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Thread: refrigeration capacities
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18-07-2013, 12:20 PM #1
refrigeration capacities
hi guys,
i am just going through the suppliers catalog. have always wondered , but never studied
what is the relationship between compressor horse power and refrigeration capacities in watts ?
would really appreciate some good links for related studies.
many thanks to this website, and people keeping it.
Thanks.
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18-07-2013, 12:50 PM #2
Re: refrigeration capacities
Try using the search engine:
http://www.refrigeration-engineer.co...-and-Kilowatts
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18-07-2013, 12:52 PM #3
Re: refrigeration capacities
Hi, question mark
http://www.rapidtables.com/convert/power/watt-to-hp.htm
Hope this will be of some help to you ...
Best regards, Josip
It's impossible to make anything foolproof because fools are so ingenious...
Don't ever underestimate the power of stupid people when they are in large groups.
Please, don't teach me how to be stupid....
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Re: refrigeration capacities
Horsepower is the U.S. Conventional unit of measure for mechanical power where watts is the SI Metric unit of measure.
1hp = 746W
1W = .0013hp
1 Refrigeration Ton = 2000 Pounds x 144 BTU per Pound / 24 hours =
12,000 BTU's per Hour
With the BTU value you can determine how much mechanical work is going to be needed.
1 Refrigeration ton = 3,515 Watts or 4.6hp
(Heat that needs to be removed) (Mechanical power needed to remove the heat)
http://www.innovativethermal.com/Art...Horsepower.PDF
http://www.unit-conversion.info/power.html
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18-07-2013, 06:34 PM #5
Re: refrigeration capacities
Refrigeration capacity has nothing to do with horse power, It has to do with evaporating and condensing temperatures.
HP is only the input power of the electric motor.
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19-07-2013, 12:16 AM #6
Re: refrigeration capacities
colder you go the more Hp you need for a given lift at a fixed capacity
so other then that Hp meands nothing in terms of capacity, just the temp lift we need to push.Now in Redvers Sask.
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19-07-2013, 12:18 AM #7
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Re: refrigeration capacities
Yeah, I realized my mistake hours after posting the reply. Disregard comment with apologizes.
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19-07-2013, 04:06 AM #9
Re: refrigeration capacities
it can be a mind bender eh! energy convertions can get confusing.
Now in Redvers Sask.
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19-07-2013, 11:03 AM #10
Re: refrigeration capacities
yea, this is what i wanted to know, surely i didn't draft my question properly
what i wished to know was that how do we input say 1/2 horse power compressor and get 567 watts evopating (input vs output ) capacities, and then how do we make selection for the right txvalve and the orifice size. just looking at suppliers catalogs. what are the different things needs to be considered for selecting condesing units etc.
just wanted to know a little more then just being a part or components changer.
thanks guys
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19-07-2013, 12:58 PM #11
Re: refrigeration capacities
basicaly think of it like a water pump, the higher the lift at a fixed volume, the more powerfull of a pump we need or the more stages we need to reduce the given lift seen to any one of the stages.
to design a system you start at the evap and work your way back.
room load by its self, then you add the product load, then a safety factor of say 25%
then you select the tvx that matches the load and evap you chose, then you size the condensing plant that will handle the load and the ambient temps you'd expect to see
Now for that 1/2Hp @ 567w that is at a low evap temp look at its higher temps and you'll see that number go way up as there is les "lift" compression ratio
Fyi I typed this in the morning befor coffee so take it as you will, now for coffee!Now in Redvers Sask.
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19-07-2013, 09:35 PM #12
Re: refrigeration capacities
thanks a lot mate , i m also reading it before going to work in 30 seconds , hahah thankss again