• HoSt Group_Combustion plant
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Renewable heat for Lelystad

Renewable energy from pruning wood

Lelystad is enriched with a bioenergy heating plant. This is not just a bioenergy plant. It is the best of the Netherlands when it comes to CEO Rene Buwalda of Primco, part of investment company Momentum Capital. HoSt turn-key supplied the wood-fired installation in October 2018. Since then, the performance exceeds expectations.

“I believe in a well balanced mix of alternative and cleaner energy sources to ensure a technical and economical feasible energy conversion, which leads to a more and more energy independence of the Netherlands”, says Buwalda. Annually, 21,000 tonnes of wood waste (prunings), originating from necessary forest maintenance in the area, is combusted and converted into heat for the district heating network.

Reliable heat supply

No fewer than 5,000 homes and 6 large energy consumers in Lelystad are now independent of natural gas. And when the heat demand suddenly increases, more renewable heat can be supplied immediately and briefly thanks to the heat buffers. Buwalda: “Weather conditions are becoming increasingly unpredictable and boisterous and lead to more and higher expectations of an installation at any level. This installation performs optimally and consistently under all weather conditions. Together with HoSt, we make the impossible possible and therefore I dare to say that we have the best biomass energy installation of the Netherlands”.

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Above expectations

The expert team of HoSt and a healthy dose of bravado from Buwalda resulted in a familiar dialogue. That proved to be the perfect ‘recipe’ for a short construction period and a quick commissioning. The traditional employer-employee, or contractor-customer, role faded in the best sense of the term. As result, the entire project went very smoothly and swiftly allowing us to celebrate the usual first-fire already in October, less than six months after the start of the construction. Within the first three months we already booked profit, thanks to the high heat demand that we were also actually able to supply. All our expectations have been exceeded”, says Buwalda

“The traditional employer-employee role, or contractor-customer role, faded in the best sense of the term. As result, the entire project went very smoothly and swiftly allowing us to celebrate the usual first-fire already in October, less than six months after the start of the construction. Within the first three months we already booked profit”.

Low-load operation is favorable

Being able to run low-load condition operation is beneficial both for the district heating of Lelystad and for the business model of Primco, an invester who wants to commit to multiple renewable energy installations. Where the installation has a maximum capacity of 15 MWth in total, low-load operation is no problem at all. The setup can be best compared with identical twins: two identical boilers, furnaces and infeeders. Each boiler is able to run independently from the other and even at 30% partial load. As a result, in the warmer months: 2.5 MWth production by one boiler instead of zero on the counter. Buwalda: “We have our stakeholders’ best interests at heart, which why it is very attractive that we can even produce heat in the months that don’t have the letter ‘r’ in their name. Partly thanks to our stakeholders, realization on the installation was made possible”.

Annually, 21,000 tonnes of wood waste (prunings), originating from necessary forest maintenance in the area, is combusted and converted into heat for the district heating network.

The heat will be supplied, through the district heating network, to as many as 5,000 small-scale consumers and 6 large energy consumers.

Thanks to the bag house filter and extensive cleaning technology (urea injection), the installation has guaranteed low dust- and nitrogen dioxide emissions (dust: <5mg/Nm3 and NOx: <145/Nm3).

Thanks to this renewable heat production, around 7.5 million Nm3 of natural gas is saved, which contributes positively to the renewable energy transition.

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