Charging by weight question

[fat eddy]

HIgh Mall,

Wave yur hand please, you look like yur pretty far down there buddy, wait a minute oh know thats not High Mall Drifter its Norm and the guy with four initials.

HELLOOOO down there can you heaer ear ear me down there Norm, hold on buddy I'll come and get ya I know ya took that one pretty hard I didn't mean to hurt ya though honest I didn't.

Patty will you try to keep those guys from hitting bottom while I hike down there ?

[dpatty]

so what kind of operating range would you say cap tube systems have. I have seen txv's operate over a several ton range.

could you say, take the cap tubes from a 3 ton evap and use them on anything from say 2 ton to 4 ton just as an example. if not why, I would consider an oprating range the defining charictaristic of a modulating metering device. Prove that then you may have a chance of actually winning this.

[airmechanix]

...this, is what makes me love this forum...humorous yet informative

Keep up the good work!

[fat eddy]

I never made claim that it was a good metering device or very versatile just simply stated that it is a modulating metering device and I got nothing but greif for my sincere efforts.

The cap tubes claim to fame was that it was more economical than the other devices of its day and that it nearly by itself propelled the domestication of small refrigeration systems.

[rsmith46]

Fast Eddy, you really should think about teaching seminars to enlighten other tradesmen. Somebody sure has had fun teaching you.

[dpatty]

i agree with you except for the modulating part. it is a action reaction device with known outcomes under known conditions and they do not change. that is the nature of fixed metering devices. a modulating device can change those outcomes or maintain them under other conditions

[fat eddy]

I then will assume that a TXV's reaction to an action is unknown and therefore it must truly be an uncontrollable but none the less modulating metering device, but wait a minute wait a minute here I think I remember reading somewhere that it was very well known how it would react to temperature change at the bulb wow wow wow this is great we are truly getting somewhere now if we are not very very careful we might discover something new to the field here tonight, since the reaction to an action is predictable the TXV must certainly be a fixed metering device, Nah, I'm going to go with modulating.

Give it up yur outmanned and I got to get some sleep.

Oh yeah I read that in the instructions.I remember it now, the little blue and white piece of paper with the label "read this first" on it.

[dpatty]

Lets take a poll.

Has anyone even began to think that on any level that fat eddie know what he is talking about?

I think I know what he talking about but I don't think anyone would define it as modulation much less to say that the device used is modulating.

unfortunately eddie I have to go to bed 5am comes to early in the morning to stay up debating this. I can say it has been fun.

I'll be back tomarrow

[Wild Leg]

A modulating device with NO moving parts.

Can you name another?

[Carnak]

Originally posted by dpatty
Lets take a poll.

Has anyone even began to think that on any level that fat eddie know what he is talking about?

I think I know what he talking about but I don't think anyone would define it as modulation much less to say that the device used is modulating.

unfortunately eddie I have to go to bed 5am comes to early in the morning to stay up debating this. I can say it has been fun.

I'll be back tomarrow

No I gave up on him when he told a HO to use B-vent for oil. He saw the error of his way on that one eventually.

[svtti123]

Some interesting information on cap tubes and more.



http://www.climaticcontrol.com/info/...ec_8(rev1).htm Home Page[/url]


[Edited by svtti123 on 02-15-2005 at 02:03 AM]

[Carnak]

That is an interesting article svtti, it is the first thing in this thread that mentions subcooling which seems to be the key to it all.

The cap tube is still at the mercy of what leaves the condenser, a little more subcooling seems to compensate a bit for reduced head pressure.

More subcooling, less flash, more mass flow rate. I never thought of it as liquid having a higer velocity, I always thought of it as liquid having more mass.

[Carnak]

Same arguement would apply to distributer tubes after an orifice