Previous in Forum: Pressure Guage   Next in Forum: Turbines
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
7 comments
Rate Comments: Nested
dmtonyole
Commentator

Join Date: Dec 2006
Posts: 77

Sanyo Split Unit Air-Conditioner

03/11/2013 6:31 AM

I want to buy an air-conditioner with 24,000BTU. the supplier delivered an air-condtioner with the following specifications:

COOLING CAPACITY: 7kW

ACTUAL COOLING CAPACITY: 21.500BTU

I understand 7kw is equivalent to 24,000BTU

What is the difference between cooling capacity and actual cooling capacity as far as aircondition specification is concerned.

Rgards

Mtonyole
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: Sanyo split unit air-conditioner

03/11/2013 6:38 AM

Depending on the size, method of construction, insulation level and power dissipated within the building, the difference may be between a fraction of a degree and several degrees celsius.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#2
In reply to #1

Re: Sanyo split unit air-conditioner

03/11/2013 7:20 AM

Add insolation/cloud cover, day length, and air temprature/humidity/barometric pressure to that list of variables.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
RAMConsult
Guru
Engineering Fields - Power Engineering - New Member

Join Date: May 2007
Location: NYC metropolitan area.
Posts: 3230
Good Answers: 444
#3

Re: Sanyo Split Unit Air-Conditioner

03/11/2013 12:13 PM

There are losses in all real devices, nothing is 100% efficient. Your AC draws the equivalent of 24,000 Btus, but only does the cooling equivalent of 21,500 Btus. The "missing" 2,500 Btus goes into the work of moving the refrigerant around, removing the heat from the compressor, and running the fans that remove the heat from the coils.

__________________
 “Tell me and I forget. Teach me and I remember. Involve me and I learn.” Ben Franklin.
Register to Reply
dmtonyole
Commentator

Join Date: Dec 2006
Posts: 77
#4
In reply to #3

Re: Sanyo Split Unit Air-Conditioner

03/11/2013 1:02 PM

Thanks for a good answer
Register to Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#5
In reply to #3

Re: Sanyo Split Unit Air-Conditioner

03/11/2013 5:22 PM

"nothing is 100% efficient"

An electric furnace within the ' to be conditioned ' space is 100% efficient....

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply
RAMConsult
Guru
Engineering Fields - Power Engineering - New Member

Join Date: May 2007
Location: NYC metropolitan area.
Posts: 3230
Good Answers: 444
#6
In reply to #5

Re: Sanyo Split Unit Air-Conditioner

03/11/2013 7:00 PM

As long as you're splitting hairs, there are losses in the lines leading to the conditioned space, but I agree that it is 100% efficient converting the energy that is presented to it.

__________________
 “Tell me and I forget. Teach me and I remember. Involve me and I learn.” Ben Franklin.
Register to Reply
dmtonyole
Commentator

Join Date: Dec 2006
Posts: 77
#7
In reply to #3

Re: Sanyo Split Unit Air-Conditioner

03/13/2013 3:02 PM

When i want to buy an airconditiner should i specify the nominal Cooling capacity or the actual cooling capacity? and why?
Register to Reply
Register to Reply
Have a Different Question?
7 comments
Copy to Clipboard

Users who posted comments:

dmtonyole (2); PWSlack (2); RAMConsult (2); SolarEagle (1)

Previous in Forum: Pressure Guage   Next in Forum: Turbines

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Mechanical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (86 right now)
Show Members
Advertisement