In 2003, a hydrogen strategy was developed by the Government of Aragon. Its main objective is the development of new hydrogen technologies integrated with renewable energies and the promotion of Aragon’s incorporation to economic activities related to the use of hydrogen as an energy vector. To that end, the organisation, management, and execution of a wide range of actions in order to generate, store and transport hydrogen for its use in fuel cells, in transport applications or for the generation of distributed energy is carried out. The Government of Aragon aims to encourage research, technological development, cogeneration and industrial adaptation, contributing to industrial modernisation and the improvement of competitiveness. The implantation of projects based on sustainable energies that provide technological innovation and promote the energetic and environmental sustainability are favoured. Nowadays there are 73 members of the hydrogen strategy which are part of its Board and they belong to different sectors of interest.
Smart energy system
The ENNSHAFEN port, located in Enns, is the newest and most modern public port in Austria. Several local stakeholders are committed to invest in various types of energy cooperation: PV modules on (large) company roofs or other areas at the Ennshafen site, utilization of waste heat flux at Ennshafen between relevant companies, cooperation of companies regarding electricity (supply and demand) and gas (supply and demand), and electrification of the power supply of anchored
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.
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.
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.
Dollnstein is a small community with about 2,700 inhabitants in the heart of Bavaria, Germany. Dollnstein is located in the Altmühltal Nature Park, one of the most popular touristic destinations in Bavaria. In 2011, the municipality has initiated and in 2013/14 installed an intelligent heating network for about 40 households and several communal buildings.
Brædstrup Fjernvarme has during the last 10 years been a Danish frontrunner in how to make district heating efficient, cheap for the customers and environmentally friendly at the same time through activities in the electricity market, smart metering, introduction of regularly service visits by the customers and support to improvement of house installations, implementation of the worlds first large scale solar district heating plant combined with natural gas fired CHP, implementation of borehole storage, heat pump and electric boiler to be able to maximise flexibility in the electricity market. The result has been a natural gas reduction of 38%.
In 2008, the Regional Municipality of Bornholm decided to become a 100% sustainable and CO2-neutral society in 2025, in which only sustainable and renewable energy is used. In 2019, already 60% of the island’s energy is produced fossil-free by using wind, sun and biomass power. The island’s green vision, big share of renewable energy, citizen and community involvement and replicability of the energy solution helped in winning the 2019 RESponsible Island Prize.
Metro trains generate excess heat when operating. The electric motors create heat due to their electrical and mechanical functioning at acceleration, at constant speed and at deceleration. About half of the heat in an underground system is produced when trains slow down: waste heat is produced by the brakes when a train approaches a station. The ventilation system of the trains also generates excess heat. For citys it is interesting to use this excess heat for their district heating network. In Berline the ReUseHeat project worked on an interesting example.