieved using intelligent temperature monitoring, lambda-controlled combustion controllers and newly developed particulate filters in the Endress combustion systems.

Utilizing Numerous Subsidies

Also of interest for operators: they can apply for various subsidies to pay for the installation of the wood-fired system. Grants from the Federal Office of Economics and Export Control (BAFA) can cover up to 35 percent of eligible costs for systems that satisfy technical rule DIN EN 303-5 for solid fuel boilers. If the new system replaces an old oil heating system, then the grant can come out to as much as ten percent higher. “There is also another subsidy if the heat is used both to heat the building and also for process heat,” explains Ströbel. Operators can receive up to 55 percent of the total costs in grants.

This option is offered, for example, to lumber mills and carpenters, where energy-intensive drying systems are operated. However, other operations, in which process heat accounts for more than half of the total heating energy, can also profit from the additional grants. An important prerequisite for this, however, is that an energy management system is installed at the company and is certified according to the ISO 50001 standard.

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Trust in Positive Experiences

Ultimately, Endress had two essential reasons for choosing the WAGO system, “That we could manage things completely without any programming was naturally a positive point in their favor,” says Ströbel. “We have also had many years of positive experiences with the WAGO I/O System 750 in the control and automation technology in our systems.” A 750-890 controller is installed in all Endress heating systems, which is programmed using CODESYS V2.3. It reliably controls all of the functions, from the worm drive for the fuel, through the control of optimal combustion by means of a lambda probe, up to cinder discharge and cleaning of the exhaust air filter.
Suitable input and output cards are available in the WAGO I/O System 750 for all sensors, actuators and components of the heating systems. “If needed, our customers can link the heating system directly into a building control system via Modbus TCP, without needing an additional card,“ explains Ströbel. Endress delivers between 50 and 80 new wood-fired systems to customers each year. WAGO Energy Management is included more often than not.

Text: Dr. Jörg Lantzsch
Photos:
Klaudia Kuhlmann/vor-ort-foto.de
Contact person at WAGO:
Frank Sünkel

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