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Dear All, I was wondering if anyone has previously used Type 569 as a
PVT collector (with water flowing through the channels instead of air)? If so, did anyone make validation attempts? I am planning to model a rectangular flow unglazed polymer
PVT solar collector. Most model rely on the fin-type system. In our case, we will
have rectangular flow channels. Type 569 just has one channel, defined by collector
width,length, and channel height, if I understand correctly. My aim is to have loads of small channels, instead of just
one, so I probably will have to make some modifications (higher pressure drop,
higher velocities, turbulent HT, etc. …) Is there another Type out there, that might better suit my
needs? Of particular interest is the wind velocity dependency, and
how this is included in the efficiency calculations. I researched a lot about the specific importance of wind
speed’s influence on top loss for unglazed collectors (e.g. see NREL’s
paper on testing http://www.nrel.gov/docs/fy09osti/45466.pdf
, publications of Vajen et. Al in NEGST tasks) . Is that sufficiently implemented in Type569. Without having
had an in-depth look at the code, I don’t think so. Would be glad for any kind of input!! Best, Philip Philip Horn Cambridge, MA 02141, U.S.A.
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