Reference projects

For its 37 hotels operated inside Germany, the internationally renowned German hotel chain, Maritim, banks exclusively on combined heat and power generation. favis GmbH takes care of the construction and operation of the CHP units. The most recent project undertaken by the energy service provider from Essen was the commissioning of a CHP unit for the Maritim Hotel at Düsseldorf airport. For this it chose a GTK 240 made by the WOLF subsidiary Kuntschar + Schlüter, offering 237 kW electrical and 372 kW thermal output. The CHP unit achieves an electrical efficiency of 35.4 % and utilises the natural gas with which it operates with 91 % efficiency. The additional condensing heat exchanger delivers a further 54 kW heating output, increasing the overall efficiency – relative to the net calorific value of natural gas – to around 99 %.

The Schlosshotel Lerbach in Bergisch Gladbach is one of the best luxury hotels in Germany. The former manor house in neo-Renaissance style with English landscape gardens dating to 1898 was built by Ludwig Bopp according to plans by Gabriel von Seidl. Following extensive modernisation, the castle has been used as a hotel since 1992. Today, this five-star residence cossets it's demanding guests with environmentally sound heat and power delivered by a WOLF CHP unit.

Swed-Mobil has been the official Volvo dealership in St. Petersburg, Russia since 1994. The challenge raised by this car dealership was the provision of self-sufficiency in heat and power, both for their showrooms, as well as attached workshops. The building in question extends over several levels with parking spaces and a total floor area of 16,000 square metres. Special features: Self-sufficiency in electric power without export of excess to the grid. The solution: A WOLF CHP unit. The use of a combined heat and power unit provides a reliable, affordable and viable provision of electric power. This allows the business to generate electricity in stand-alone operation and with the highest level of efficiency, whilst using the heat generated as a by-product for heating purposes.

At first glance the Strümpelstraße student housing complex looks like a perfectly normal block of student apartments. Look again, however and this local student facility at the Heinrich Heine University in Düsseldorf transpires to be a creative solution to the perpetual problem of the time offset between supply and demand for renewables. And the solution is a latent heat store. A total of 496 H;M thermal batteries (cylinders containing sodium acetate) act as storage medium which can retain 4000 kWh latent heat plus 2000 kWh sensible heat. This latent heat store is fed by the waste heat from the installed CHP unit. This system offering 140 kW electrical and 210 kW thermal output was built by Kuntschar + Schlüter, a member of the WOLF group, supplying around 400 student apartments with their base load of heat. This pilot project is still unique in Germany in this form.

The Rainbow Park, Wuppertal, is a popular sports and leisure centre with a wide range of activities on offer – from bowling to fitness. For the modernisation of building services, Rainbow Park decided in favour of know how from WOLF and our group member, Kuntschar + Schlüter. Since then, heating and air handling units have provided an ideal indoor environment. The central ventilation units replaced by a GTK 50 CHP unit with 50 kW electrical and 80 kW thermal continuous output plus seven KG Top appliances in the model sizes 43 – 190 including a building management system.

The sewage plant of Mainburg was generally overhauled between the 2000 and 2002. As part of this modernisation, the boiler dating from 1967 used to heat the digester and the service building was replaced by a modern WOLF CHP unit. No longer was it necessary to burn the sewage gas in a boiler, instead it was used to drive the CHP unit. The CHP unit is driven by an MAN engine and comes fully wired in a container. It generates 52 kW electrical and 80 kW thermal output.