Solar Hot Water - User Specified Collector Specification for Incident Angle Modifier

Hi,

I'm trying to create a model for a SWH system, but the particular collector module that I'm testing is not in SAM's library of SRCC Collectors. The SRCC online database does have an entry on the collector, and I've been able to determine what the FRta and FRUL coefficients are (simply the coefficients in the ISO efficiency equation in the SRCC report). However, I have no details about the Incident Angle Modifier. Is there a resource where I could find that data, or is there a typical value for tubular collectors that I should use?

Thanks,
Andrew

Hi Andrew,

SAM's solar water heating model is intended to model flat plate collectors. I am not sure it will accurately model a tubular collector.

In general, I would assume that you could use the IAM for a similar collector and expect reasonable results.

Best regards,
Paul.