Page 1 of 1

which power specification is correct?

Posted: Wed, 07 Nov 2018, 08:42
by Adverse Effects
the Specs say

2.5HP
6kW
15Amps

that cant work can it?

2.5HP = ~1.86kW / 240VAC = ~7.7677Amps
6kW /240VAC = 25Amps
15Amps * 240VAC = 3.6kW

Window Wall Cooling Only Air Conditioner 6kW

Image

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 08:50
by antiscab
No power factor correction would be my guess. Also hp wouldnt include fans

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 09:16
by Adverse Effects
my point was
how can a 6kW airco have 2.5HP and only draw 15 amps

when
2.5HP = ~1.86kW / 240VAC = ~7.7677Amps
6kW /240VAC = 25Amps
15Amps * 240VAC = 3.6kW

none of those amounts come close to matching

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 09:48
by jonescg
Sometimes they refer to the 'cooling power' or the rate of heat removal. That would be closer to 1.8 kW I'd think.

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 10:48
by T1 Terry
Cooling/heating kW is not necessarily electrical energy used, the EER or COP comes into play. The current rating is to allow for a stalled compressor so it doesn't trip the circuit breaker every time it cycles back in as the compressor usually stops on a compression stroke.
Soft start air con units bleed off the head pressure and start the fans up before the compressor to stagger the load, inverter technology starts the compressor at a very slow spin after the fans are up to speed so a very soft start. The part that catches a lot of people is that inverter technology air conditioners do ramp up to full load plus a bit until they pull the temp down and only then do they reduce the compressor speed to match the load required. Not unusual to see an inverter technology unit ramp up to a 4kW electrical load for 20 mins after start up before it drops back to as little as a 1.2kW electrical load and then back to maybe 750w if the insulation is good.

T1 Terry

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 11:28
by brendon_m
jonescg wrote:
Wed, 07 Nov 2018, 09:48
Sometimes they refer to the 'cooling power' or the rate of heat removal. That would be closer to 1.8 kW I'd think.
This is it, its equivalent to a 6kw bar heater, it's just 200ish% efficient because it's taking energy from the air outside (or inside when cooling) as well as the power lines.

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 14:18
by Adverse Effects
so its a overunity device

takes ~7.7677Amps from the wall (~7.7677Amps * 240VAC = 2.5HP) then outputs 6kW of cooling from the said ~7.7677Amps

so that is a ~322% increase in power over what is put in it from the wall

and so on that math you should be able to string them together and make positive power out put (i know this cant happen but the numbers dont lie LOL )

PS:-no i am not an overunity nutcase

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 15:45
by brendon_m
It's free energy!
Big oil has been keeping it under wraps for years.

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 15:53
by Johny
brendon_m wrote:
Wed, 07 Nov 2018, 15:45
It's free energy!
Big oil has been keeping it under wraps for years.
Not quite but is is true that for the same electrical power input, a heat exchanger provides almost twice the cooling power and about 150% more heat than a purely resistive heater.
The heat pump hot water salesfolk call it "heat from the air" or similar.

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 16:52
by brendon_m
I think you missed the sarcasm.
However it is technically free energy, you're taking heat energy from the air which power companies haven't worked out how to charge us for (yet), so it's energy for free.

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 20:42
by Johny
brendon_m wrote:
Wed, 07 Nov 2018, 16:52
I think you missed the sarcasm.
.....
Sorry Brendon, I should have read more closely who posted that remark. I know from your previous posts that you wouldn't have been serious. The over-unity debate got pretty hot here a couple of years ago.

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 22:08
by brendon_m
No worries, I know tone and meaning is lost in text.

Re: which power specification is correct?

Posted: Wed, 07 Nov 2018, 22:44
by Adverse Effects
brendon_m wrote:
Wed, 07 Nov 2018, 15:45
It's free energy!
Big oil has been keeping it under wraps for years.
ROFL

Re: which power specification is correct?

Posted: Thu, 08 Nov 2018, 12:49
by Richo
brendon_m wrote:
Wed, 07 Nov 2018, 16:52
However it is technically free energy
Yes global warming IS free!
Remember it's only free until you get caught :lol:

We are currently on the buy it now and pay for it later plan :o
And that balloon payment is fast approaching :arrow:

Re: which power specification is correct?

Posted: Thu, 03 Jan 2019, 08:21
by woody
Better late than never - this is my understanding...

Cooling:
~6kW of heat comes out of the intake air
~2kW comes from electricity
~8kW of heat goes into the outside air
----
0kW sum

Heating:
~7kW of heat goes into the air coming out of the blower
~2kW of that comes from electricity
~5kW of that comes from outside air
----
0kW sum

Current Rating Amps 15A = shouldn't blow the fuse on a 15A circuit - it may go over that momentarily and will be under it by a long way mostly.