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Variable Speed residential motors ; too long a payback ??

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Variable Speed residential motors ; too long a payback ?? HVAC fella 06-10-2007
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Posted by HVAC fella on June 10, 2007, 12:58 pm
On a fractional h.p. blower motor thats variable speed....is there any
data published on expected electrical savings for a residential AHU
application ?


Posted by Bill on June 10, 2007, 4:16 pm
HVACfella@webtv.net (HVAC fella) wrote:

> On a fractional h.p. blower motor thats variable speed....is there any
> data published on expected electrical savings for a residential AHU
> application ?

Yes but you'd have to subscribe to a trade mag like the RSES Journal.

--
http://hotair.com/

Posted by Jeffrey Lebowski on June 10, 2007, 11:45 pm

> On a fractional h.p. blower motor thats variable speed....is there any
> data published on expected electrical savings for a residential AHU
> application ?
>

http://www.fucktheskullofjesus.com/

--




Posted by Wu Tang on June 12, 2007, 8:36 am
HVAC fella wrote:
> On a fractional h.p. blower motor thats variable speed....is there any
> data published on expected electrical savings for a residential AHU
> application ?

if you search google with the argument (without quotes) "variable speed energy
savings", you will locate several document which address the issue

empirically, you can calculate an approximate estimate, considering an average
hp vs
motor consuming 42w versus 1000w (or more) for a non-vs motor, using an average
cost
of electricity at 0.13 cents/kWh (use appropriate rate for your region)

in a modern hp installation, other factors come to play when calculating length
of
payback, not only the single component of variable speed blower






Posted by Tony on June 12, 2007, 6:15 pm
Why did you have to say that now he is totally confuse including Mua!
tony


> HVAC fella wrote:
>> On a fractional h.p. blower motor thats variable speed....is there any
>> data published on expected electrical savings for a residential AHU
>> application ?
>
> if you search google with the argument (without quotes) "variable speed
> energy savings", you will locate several document which address the issue
>
> empirically, you can calculate an approximate estimate, considering an
> average hp vs motor consuming 42w versus 1000w (or more) for a non-vs
> motor, using an average cost of electricity at 0.13 cents/kWh (use
> appropriate rate for your region)
>
> in a modern hp installation, other factors come to play when calculating
> length of payback, not only the single component of variable speed blower
>
>
>
>
>



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