proper distribution inside plate evaporators?

[pirestani]

Hi friends
I want to assemble an(plate heat exchanger) ecomomizer and attach it to screw compressor at -15eva. and +35con.by R22.
how can I be so sure about proper distribution of liquid injection or expansion in evaporator side(plates) of economizer concerning to so many plats? is it neccessary to use of especial part or not?
Thank u in advance for advice.

[gregd1401]

Maybe Tichelman principle can be applied here.

[charlie n]

For a small brazed unit used as economizer, distribution is pretty much self regulating. For larger PHE evaporators, a distribution tube is mounted inside the (lower) liquid connection to ensure liquid is injected into every passage.

[pirestani]

thank
but I think Thichelman priciple usually define in uniform pipe&flow and single-phase liquid inside.not here.

[gregd1401]

I have seen injection tube used on large PHE however I gon"t know how to calculate hole sizes. I think this would be fairly critical.

[nevgee]

Try the SWEP site they have downloadable application software and manuals

http://www.swep.net/index.php?tpl=page0&lang=en&id=113

[nike123]

I have seen injection tube used on large PHE however I gon"t know how to calculate hole sizes. I think this would be fairly critical.

Check this manual (http://www.mediafire.com/?oykimlmnygy) page 97.
However, dimensions are not given but you could call Alfa Laval technical support and ask if they have ready made products.

[peter2010]

Check this manual page 97.
However, dimensions are not given but you could call Alfa Laval technical support and ask if they have ready made products.

that link look like a spam. you'd better go with official swep.net site.

[nike123]

that link look like a spam. you'd better go with official swep.net site.

And why you think that that link is the spam? Or you just paranoid? Or you work for SWEP?:confused:

http://i50.tinypic.com/xe1ypu.jpg