Technical FAQs 4

What is the transmittance of PV glass?

The transmittance of PV glass, which is the ratio of the light transmitted through it to the incident light varies with different PV coverage rates (area proportion of photovoltaic cells) and different materials of PV modules.

Does low PV glass transmittance reduce solar heat gain?

Lowered PV glass transmittance and the realization of natural ventilation through the DSF structure would both contribute to the reduction of solar heat gain into the room context.

How does glass transmittance affect solar heat gain?

The reduction of glass transmittance would affect the transmitted, absorbed, conducted and re-radiated solar radiation through the DSF structure, while natural ventilation had no effect on the transmitted light. STPV-DSF with the lowest glass transmittance ( τ = 20% outer skin) and external circulation achieved the lowest solar heat gain in summer.

Do photovoltaic modules save energy?

Sun et al. reported that when adding photovoltaic modules to single-layer transparent glass windows, PV modules were always beneficial to the energy-saving of heating and cooling system while the energy saving ratio would decrease with the increase of PV area.

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