Originally Posted by
Romanicus
Hi again, and thanks for the responses.
No compressors yet installed.
It's a tender book. I will go with 2 screws with economizer, VSD driven each, pumped ammonia, all evaporators with hot gas defrost, evaporative condenser.
It's a logistic center. In the tender it's specified that you must have this automatic air purger, but i'm afraid that my competition will not offer it. I will offer it, because the tender asks for that, but i want to discuss with the client and maybe he will agree not to have it (if he pushes me with the price down)
It's a one stage plant. I agree with you that it's nice to have an automatic air purger, but it costs quite a lot.
For sure, if the client agrees not to have this automatic air purger i will install manual purging system.
For Sandro: In normal operation is not possible to run at -35C. All the rooms are -20C rooms. BUT, the client might want to store ice cream or something like that, in this case, yes, it's possible to run at a lower suction temperature. But again, the tender specifies -28 evap, -20 air inlet in the evaporator.
Till now the score is 3-1 against the automatic air purger :)
All the best,
Andrei