Effect of vacuum on evacuated tube solar collectors

In this video you can see the difference in water temperature when the vacuum is lost in an evacuated tube solar collector.

[@sitapathi579]

బాగుంది. Good job

[@andrzejreszka6367]

Prosto i ciekawie.

[@haydarkadhim5904]

the left one is vaccumed and the right one is. not vaccumed type?

[@mateuszk887]

right one is broken, so there is no vacuum inside anymore.

[@haydarkadhim5904]

in other way does the vaccum make the tube higher in temp.?

[@mateuszk887]

yes

[@kiddouble-o-two293]

Vacuum is an insulator, thus keeping the heat where it supposed to be