The water-based air conditioning system works by using 'two-pipe technology', providing heating and cooling simultaneously, in combination with an efficient and flexible heat recovery VRF system.
The hybrid system equiopment is more expensive to buy than common air conditioning systems which use refrigerant within occupied spaces. However, the HVRF system has significantly lower installation costs than traditional systems.
“We have now installed monitoring equipment to allow us to see how well the system is working for us and the feedback from staff has been fantastic,”
explained Mike Jenkins, Special Projects Director for Working Environments.
“Everyone has noticed how fresher and more balanced the internal temperatures have been and we’ve also noticed fewer drafts".
Here are examples provided by Mitsubishi Electric of the costs of the HVRF compared to non-HVRF systems based on a 'Part L' building:
The HVRF system demonstrated a 60% saving on the running cost and a reduction on CO2 emissions by three quarters, illustrated by the table below.
Additional benefits to no occupied space refrigerant
Mark Grayston from Mitsubishi Electric explained,
“We realised that one way to reduce cost and minimise possible hazards to persons, property and the environment, would be to remove the refrigerant from occupied spaces using a water based system. This hybrid VRF system has been developed exclusively to answer this need.”