so the model can be applied on-site to parabolic trough collectors in actual conditions that track the sun only along one axis.
This added flexibility in the test requirements means that all tests can be conducted as transient tests,
which considerably reduces the testing time spent in waiting for the ideal conditions. Furthermore, the dynamic model predictions for the outlet temperature,
output energy and thermal efficiency are in good agreement with measured results on both clear and cloudy days,
which shows that this model can provide quick, reliable on-site testing.