30 May 2005
In the last few years, high energy consumption due to heating and cooling encouraged interest in
the efficient use of energy in buildings and highlighted the need for new configurations and strategies
for heating, ventilation and air conditioning systems of buildings. Simulation has always been a main
tool for analyzing energy balances in buildings, even though the reliability of the results is often
compromised by a lack of certainty that the simulations reflect real conditions.
The aim of this monitoring is to analyse the energy supply system based on a ground coupled heat
pump heating and cooling system installed in a multi storey office building in Vienna, Austria.
The results showed a seasonal performance factor of 2.5 for the total energy supply system in the
first year of operation; however the special conditions especially during summer in a consequence of
system adaptations have affected adversely the performance of the system. The ongoing monitoring of
the second year of operation of the system will bring conclusions of the system performance under
normal operating conditions.