Study on the efficiency of large shallow GSHP Systems

ELI-NP after one year operation


  • Razvan Silviu Stefana ELI-NP | Romania
  • Delia Tinca ELI-NP | Romania
  • Radu Mircea Damian Technical University of CIvil Engineering | Faculty of Bulding Services



Heat pumps, buildings, energy efficiency, shallow GSHP


This paper is an overview of the performances of the Shallow Ground Source Heat Pump HVAC system from ELI-NP after one year of operation. It approaches the system performances in terms of energy consumption, stability of the indoor comfort parameters and prospective of optimal control. The use of a research facility is different from a classic non- residential building. The large equipment and the large built area of the clean rooms, the high stability of the required comfort parameters imply a high consumption of energy for heating, ventilation and air conditioning. The final goal is to achieve a viable model with replication potential for general use applications (air conditioning of non-residential objectives or district centralized air conditioning). Databases resulting from the continuous real-time monitoring of the system, during 2020, have been analyzed. Deviations of data from the reference values have been interpreted to find solutions for the long-term keeping of indoor microclimate parameters at the required values. The data analysis shows that the system covers the building load / the building energy needs at a high parameters stability. The Energy Intensity Use of the ELI-NP facility (436.13 kWh/ m2/yr) is less than half of the median EUI for Technology/Science laboratories in the US (1004 kWh/ m2/yr), as published on the platform Energy Star. The use of the shallow Ground Source Heat Pump HVAC system instead of a traditional fossil fuel one, comes with estimated savings of 60% in the cost of energy consumption of buildings. The next step to follow is a higher accuracy separation of the Ground Source Heat Pump HVAC system electricity consumption. Then an optimization strategy to supply the indoor comfort parameters at the lowest possible energy consumption follows.




How to Cite

Stefana, R. S., Tinca, D., & Damian, R. M. (2022). Study on the efficiency of large shallow GSHP Systems: ELI-NP after one year operation. CLIMA 2022 Conference.