Geothermal heating installation at the hostel in Vall de Núria

Geothermal heating installation at the hostel in Vall de Núria

With the aim of maximising energy consumption at the hostel in Vall de Núria with renewable energy sources, a geothermal climate control system was installed.

Agència Catalana de la Joventut. Government of Catalonia
April 2019–December 2019
Type of service:
Industrial supplies and assemblies
The work included: the disassembly of existing diesel boilers; earthworks for the installation of pipelines; the construction of 120-metre deep catchment wells; the installation of the different geothermal heat pump energy exchangers; the new engine room; and the installation of photovoltaic panels to power the geothermal pumps.
The work began with the disassembly of the existing installation, a task that involved dismantling and scrapping the old diesel tanks. The ground was then lowered on a levelled area near the hostel and 38 geothermal wells were built.
Subsequently, trenches were dug in which the polyethylene pipes were laid and welded. These pipes converge in chambers and enter the engine room via larger diameter pipes. The engine room was comprehensively renovated, with improvements to the walls and the waterproofing of the roof.
At the same time, all the installation equipment (geothermal pumps, heat exchangers, expansion tanks, domestic hot water (DHW) storage tanks, pumping unit, etc.) was installed. All this equipment was linked together by PP-R pressure pipes.
Once the installation was complete, circulation, pressure and control tests were carried out. Lastly, the electrical and climate control installations were legalised.

Technical data

Transportation of materials and machinery on freight carriages on the Vall de Núria rack railway.
Construction of 38 geothermal wells with a depth of 120 metres.
Over 1,000 m3 of earthworks for the trenches and lowering of the ground.
Installation of 5,200 metres of polyethylene piping with diameters of 40 mm and 75 mm.
Installation of 4 geothermal chambers and 10 underground outlets.
Performance of water tightness and pressure tests on the installation.
Supply and installation of four 60 kW NIBE geothermal heat pumps.
Electrical installation of the new engine room and integration of the existing installation control into the central climate control system.
Supply and installation of photovoltaic solar panels with a total power of 30 kWp on the roof of the hostel.