Latest power generation efficiency of photovoltaic systems is about 15%. We carried out 2 experiments to improve the power generation efficiency. One is on the improvement of the efficiency by using solar reflections from walls or eaves. Another is on the improvement of the efficiency by cooling a photovoltaic module by spraying water.
<p>This study aims to develop an operation control method for residential CHP (Combined Heat and Power) systems with BD (Buffer Device) and PV (Photovoltaics). Energy saving and operation properties of SH (Smart House) were analyzed through demonstration experiments.</p>
We measured the sensible and latent heat flux on the glass roof with water pond and the grass yard at the Oasis2l. The sensible heat flux on the water pond was 1/10 times larger than on the grass. The Bowen ratio is 2.0 on the grass and 0.2 on the water pond. And we suggested a possibility that the measurement of sensible heat flux above the void area using Scintillometer. The heat flux and temperatures around grass surface was calculated by numerical models. In as a consequence, the flux value was calculated almost properly. The thermal impacts of Oasis2l that the influence to the around thermal environment and radiant environment and so on are confirmed.