Discharge port adjustment in function of climate conditions

[Renata]

Anyone knows a on line training or a presential one in Brazil about how to calculate de best discharge port ajustment of screw compressor in function of future climate conditions?

Tks, Renata

[HVACRsaurus]

Which brand Compressor?

[HVACRsaurus]

For Mycom;
Pages 2-13 through 2-17 and 4-1 through 4-4
http://www.mayekawausa.com/pdf/tech_data/160-320SCV.pdf

[Renata]

Bitzer, Mycom, frick, sabroe

[Renata]

For Mycom, the manual says: "Do not operate the compressor with the Vi at any other setting than the L, M or H
port setting", why it can't operate in a intermediate setting?

[HVACRsaurus]

It can - they are just being conservative / traditional

[RANGER1]

For Mycom, the manual says: "Do not operate the compressor with the Vi at any other setting than the L, M or H
port setting", why it can't operate in a intermediate setting?

Renata, you can do what you like, but against their recommendation.
As to why, I imagine they have done a lot of testing & they are the best settings to cover everything required.
Why not send them a note to ask why.
"J" series variable auto Vi is like Frick, but of course you would have to use their controller (like Frick). to get optimum result

[RANGER1]

Bitzer, Mycom, frick, sabroe

Bitzer probably download software on line
Mycom in manual as HVAC indicates, or Mycom selection programme
Frick auto Vi if using their control panel
Sabroe auto Vi uses Unisab, of manual Vi in their maintenance manual

There is a calculation for it which is in most manuals

http://sageenergy.ca/wp-content/uploads/Screw-Gas-Compression-Intro.pdf

http://www.mayekawa.com.au/wordpress/wp-content/uploads/2010/12/V-series-Screw-Compressor.pdf

https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1626&context=icec

https://oaktrust.library.tamu.edu/bitstream/handle/1969.1/163383/Vol28015.pdf?sequence=1&isAllowed=y

https://www.irc.wisc.edu/?/paper
07/01/03 3rd from bottom screw efficiencies

[Renata]

Ranger and HVACR,
I will try these links and recomendation.

thank you very much.

Renata