Solar Photovoltaic Array
A grid-connected photovoltaic array of 50 kWp. is installed on the southern facade and roof of the NTUA’s Chemical Engineering building complex, in a standard and hybrid PV-Thermal configuration.
This arrangement is meant to save conventional energy (thus limiting pollution normally associated with the latter) and to improve the thermal comfort in the adjacent large laboratory space.
Simple technology used: Such an integration demonstrates the potential of solar retrofitting, using appropriate photovoltaic systems and basic heat transfer techniques.
The technology applied in the hybrid arrays exploits the synergy between the need for cooling the PV cells – if their electrical efficiency is to remain at high levels – and the existence of a heating load in the adjacent working space.
Heat – Cool the adjacent space: The air flow created at the back side of the arrays is diverted accordingly to the adjacent space to cool or heat the area.
Clean Power production: According to Europe’s Photovoltaic Geographical System (PVGS), in Athens each KW of installed Photovoltaic in Athens, produces about 1570 kWh yearly. Thus, this installation of 50 kWp is capable of supplying with 75 – 80 MWhs yearly.