Underfloor watering and climate battery combined- will it work?

I've got a 21m2 high tunnel (3x7m) I want to grow tomatoes in. This tunnel has a ventilation problem, it gets way too hot in the middle of summer.

I've also got ducks that will need their 0.8 m3 pond cleaning out weekly in the summer.

I've been thinking of putting in two drain pipes like these buried underneath the two paths running lengthwise :

The ends of these I'd have poking out. This is where I could drain the duck water into. Also, I could make a  tube with a solar powered computer fan at one end, pushing hot air down the drainpipes for cooling in the soil.

Would that work?

I would worry that the duck water clogged the tubes.
Ducks and their "contributions" are known for their ability to gley a pond.
Gleying, if you don't know means sealing to prevent water from infiltration into the surrounding soil.
I apply the duck water to the surface of the soil at the base of the plants.
If you are worried about water born disease, I would pour the duck water into carbon rich compost pile instead.

The climate battery part might work well.
The online guides to this kind of thing call for deep excavations, long stretches of tube and powerful fans.
I say add them to under your paths if you, then try to use them as you see fit.