By Natalia Rey Aguirre, Key Account Manager, Heat/Cooling meters, Kamstrup
FOCUS EMERGING DH MARKETS
residences, which will be included in an energy rehabilitation that involves being connected to the new system. Almost 50 % of the new homes (606) will be social housing. Two biomass boilers will produce heat with an output of 1,400 kW each, which, thanks to a proper system operation, will produce more than 90 % of the consumed thermal energy. Two gas boilers will serve as backup. With this system, the generation of thermal energy will be optimised with a minimum fuel consumption. The system will be operated by a joint venture formed by Ferrovial Servicios, S.A. and Tecnocontrol Servicios, S.A. This innovative heating system would be of little use if the corresponding distribution system did not match its standard. In this case, the hot water will flow through 3 kilometres of buried, pre-insulated and linear pipeline connecting the point of production with each of the buildings that are connected to the system. The thermal conductivity of the pipes is λ=0.023 W/m-K, with a thickness of 30 mm and 60 mm. The outlet temperature of the hot water is 90 º C, and the inlet temperature is 70 º C. It is expected that the losses that may occur in the more than 3 kilometres of pipes do not reach 3 % of the total thermal energy transported.
In the city of San Sebastián in the beautiful north cost of Spain, a new neighbourhood has emerged from the renovation of the neighbourhood of Txomin. It is a new residential area on the banks of the Urumea river that seeks to be a benchmark in the field of energy efficiency. The neighbourhood is characterized by a deep respect for the environment, which is manifested in charging points for electric vehicles, public LED lighting and smart meters that at all times provide information about the energy consumption accumulated by the users. But the most remarkable aspect of this new residential area is the district heating system, which will lower prices for the residents as well as cause a substantial drop in the CO2-emissions. BIOMASS AS A SOURCE OF ENERGY The heating system is a biomass heating system, the largest in the Basque Country to date, promoted by the San Sebastián Municipality, which will maintain its ownership through its public company Fomento de San Sebastián, S.A. once in operation. The district heating of Txomin will provide heating and hot water to all residences in the new neighbourhood, both to the new residences, 874 in the first phase to which 359 will be added in the second phase, and to the existing 157
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