The scope of this study is to present a novel methodology for the validation of a solar parabolic trough collector simulation model

developed in System Advisor Model software

using solar field thermal performance experimental model functions that duly account for the contributions of errors that are inherent in the collection of input experimental data. The study focuses on the uncertainty associated with the predicted thermal energy output and thermal efficiency

which were calculated by using standardized testing procedures that were developed by the National Renewable Energy Laboratory and the American Society of Mechanical Engineers. Errors due to imperfections of the experimental models used throughout the test are also counted in

as well as uncertainties attributed to the variability of meteorological conditions. The experimental tests were conducted under clear-sky and steady-state conditions in Kenya

using a prototype parabolic trough collector. The uncertainty analysis provided a realistic evaluation of the thermal performance of the prototype during testing

resulting in expanded uncertainties of 9.05% (0.104 kWhth) for thermal output and 3.66% (0.0258) for thermal efficiency. Notably

the predicted thermal output and thermal efficiency from the experimental models did not exceed observed levels

demonstrating a strong correlation between predicted and observed values

supported by R2 regression coefficients of 0.972 for thermal output and 0.989 for thermal efficiency. The comparison of the two experimental model results with the simulation outcomes validated the performance of the simulation model

as the simulation results fell within the experimental error margins. Additionally

the statistical analysis yielded significant results

with root mean square error

mean bias error

and t-statistics values for thermal energy output of 0.057

0.033

and 2.135

respectively

and for thermal efficiency

0.018

0.010

and 1.993

respectively

indicating the accuracy and reliability of the simulation model. Thus

the simulation model has been successfully validated

proving its capability to accurately predict the thermal output and efficiency of the parabolic trough collector.