Comparison Result of Hourly Solar Radiation Under The Clear Sky Condition Based on of Solar Radiation Model and Measured Data Experiment

Indonesia is a country on the equator, and a tropical country with two conditions, rainy and sunny. Indonesia has a long cycle of solar radiation intensity which began from 8:00 until 16:00, the effective time being 5 hours on peak solar time. To know the efficiency power applicable to solar power technology, calculation of the solar radiation intensity is required. The purpose of this paper is to compare the hourly solar radiation under the clear sky condition based on the solar radiation model and measured data experiment. The solar radiation model proposed by ASHRAE has been compared and evaluated with measured data using statistical analysis. The measurement data used as validation data on the estimation of solar radiation based on the solar radiation model suggested by ASHRAE with the used coefficient A is 1000, B is 0.4 and C is 0.136. The results of the statistical analysis show good agreement between measurement and empirical models with the peak of solar radiation is 641 W/m2 on 19 June 2019.