INFLUENCE THE ANGLE OF INCLINATION OF THE SOLAR COLLECTOR ON THE MAXIMUM RECEIVED SOLAR ENERGY
In this paper, an attempt has been made to develop a computer program to estimate the hourly terrestrial radiation: direct beam, diffuse and global solar radiations are modeled and calculated based on monthly average of daily global radiation data measured for a horizontal and tilted surfaces for the climate of Mosul city (latitude: 36.19N, longitude: 43.09 E, elevation: 223 m above mean sea level). Most of the parameters modeled in this work represent a part of the input data required by building thermal simulation and solar energy systems software. Important trends of the solar radiation on horizontal and tilted surfaces as a function of time and direction are being presented and discussed. The effect of tilt angle on the incident solar radiation fluxes for different months along the year are presented. A comparison of the incident solar radiation on horizontal and tilted surfaces has been made. The results presented in this paper are quite useful for quick estimation of solar radiation for calculations of solar collector performance. Also, the computer program developed in this work form the backbone of any computer-aided building thermal design and solar systems design calculations.