Quoted from:Tademirolu E ,  Sever R . An improved correlation for estimating solar radiation from bright sunshine data for Turkey[J]. Energy Conversion & Management, 1991, 31(6):599-600.

https://www.sci-hub.ren/10.1016/0196-8904(91)90095-z

INTRODUCTION

The mathematical model for the Kathabar Spray-Cel System developed by the authors in a previous work was used to predict the temperature and humidity ratio of the air at the drying bin inlet. The unsteady grain cooling model developed by Huzayyin (Ph.D. dissertation, Kansas State Univ. at Manhattan (1972); Ref.) is modified and coupled with the liquid desiccant system model to study the feasibility of using the system desiccated air in drying applications. The model shows the infeasibility of using desiccated air for grain drying. The liquid desiccant system was modified to simulate adiabatic operation and coupled to the drying model. The new system gave much better results, but its use for grain drying is still predicted to be economically unfeasible.

In this study, we have used the data based on Ref. and the reliable measurements of the State Meteorological Office for horizontal total solar radiation. We have then attempted to improve the regression coefficients of equation :

\( (H/Ho) = a + b(s/S) + c(s/S)^ 2. \)

Taşdemiroğlu and Sever also developed the following second-order polynomials to estimate global solar radiation for six locations of Turkey, as follows:

\( H/H_0 =0.225+0.014S/S_0 +0.001(S/S_0)^2. \)

In the determination of regression coefficients, the methodology explained in Ref. was used. Regression coefficients, uncertainties and variance are given for each of these locations. Regardless of the latitude, we have also grouped the data of six locations and developed an overall correlation of the monthly averages.