Abstract
In recent yeas, photovoltaic-thermal hybrid solar collector has been studied and developed all over the world. However, system performance of photovoltaic-thermal hybrid collector has not been clarified quantitatively because of the lack of comparison with conventional side-by-side system and of standard evaluating method for photovoltaic-thermal binary utilization system. So we conducted this comparison first, and then considered evaluating quantity.
To evaluate the performance of primary solar energy converters quantitatively, several types of solar photovoltaic-thermal binary utilization system for residential buildings were discussed. Different two hybrid systems with photovoltaic-thermal hybrid collectors, side-by-side system with c-Si photovoltaic modules and liquid type flat-plate collectors have been designed and simulated. Under the constant installation area of 33.6m2, electrical load of 4, 032kWh/yr and DHW (domestic hot water) load of 7, 282kWh/yr, we compared performance of the hybrid systems with the side-by-side system in terms of solar energy fraction. As an annual result, the best solar energy fraction was achieved by the hybrid system, which produced 75.4% and was 6.5% higher than the side-by-side system, which produced 68.9%. Moreover, it was found that the hybrid system becomes better than the side-by-side system with increase of DHW load.
