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Groups > sci.electronics.design > #431094
| From | Winfield Hill <hill@rowland.harvard.edu> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: heatpump vs furnace |
| Date | 2016-10-13 06:10 -0700 |
| Organization | Rowland Institute |
| Message-ID | <nto13n02nng@drn.newsguy.com> (permalink) |
| References | <nt8opm01slg@drn.newsguy.com> <pn4gvbhdutngkknagei0ubi8lek3umc7v7@4ax.com> <7942cded-2356-4781-b01a-894d7459b962@googlegroups.com> |
makolber@yahoo.com wrote...
>
> They claim
>> heatpump heating is cheaper than oil, but I doubt
>> it! Anybody have experience with a hybrid system?
>
> Yes, I have a hybrid oil heat pump system.
> My COP is about 3 and that makes oil at $2.00 per gallon
> equivalent to about $0.18 per kWh of electricity.
> So it depends on what YOU pay for each fuel.
My Carrier 25HCC5 heatpump's COP is 3.88 with
47 deg (+8C) air, dropping to 2.64 with cold
17-deg (-8C) air. For 40 to 50-deg settings,
and our $0.20 elec, isn't that close to a wash?
> And the heat pump compressor includes a crankcase
> heater that runs 100 Watts 24/7 to keep it warm so
> it can start anytime. Freon will migrate to the
> coldest part of a system when it is off and you
> don't want your compressor full of liquid Freon
> when it starts, so they keep a heater running in it 24/7.
Whoa! 100 watts 24-7 = $175/yr. (Sadly I have
2 to 3 times that already in wallworts, etc.)
> My bottom line is, once the temp is consistently
> below about 35, I turn off the heat pump, switch
> off its breaker to kill the heater, and keep it
> from coming on, and I stick with the oil. I just
> hope oil stays around $2 per gallon.
>
> In spring I turn the breaker back on a few days
> before I let it run so it warms enough to drive
> the liquid Freon out before I let it start.
> And below about 32 the outside coils can freeze up and the
> system has to run in reverse defrost mode for a few minutes.
Yes, we have that aspect.
--
Thanks,
- Win
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10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-07 11:16 -0700
Re: 10 mega-watt hours Jon Elson <jmelson@wustl.edu> - 2016-10-07 14:13 -0500
Re: 10 mega-watt hours Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-07 12:41 -0700
Re: 10 mega-watt hours makolber@yahoo.com - 2016-10-07 13:08 -0700
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-07 14:27 -0700
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-07 14:09 -0700
Re: 10 mega-watt hours Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-07 14:18 -0700
Re: 10 mega-watt hours Ralph Barone <ralph@invalid.com> - 2016-10-07 22:40 +0000
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-07 16:42 -0700
Re: 10 mega-watt hours Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-07 17:35 -0700
Re: 10 mega-watt hours Jeff Liebermann <jeffl@cruzio.com> - 2016-10-08 09:09 -0700
Re: 10 mega-watt hours John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-08 09:53 -0700
Re: 10 mega-watt hours Jeff Liebermann <jeffl@cruzio.com> - 2016-10-08 11:10 -0700
Re: 10 mega-watt hours Bob Engelhardt <BobEngelhardt@comcast.net> - 2016-10-09 12:30 -0400
Re: 10 mega-watt hours Jeff Liebermann <jeffl@cruzio.com> - 2016-10-09 10:26 -0700
Re: 10 mega-watt hours Ralph Barone <ralph@invalid.com> - 2016-10-08 23:38 +0000
Re: 10 mega-watt hours Jeff Liebermann <jeffl@cruzio.com> - 2016-10-08 18:13 -0700
Re: 10 mega-watt hours Ralph Barone <ralph@invalid.com> - 2016-10-09 05:02 +0000
Re: 10 mega-watt hours Jeff Liebermann <jeffl@cruzio.com> - 2016-10-08 23:29 -0700
Re: 10 mega-watt hours Chris Jones <lugnut808@spam.yahoo.com> - 2016-10-09 11:42 +1100
Re: 10 mega-watt hours Martin Riddle <martin_ridd@verizon.net> - 2016-10-07 17:30 -0400
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-07 17:14 -0700
Re: 10 mega-watt hours Jon Elson <elson@pico-systems.com> - 2016-10-11 10:28 -0500
heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-12 05:57 -0700
Re: heatpump vs furnace bill.sloman@ieee.org - 2016-10-12 07:33 -0700
Re: heatpump vs furnace "dcaster@krl.org" <dcaster@krl.org> - 2016-10-12 17:41 -0700
Re: heatpump vs furnace bill.sloman@ieee.org - 2016-10-12 18:26 -0700
Re: heatpump vs furnace "dcaster@krl.org" <dcaster@krl.org> - 2016-10-13 06:45 -0700
Re: heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-12 18:57 -0700
Re: heatpump vs furnace bill.sloman@ieee.org - 2016-10-12 22:36 -0700
Re: heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-13 03:57 -0700
Re: heatpump vs furnace Ecnerwal <MyNameForward@ReplaceWithMyVices.Com.invalid> - 2016-10-12 10:33 -0400
Re: heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-12 09:46 -0700
Re: heatpump vs furnace Ecnerwal <MyNameForward@ReplaceWithMyVices.Com.invalid> - 2016-10-12 14:39 -0400
Re: heatpump vs furnace Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-12 08:10 -0700
Re: heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-12 09:39 -0700
Re: heatpump vs furnace makolber@yahoo.com - 2016-10-12 13:02 -0700
Re: heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-13 06:10 -0700
Re: heatpump vs furnace "David Eather" <eather@tpg.com.au> - 2016-10-15 14:47 +1000
Re: heatpump vs furnace krw <krw@nowhere.com> - 2016-10-15 10:56 -0400
Re: heatpump vs furnace "David Eather" <eather@tpg.com.au> - 2016-10-17 12:47 +1000
Re: heatpump vs furnace krw <krw@nowhere.com> - 2016-10-17 19:50 -0400
Re: 10 mega-watt hours sean.c4s.vn@gmail.com - 2016-10-12 06:13 -0700
Re: 10 mega-watt hours Yzordderrex <powersupplyguy@netzero.net> - 2016-10-13 07:52 -0700
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-13 08:09 -0700
Re: 10 mega-watt hours Yzordderrex <powersupplyguy@netzero.net> - 2016-10-14 03:05 -0700
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-14 05:52 -0700
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