I am trying to calculate incident solar radiation on the south facade with DAYSIM irradiance sensors and also EnergyPlus, while comparing the results of both tools with real measurements. I created my geometry in Ecotect and used DAYSIM 3.1e (beta).
I used these irradiance sensor order(attached *.pts) and modified the *.hea file to force Daysim calculate the irradiance as following:
sensor_file_unit 2 2 2 2
sensor_file_info 0 0 0 0
Since the measured values are available with 15 min intervals, all simulations are performed with the same time step.
However, the results that I extracted from DAYSIM (*.ill) have low correlation with measured values, while EnergyPlus returned more coherent outputs.
Can anyone help me to close the gap between measured data and DAYSIM results?
I have attached the comparison and some screenshots of the model in DAYSIM.
Thank you in advance