District heating

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Utilization of seawater as a heat source

Drammen wished to upgrade their existing district heating which was a mixture of electric, biomass
and gas/oil. They recognised the need to move from fossil and combustion fuels and so decided to
utilize seawater as a heat source for an industrial heat pump. Also recognizing the danger of
HydroFluoroCarbons (HFCs) and other synthetic working fluids they began to explore the use of
ammonia.

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Geothermal heat sources for the DH System of Ferrara

The network in Ferrara has already achieved significant results, but represents a perfect field to test advanced improvement strategies. As of 2014 the network is 56 km long, with 591 users’ substations, delivering approximately 143 GWht/a. The energy mix is a combination of geothermal source (14 MWt), WTE (30 MWt) and gas boilers, including a significant storage system (1,200 m3). The average temperature levels are 90°C on the supply line and 60°C on the return line.

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Upgrading the performance of Sisak’s District Heating Networks

The target city of the Upgrade DH project in Croatia is the city of Sisak. It is a middle sized city located in the Sisak – Moslavina County, southeast from the Croatian capital, Zagreb. The city is the administrative, cultural and historical center of the county, as well as one of Croatia’s biggest river ports and industrial cities. Total number of inhabitants is 47,768, as stated in the 2011 population census. Out of this number, 33,322 inhabitants live in the urban settlement.

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Upgrading the performance of Middelfart’s District Heating Networks

The city Middelfart is located on Funen in the South-Region of Denmark, with around 15.246 inhabitants. Middelfart District Heating System is divided into two areas (Hessgade and Fynsgade), and are organizationally in charge of both Middelfart District Heating Area, but also Nørre Åby District Heating Area. Middelfart DH does not supply Nørre Åby, since they have their own local energy system, meaning Middelfart DH only supplies the city of Middelfart.

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Upgrading the performance of Tuzla’s District Heating Networks

The city of Tuzla is placed in North-East part of the country, with around 170,000 inhabitants. The DH system is based on cogeneration (CHP) in Tuzla’s coal-based power plant (Tuzla TPP)operated by EPBiH power utility. Tuzla TPP is the supplier of heat to both Tuzla City (220 MWth) and Lukavac city (50 MWth). In the near future, the town of Živinice is planned to be supplied with a thermal power of 70 MWth.

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