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Solar water, residential - Rated system size incorretly calculated
12 Sep 2022 21:23 #11452
by Paul Gilman
Replied by Paul Gilman on topic Solar water, residential - Rated system size incorretly calculated
Hi Russ,
The equation in the user interface on the Solar Water Heating input page for Rated System Size seems to be working in SAM 2021.12.02 r2 as described in Help.
For example, this screenshot shows inputs for Collector Area = 2.5 m2, FRta = 0.7, FRUL = 4, and Number of Collectors = 2.
The equation given in Help is:
Nameplate Capacity = Total Collector Area × ( FRta - FRUL × 30/1000 )
5 * ( 0.7 - 4 * 0.03 ) = 2.9
As for the manual being out of date, there have been changes to the code since then, but I'm not sure how significant they have been, and we haven't had the resources to review and revise the manual.
Thanks,
Paul.
The equation in the user interface on the Solar Water Heating input page for Rated System Size seems to be working in SAM 2021.12.02 r2 as described in Help.
For example, this screenshot shows inputs for Collector Area = 2.5 m2, FRta = 0.7, FRUL = 4, and Number of Collectors = 2.
The equation given in Help is:
Nameplate Capacity = Total Collector Area × ( FRta - FRUL × 30/1000 )
5 * ( 0.7 - 4 * 0.03 ) = 2.9
As for the manual being out of date, there have been changes to the code since then, but I'm not sure how significant they have been, and we haven't had the resources to review and revise the manual.
Thanks,
Paul.
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