Solar thermal collectors in parallel

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Discussion Overview

The discussion revolves around the installation of multiple solar thermal panels (evacuated tubes) in parallel using TRYNSYS software for solar thermal cooling simulations. Participants explore whether the effect of multiple panels can be simplified to that of a single larger panel with an equivalent area.

Discussion Character

  • Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions if installing multiple solar thermal panels in parallel is equivalent to having one large panel with the summed area of the individual panels.
  • Another participant agrees in principle, noting that proper scaling of piping to handle increased flow rates is necessary and suggests that the internal layout of the panels may not significantly affect the overall performance.
  • A later reply seeks confirmation that doubling the area of a single collector, with adjustments to tube diameters, would yield the same effect as having two panels in parallel.
  • Subsequent responses affirm this assumption without further elaboration.

Areas of Agreement / Disagreement

Participants generally agree that, in principle, the effect of multiple panels can be treated as a single larger panel, provided certain conditions regarding piping and flow rates are met. However, the discussion does not explore potential limitations or exceptions to this view.

Contextual Notes

There is an assumption that the internal layout of the panels does not significantly impact performance, but this is not explicitly verified. The discussion lacks detailed specifications of the parameters used in TRYNSYS and how they relate to the proposed simplifications.

Fady Alphons
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I am using TRYNSYS software to simulate solar thermal cooling. I need to install many solar thermal panels (evacuated tubes) in parallel. However, there is no feature to do that automatically in the software; so I can only add them manually with complex piping and stuff. So my question is:
Is installing multiple solar thermal panels in parallel is the same as having a one huge panel with an area of the summed areas of the multiple panels? Because if this true, I can just increase the size of the panels in the software and my problem will be solved.
 
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I would say "yes" in principle, provided the piping is scaled to handle the additional flow and you add flow rates on the specs (if that's a parameter). I am not familiar with what parameters TRYNSYS uses but a brief glance at the spec sheets at solarpanelplus.com does not appear to bother with internal layout (whether individual tubes are connected in parallel or serially) so why should you?
 
jambaugh said:
I would say "yes" in principle, provided the piping is scaled to handle the additional flow and you add flow rates on the specs (if that's a parameter). I am not familiar with what parameters TRYNSYS uses but a brief glance at the spec sheets at solarpanelplus.com does not appear to bother with internal layout (whether individual tubes are connected in parallel or serially) so why should you?
Thanks Jambaugh, So I can safely assume that doubling the area of a single collector (with increasing tubes diameters) will have the same effect of having two panels connected in parallel?
 
jambaugh said:
Yes.
Thanks.
 

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