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Thread: Higher efficiency ac
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09-07-2006, 09:10 PM #1
Higher efficiency ac
Ever wonder what makes a 13 seer different from a 10 seer? I have-and what I've seen from my experience is a difference in the surface area of the coils. I saw a 10 seer Carrier side by side with a 13, used the same compressor, but the condenser was physically larger. Is that all it amounts to? If so, what are the limitations of compressor-to-condenser sizes, i.e., could you use a 3 ton compressor in a 5 ton condenser (for a 3 ton load), and expect a higher efficiency?
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10-07-2006, 07:39 AM #2
Re: Higher efficiency ac
Yes, the bigger the condenser, the higher efficiency expected, provivided SC is within manufacturer spec.
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16-07-2006, 09:49 AM #3
Re: Higher efficiency ac
Hi Guys, would this same principal make an inverter twin split more efficient when only running one of the indoor units?
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16-07-2006, 09:54 AM #4
Re: Higher efficiency ac
Originally Posted by Stoofer
Kind Regards AndyIf you can't fix it leave it that no one else will:rolleyes:
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16-07-2006, 09:58 AM #5
Re: Higher efficiency ac
Originally Posted by Stoofer
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16-07-2006, 10:36 AM #6
Re: Higher efficiency ac
Sorry was meaning Multi split I've been looking at a few sysytems with the view of heating/cooling my conservatory and living room, anyone got views on these systems Mitsubishi SCM45ZD Vaillant V6-060 M2N and I belive Tosh now do a Daiseikai 2 though this maybe beyond my buget.
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16-07-2006, 11:22 AM #7
Re: Higher efficiency ac
Originally Posted by Stoofer
Shop about this is a domestic product and as such should be affordable, try another supplier
Kind Regards AndyIf you can't fix it leave it that no one else will:rolleyes:
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16-07-2006, 11:36 AM #8
Re: Higher efficiency ac
Cheers for the advice Andy that COP really appeals to a double tight Bas***d like me
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16-07-2006, 12:07 PM #9
Re: Higher efficiency ac
Originally Posted by Stoofer
just to note that COP is mid range, these units about 2.5kW in this case. Range is 0.5 to 3.5kW.
Try and select your unit at required duty in this sweet spot
Kind Regards AndyIf you can't fix it leave it that no one else will:rolleyes:
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16-07-2006, 09:06 PM #10
Re: Higher efficiency ac
Sorry to be a bit dense Andy , are you saying if my room requires 2.5kw of duty fit a 3.5kw unit and it will run more effiecently in it's mid range?
I should have the signature "If it's too hard i can't understand it"
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16-07-2006, 09:50 PM #11
Re: Higher efficiency ac
I don't know if Andy meant this but selecting a larger indoor unit is mostly a good solution.
In a non-inverter situation, unit will evaporate higher, so COP will increase.
With an inverter, heatload can be 'absorbed' at a lower speed, so reducing noise. At partial load, compressor will run sooner on a lower speed increasing it's COP.
Also less wearing on the compressor bearings.
When I started many yeras ago, when we installed a Daikin, we allways ordered a bigger indoor size then the outdoor unit.
When is it not a good solution? For those who lives in very humid climates and need to dehumidificate a lot.Last edited by Peter_1; 23-07-2006 at 09:46 PM.
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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16-07-2006, 10:17 PM #12
Re: Higher efficiency ac
Cheer's for the explanation Pete, I'm gonna take Andy’s advice and shop around for a Daiseikai 2 to supply my living room and conservatory, the room unit will get much more use so I'll go for next size up now as dehumidifying isn't really necessary for me.
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16-07-2006, 10:26 PM #13
Re: Higher efficiency ac
Originally Posted by Stoofer
If your room needs 2.5kw a 2.5kW nominal inverter is the one to go for, it already has the over sized indoor, a the 2.5kW will do 3.5kW maximum
Kind Regards AndyIf you can't fix it leave it that no one else will:rolleyes:
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17-07-2006, 01:04 AM #14
Re: Higher efficiency ac
ok cheers for info guys.
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23-07-2006, 05:06 PM #15
Re: Higher efficiency ac
When is it not a good solution, for those who lives in very humid climates and need to dehumidificate a lot."If Hannah was an air handler, I would be a condensing unit so I could open her TXV and pump my refrigerant through her coils." - a HVAC friend of mine
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