There weather is cold here, so the PVA coat last up two hours to dry. I do not want to spend energy blowing heat air.
There is any 'fast PVA' or should I add any kind of reagent to speed up the process?

Thanks!!

Unfortunately there is not much you can do about it.
But two questions come to my mind:
-do you really need pva? In my opinion pva, except for some rare cases, is kind of an outdated release agent. Modern chemical release agents are so much better than pva or wax, that I usually don't use both of them any more
-2 hours seems a bit long. At what temperature is your workshop? Low temperatures can lead to many additional problems.