GEOFIT is being successfully implemented in 5 pilot sites in Ireland, Italy, France, and Spain. The demonstration sites are open case studies representing various climates and situations found throughout Europe, with different building types and different soil conditions.
SANT CUGAT (SPAIN) / Primary School
ELS PINS DEL VALLÈS SCHOOL / Retrofitting and implementation of a geothermal system helps the municipality reduce environmental and carbon footprint and increase the use of renewable energy technologies. IDDS methodology is applied along the whole project life cycle and GEOBIM based management can show time and cost reduction. nZEB case study.
Industrial partners involved: COMS, IDP, CDP, SIART, UPO, ILECO, OCHS.
Innovation Level: 2.
Location: Sant Cugat, Spain.
Typology / Use: Tertiary / Educational.
Year of Construction: 1975Area: 3.894 m2.
Geofit Area: Primary school building 466 m2; administration building 289 m2; sports pavilion 454 m2.
Climate Condition: Mediterranean existing.
HVAC System: Central heating system (gas boilers) with radiators.
Geological Data: Mainly silty clays.
Total Energy Consumption: 414.862 kWh/year (31% electricity + 69% natural gas).
Previous Retrofitting Works: PV panels (27,03kWp photovoltaic installation for self-consumption; façade retrofitting (external thermal insulation composite system ETICS/EIFS) and replacement of current windows in all buildings. LED technology lamps.
Thermal Energy Consumption (H): 75,51 kWh/m2/y,
Electric Energy Consumption (H): 33,03 kWh/m2/y.
Max. Power Consumption (H): 63 kW.
Simulation and Demand Modelling: Heating – 192,5 kW peak load and 144,5 MWh total load. Cooling – 6 kW peak load and 3,8 MWh total load.
Number of vertical boreholes: 12; Depth: 120 m. Spacing: 10 m | Number of horizontal: 1. Length: 100 m.
Drilling / Excavation: Improved vertical drilling and horizontal directional drilling (HDD).
Building Monitoring: Environmental survey to evaluate the state of the fact of the building; survey during drilling phase to understand which the building response is; survey after the shock with the aim to compare with previous.
Ground Source Heat Pump: Electrically driven heat pump with 40kW heating capacity and 5kW cooling capacity with a 2.055 l buffer tank. Whole system designed with R1234zee refrigerant. Heat pump operational control system integrated. COP = 4,7.
Operation Strategy: new ground-source heat pump covers most of heat demand; base load provided by the GEOFIT system and peak demand by the existing gas boiler
Retrofitting: High temperature cooling (HTC) passive geothermal system (cooling panels + ventilation + modular control center) in the administrative building. Highly modularized, ‘plug-and-play’, ‘ready-to-install’ and energy-efficient cooling solution.
BEMS: GEOFIT system integrated in the BEMS.