Would it be possible...

[vapb400]

Real quick question,

Would it be possible to mount a condensor on the bottom side of the roof of a case?
or would it allow the refrigerant to move back to the compressor?

thanks alot

[[XC] gomeler]

I have always wondered that, how to manage the refrigerant flow. I would love to place my condensors in less standard positions but I have always worried about the flow.

[n00b 0f l337]

Definetly possible, some would say it may hurt the compressor, but I have a fealing that pressure will be enough...

[epion2985]

Need Walts expertise, I think he said you have to be careful about refrigerant flowing back.

[n00b 0f l337]

It depends I think on "where" this is, of course a slant towards the liquid line would be better, but I think if the condenser is 1" above the compressor with bout 3" of tube between compressor discharge and condenser intake I doubt you'll get much back flow.

[wdrzal]

Need Walts expertise, I think he said you have to be careful about refrigerant flowing back.

I don't remember saying anthing like that since the discharge is hot vapor.Its the suction you have to worry about liquid returing to the compressor. but the small charge in these systems probably is not enough refrigerant to fill the can up to slug the compressor.

I don't quite understand this whole thread, but in generial condensors have to be mounted to take advantage of the design of intake and discharge.most condensors are for vertical mounting I see here.but there are condensors for all mounting positions and some can be mounted in multiple positions.refer to manfacturer specs.

If you either over charge a unit or mount a condensor in the incorrect position,the condensor can fill with liquid taking away from its capacity.This will also cause a higher head pressure because of the increase of heat.As the condensor fills with refrigerant it leaves less room for the hot vapor to cool to saturation temperature.

Also a improperly evacuated system will usually trap air in the top of the condensor causing the head pressure to rise 40 to 50 psi above what is expected. This is caused by the nitrogen and oxygen which is normally considered non-condensables in these ss systems.

you want to DRAW air thru a condensor, using a well fitting fan shroud. Drawing air allowes for a more even flow and better effeicency.

You always have to consider your not only have the effect of pressure & velocity ,but gravity also comes into play.Also don't forget your also moving oil with the refrigerant.

[Moc]

Paint :woot:
I'm going to try this next weekend. Compressor will be a Danfoss BD35F :D :cool:

[epion2985]

I don't remember saying anthing like that since the discharge is hot vapor.Its the suction you have to worry about liquid returing to the compressor. but the small charge in these systems probably is not enough refrigerant to fill the can up to slug the compressor.

I don't quite understand this whole thread, but in generial condensors have to be mounted to take advantage of the design of intake and discharge.most condensors are for vertical mounting I see here.but there are condensors for all mounting positions and some can be mounted in multiple positions.refer to manfacturer specs.

If you either over charge a unit or mount a condensor in the incorrect position,the condensor can fill with liquid taking away from its capacity.This will also cause a higher head pressure because of the increase of heat.As the condensor fills with refrigerant it leaves less room for the hot vapor to cool to saturation temperature.

Also a improperly evacuated system will usually trap air in the top of the condensor causing the head pressure to rise 40 to 50 psi above what is expected. This is caused by the nitrogen and oxygen which is normally considered non-condensables in these ss systems.

you want to DRAW air thru a condensor, using a well fitting fan shroud. Drawing air allowes for a more even flow and better effeicency.

You always have to consider your not only have the effect of pressure & velocity ,but gravity also comes into play.Also don't forget your also moving oil with the refrigerant.


I thought that the discharge is vapor like you said, then it condenses and turns liquid in the condenser, at which point if the condenser is slanted in the direction of the compressor then due to gravity and boyancy the gas discharge will still go up but the liquid would flow back downward. Thats what I meant anyway.

I think I know what you mean by different condensers. I have seen some that are made for being mounted as the OP wants. Cant find that one on ebay anymore but it looked something like this:

http://img152.imageshack.us/img152/3453/11sa5.jpg

vs one that is made for vertical positioning like this:

http://img139.imageshack.us/img139/9336/29rv1.jpg


Am I right Walt?

[ICE COOL]

so i think that is not a problem but remember that always place the filter 45 degrees of the condensor for the gas.

ICE COOL

[Carlz0r]

so i think that is not a problem but remember that always place the filter 45 degrees of the condensor for the gas.

ICE COOL
It doesn't have to be 45 degrees, take a look at some of chilly1's units. It's nearly horizontal. If your condensor works properly, you shouldn't be getting any gas in the filter.

[epion2985]

so i think that is not a problem but remember that always place the filter 45 degrees of the condensor for the gas.

ICE COOL

I think it is a problem at least in a few other aspects like walt said, like refrigerant pooling in the condenser and high static pressures. You want to use a condenser that is made to be mounted the way you want, not just any condenser.

[Xeon th MG Pony]

It just luckily happens to be that the vast majority can indeed be mounted as such as is at least large scale ones, I've never had such a tiny Condenser to look at be for.

[Gray Mole]

Like this one, designed for horizontal use...

http://www.picturehosting.com/images/GrayMole/dsc02940.jpg

http://www.picturehosting.com/images/GrayMole/dsc02942.jpg

http://www.picturehosting.com/images/GrayMole/dsc02941.jpg

Bought it from Johann ages ago for a project that I'd like to do sometime.

It's roughly equal to a normal size SS condensor, maybe just a little more powerful the way it's configured but not by much if at all.

I don't really see the harm in a little bit of a run up, but would like to see a good U-Bend to prevent a load of refrigerant and/or oil getting back into the discharge on shutdown. With this kind of thing, I think that measuring the desuperheat on the discharge line is pretty crucial to know where you stand.

Cheers

Gray

[Xeon th MG Pony]

That is an Evap for a display case! lol, but ya it will work and FYI due to siphon effect it will not "Run down" on shut down, however if you with you could install a simple check valve.

[star882]

That is an Evap for a display case! lol, but ya it will work and FYI due to siphon effect it will not "Run down" on shut down, however if you with you could install a simple check valve.
Doesn't the compressor already have a check valve?

[Gray Mole]

That is an Evap for a display case! lol, but ya it will work and FYI due to siphon effect it will not "Run down" on shut down, however if you with you could install a simple check valve.


That's assuming that there is 100% liquid in the condensor and line, which most of the time there is not, at least not in these systems.

That's why I recommend a good u-bend, though a check valve should be fine and do the same job.

Gray

[Xeon th MG Pony]

the compressor does indeed, but if you where paranoid about fluid going back on turn off, then a check valve at the point of the Evap (used as condenser) will put your mind to ease, even the U bend isn't really needed as the discharge valve will do its job (Providing it is good)

Due to gas velocities and such the oil will make it through no mater what angle you have the thing really.