Greetings all (and Smitty?),

I'm doing a solar thermal system/in-slab hydronics, and though I have done a number of SDHW systems, I'm new to moving fluid through larger arrays.

The collector is 5 (possibly six), 4x8 Solar Kings ground mounted about forty feet from the house. I would like to run the pump(s) PV direct and it would seem that there is a shortage of pumps to choose from here. I was thinking two Hartel HEH-10's (did I get the model numer right) and would welcome other suggestions. Also, ....

1 - Is it best to plumb (pipes) them in series, or parallel?

2- Is it best to wire them each to individual 18-22 watt panels (my guess) or both to a single 38 to 44 watt panel.

3 - The burried and insulated piping from the array to the house.... go with 3/4 inch pipe (or even larger) to accomidate flow, or 1/2 inch to reduce heat loss from piping surface area AND the increased time the heat transfer fluid spends in the pipe?

Thanks in advance for thoughts and suggestions.

Kurt Nelson

SOLutions

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