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Varied climate

Finland is a country of contrasts, not just in the geographical sense, but also in its climate. Temperatures during the year vary considerably from -30°C in winter and +30°C in the summer. This has a considerable impact upon the country’s energy usage. By using the most advanced technology available, the country and energy companies like TSE strive to produce as much electricity as possible while also generating heat for the population of Finland. Even though the population density is low, Finland’s share of CHPproduction is among the highest in Europe; last year reaching 28 percent of the total electricity consumption in the country and accounting for one third of power production. As a result, another of TSE’s goals is to commit to the use of local and other sustainable sources of energy as required by the changing market conditions and the growing concern for the environment.

Fuel flexibility through circulating fluidised bed technology

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The intensive energy usage is backed by a large share of renewable based energies including biofuels used for heating purposes. “The country has a long tradition of utilising wood as an energy resource. The share of hydro power is not as high as the neighbouring countries Sweden and Norway, which is just one of the reasons why CHP-production technology has been developed successfully for decades here,” comments Bastman.

Unique alliance model

In order to complete the NA4 CHP project, TSE has opted to use an alliance model for all civil work and HVAC installations, which is a relatively new concept in Finland. “Our project is the first on an industrial scale in the country to be utilising this new approach for civil works,” says Bastman. In an alliance contract model, a set of providers enters into a single arrangement with a CCG to deliver services. Commissioners and providers are legally bound together to deliver the specific contracted service, and to share risk and responsibility for meeting the agreed outcomes. As such, they should be incentivised to innovate and identify efficiencies across the system, rather than solely within their organisation. Subsequently, the alliance is reliant on high levels of trust across its relationships. Members collectively govern the alliance through a leadership board with an agreed term of reference. Accompanying this new way of managing services is TSE’s unique commitment to shareholders via an ‘open book plus fee’ principle. Bastman explains how this has a strong impact on the annual average prices of TSE’s products: “This requires a careful balance between prices and

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aantali, Finland to get Valmet’s multifuel CFB boiler

High combustion efficiency, low emissions and the combustion of biofuels are among the main characteristics of Valmet’s power generation solutions.

Fuel flexibility “Valmet’s fluidised bed boiler technology improves fuel independence through the utilisation of local biofuels”, says Jouni Kinni, Senior Sales Manager at Valmet. “This also applies to high humidity-content fuels and varying fuel proportions. Demanding fuels, such as refusederived fuel and agro biomass, can be used in the same unit.”

A large-scale power plant The Finnish energy supplier Turun Seudun Energiantuotanto has chosen Valmet as the boiler supplier for their upcoming power plant in Naantali. The start-up is scheduled for the autumn of 2017. The investment enables an increase in renewable fuels in power generation and the fulfilment of the new IEA emissions directive, which will come into effect in the EU at the beginning of 2016. The power plant represents everything that Valmet stands for. “It is designed to generate power by using biofuels at high efficiency,” says Jouni Kinni. “The loop seal superheater is external from the furnace, taking heat only from the circulating material returning from the cyclone. This enables the use of corrosive fuels in a high-steam temperature boiler.”