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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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Solar Heating and Cooling in an Energy Efficient Residential Building

Within a privately owned residential building a variety of technologies are implemented to reduce the energy consumption. Both a solar heating system and heat pump are connected to a boiler for the heating of water. This water is used as sanitary hot water. Space heating and cooling is achieved from fan coil units (FCUs); where hot or cold water circulates inside the convectors depending on the need. Finally, underfloor heating is established through a closed water pipe system, with a heat pump as heating source. The monitoring of the entire system takes place in one control unit.

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Kuzma small biomass district heating

In the small Slovenian town Kuzma a district heating network is established based on biomass burning. The investments were made by a private company, with the financial support of the national government, and the aim of reducing energy prices in the area. The biomass used is collected from local wood owners in the neighbourhood and converted into heat by two biomass boilers. In combination with a 10 m3 storage tank for peak load no additional heat source is required to supply heating to 58 houses and some other residential buildings.

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Heating with Woodchips in Güttenbach

The biomass heating plant and district heating grid in Güttenbach (Austria) was built in 1997. The boilers are fired with wood chips from local forests. There are two boilers installed, one biomass boiler with 1 MW capacity and one oil boiler for peak load and backup with 1.3 MW capacity. The village of Güttenbach has about 900 inhabitants and an area of 16 km2. The district heating grid has a length of 12 km with about 240 connected consumers. Each year there are 5,200 MWh heat sold to the consumers.

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