Distribution of Direct and Diffuse Radiation on Bawean Island, East Java Indonesia
Keywords:
Bawean Island, direct radiation, diffuse radiation, solar electric, solar thermalAbstract
A study of the availability of solar energy is an interesting topic. By knowing the amount of solar energy available at a location, it can be determined how much power can be generated by a solar energy equipment and what utilization system should be used (whether solar electric or solar thermal systems). Solar radiation that falls on the earth's surface is a total radiation consisting of direct radiation components and diffuse radiation components. In their use, direct radiation is more effective for photovoltaic solar cell applications to generate electricity and solar concentrators in high temperature thermal applications, whereas total radiation and diffuse radiation will be more effective for solar collector fittings for thermal applications with relatively low to moderate temperatures. This paper discusses the distribution of both radiation components, especially in Bawean Island. Based on observational data from Sangkapura Meteorology Station, Bawean for 15 years (1994-2010) obtained an illustration of direct radiation distribution is more dominant than the diffuse radiation. This indicates that Bawean Island is suitable for solar photovoltaic applications as well as solar concentrator for electricity generation purposes. This can help local people to overcome the problem of limited electricity supply from state owned electricity (PLN) on the island.
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