Summary
Facilities with an all-year need for heat and electricity like public baths are a perfect application for cogeneration. The Leuze Spa, Western Europe's largest mineral spring, replaced its old steam-based district heating system with a combined heat and power plant featuring 3 x 112 kWel and a condensing boiler. Several heat recovery units are used to derive heat from wastewater. Several frequency controllers along with an improved lighting system help to save some 170,000 kWh of electricity per year.
Results
The total cost of the co-generation plant was 501,000 €, the annual savings are 83,400 €. The cost for the heat recovery units were 189,000 €. They save 2,800 MWh per year worth 119,000 €. Here we achieve a payback time of less than 2 years.
The frequency controller caused an investment of 3,500 € and saves 14,5 MWh of electricity and costs of 1,400 € per year. The investment was paid by the Spa.
In total CO2-savings of 767 t per year are achieved
Since the boundary conditions in the location are very favourable for investments in energy efficiency, all our targets could be reached.
To find similar reports, click on a keyword below:
Buildings
: Citizens
: District Heating
: Electricity
: Energy Efficiency
: Financial Instruments
: Heat/Heating
: Lighting
: ManagEnergy
: Polygeneration
: Refurbishment of Buildings
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Case Study (254 Kb PDF)