Clearness Index Determination in Santo Domingo To Predict the Solar Radiation

Abstract

In order to establish the correct dimensions of any device that works with alternative energy it is necessary to evaluate the available resources. Daily solar radiation was measured in Santo Domingo city using a pyranometer. Simultaneously, for every day, the time evolution of the total solar irradiance was determined. The relationship between solar radiation and total solar irradiance was analyzed for a defined period, obtaining the average hourly clearness index global to statistically predict the solar irradiance that will reach the surface on our location considering the cloudiness based on the Julian day. This parameter will enable a more exact simulation of the operation of any device working with solar energy in Santo Domingo, particularly the solar refrigerator of our research group.