HVAC-Talk: Heating, Air & Refrigeration Discussion banner
Cancel
Create thread New Forums

High superheat with NU22B

Jump to Latest
41 - 60 of 62 Posts
Discussion starter · #42 ·
Poodle Head Mikey said:
But you are talking about two different things here.

Of course total refrigeration effect is not the same thing as total heat of rejection.

So also of course less than 18 tons (about 209K BTU's) resulted in 262K BTU's of heating - there is no way around it. THR tends to always be about 125% of TRE. That doesn't change the fact that 12K BTU's is considered to be one ton of cooling. <g>

And also; I learned long ago that equipment manufacturer's rating are "nominal". <g> Maybe they don't seal them well enough for shipping because some of the tons always seem to leak out on the way to the job site. Or maybe the truckers steal some of the tons because now that I'm thinking about it; you never see any lost tons laying around by the side of the road. But the tons do seem to get lost somewhere in transit - because somehow or other a 300 ton machine in the factory never seems to ever do 300 tons worth of cooling on the job. <g>

PHM
------
Click to expand...
I would tend to disagree on water cooled chillers, at least the newer ones. A 1250 ton Trane centrifugal chiller ( maybe others too) can easily produce well over 1250 tons if piping, CW temp and controls are setup and installed correctly. I take care of a critical facility with 4100 tons of rated chiller capacity and it can produce more than 4100 tons. THR changes significantly though with high humidity and/or temps over 100 degrees OAT on cooling towers.
Now on RTU's, there is always waste and leakage in everything I have ever come across.
 
#44 ·
Jbart said:
I would tend to disagree
Click to expand...
with 1st)
of course they are 2 different things...
PHM:
I was just prentin' the dif between
"22 tons" heat out at only 18 tons at cooling the 300 gal tank to 38f
which had
then the ratio for the tincan r22 recip at like conditions on the compressor charts of any website

a real in-field surprise to me until I looked it up to see NOTHING WAS WRONG there, poorly so.

wow!
you know I believe ya know it---
22/18 11/9 over the label rating INSIDE the "chiller" : 90% net cooling at a 10-deg Td resulting in a 38 deg tank and 11-12% mo' hotta mo' betta if that is to your needed liking in say some heat recovery to something else::
it is like designing rejected heat to groundloops or air or whatever work is displaced: every COOLING 12k "TON" requires 20% to 25% MORE tons of heat transfer capability, that's all. It is easy to forget, regardless of outer-box stickers.

w:w had the outside label match the inside compressor BTUh all along that I used. Ratings so easy to be consistently read by anyone HAD TO BE SO.
-- in comparison to most AIR-Boxes tied in, the ratings for typical 28k in say CM GT get it "called" a 3 ton,
while other OEM's still (and always) called it as it was INSIDE labeled a 2and1/2 ton-- I used both so I paid att to that throughout th 90's to date. that's all.

PHM nor I were in any disagreement that a RATING PUBLISHED in any given condition was any less than net capacity in that situation...
JUST noting like that all,

I was very surprised when the 10 year old coolig tower of 75 tons 90-deg/85% hum- whatever could not handle (cleaned and screamin') the Yzk dbl efc distilled water chiller I first-of-those learned on with the texas rep in 2001, pointing out the 90-"tons" of heat from the gas combustion to HW rejected for the nearly 47 tons of net usable cooling on a 50-ton rated - well used "gas-fired-chiller"... 90% more heat than rated "tons" net cooling. (just noted, that's all)

we planned a hybrid to GT ground coupling immediately ! NO. Owners number 3 ---in 5 years would not do it either... planning a rev cycle was too costly to them too.
 
#45 ·
VAL:

I would only be "sure", politely- which to me really-really-'sure'= just that same word: sure ---
after the ICOR fellas were spoken with...

I have had hours of good- , and they noted reality- without displaced- conversation.
 
#46 ·
GT1980, you can admit it to us, you're doing drugs... ;)

Or I'm getting too old to do this blogging thing. :eek2:
 
Save
Like Like
#48 ·
Dam! So maybe I am being sucked into the vortex then - because I thought I was finally getting the hang of it. <g>
 
Save
Like Like
#50 ·
Andy Schoen said:
...o this blogging thing. :eek2:
Click to expand...
I tol U the chocolate ! but U don't read well without yo glasses, yes?

one says "I am sure ICOR...."

and I am only sure, as really sure some say, if IASK THEM FIRST then get some facts, and ask again; then run it before the church...

how easy it is to run before the crowed with the lynch mobile before just going one on one, eh?

ICOR never overestimated their lines to me, but I asked with the piddly facts I mustered up before the call TO THEM first; and
"hours of good conversation--- and not displaced factual admissions from them in their technical bubles/dews and other points

I took notes, i too scribble on machines because situation-ally it is to me about of so many various applications of absolute thermodynamics.


If one really follows the reading , "for sure", then one asks at the point of misunderstanding, formulating a thread-related Question... as those I have trained so do, until the unforeseen information finally arrives to go to the next question.
 
#51 ·
Andy Schoen said:
GT1980, you can admit it to us, you're doing drugs... ;)

Or I'm getting too old to do this blogging thing. :eek2:
Click to expand...
you beat me to it. perhaps he TWEETS too much and is trying to get all of his 'sayins' in under 140 characters...let's count...1...2...3...4...
 
Save
Like Like
#52 ·
#53 ·
GT1980 said:
so you called ICOR or was that JTR, or did Val finally?

U guys 2 funny, all. hahaha
Click to expand...
I'll ask directly.

What is your first language?

From your syntax, it cannot be standard English.
 
#54 ·
Let's all take a guess

From the basic cadence I would guess French. Non?

PHM
-------




timebuilder said:
I'll ask directly.

What is your first language?

From your syntax, it cannot be standard English.
Click to expand...
 
Save
Like Like
#55 ·
my guess is Spanish-Arabian...just like my GPS.
 
Save
Like Like
#58 ·
Tiens!

Etes-vous du Francais ou pas? Peut-etre au moins?

PHM
-------


ruuufuhbock said:
I'm going to piggy back a little and say French Canadian, I saw an "eh" in a post earlier
Click to expand...
 
Save
Like Like
#59 ·
Save
Like Like
41 - 60 of 62 Posts
You have insufficient privileges to reply here.
About this Discussion
61 Replies
18 Participants
Last post:
Cmstech
HVAC-Talk: Heating, Air & Refrigeration Discussion
posts
5M
members
275K
Since
2000
The #1 HVACR Community
Full Forum Listing
Explore Our Forums
AOP Residential HVAC/Refrigeration(Beenthere Zone) General Discussion Tech to Tech Chat - Residential Controls Refrigeration & Ice Making