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Groups > sci.electronics.design > #430567 > unrolled thread

10 mega-watt hours

Started byWinfield Hill <hill@rowland.harvard.edu>
First post2016-10-07 11:16 -0700
Last post2016-10-14 05:52 -0700
Articles 7 on this page of 47 — 18 participants

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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

Page 3 of 3 — ← Prev page 1 2 [3]

#431498 — Re: heatpump vs furnace

From"David Eather" <eather@tpg.com.au>
Date2016-10-17 12:47 +1000
SubjectRe: heatpump vs furnace
Message-ID<op.ypgh13swwei6gd@phenom-pc>
In reply to#431299
On Sun, 16 Oct 2016 00:56:04 +1000, krw <krw@nowhere.com> wrote:

> On Sat, 15 Oct 2016 14:47:39 +1000, "David Eather" <eather@tpg.com.au>
> wrote:
>
>> On Wed, 12 Oct 2016 22:57:37 +1000, Winfield Hill
>> <hill@rowland.harvard.edu> wrote:
>>
>>> Jon Elson wrote...
>>>> Winfield Hill wrote:
>>>>> Martin Riddle wrote...
>>>>>>
>>>>>> Do your power credits roll over to the next year? (anniversery date)
>>>>>> I think your allowed to change it once. And most recomend to place  
>>>>>> it
>>>>>> in April/May, so the winter bills can be offset.
>>>>>> You may find that your Jan/Feb bill are 'high'
>>>>>
>>>>> I don't know for sure, but my understanding is the
>>>>> credits do not expire.  However, if we make more
>>>>> than we consume, we don't get paid for any excess.
>>>>> But we can give it to someone else in our district.
>>>>> Like maybe our town's Senior Citizens Center.
>>>>>
>>>> WOW!  They ALLOW you to give the utility energy for
>>>> free!  What an incredibly generous deal!
>>>
>>>  We just replaced our entire HVAC-oil-furnace stack,
>>>  and elected the heat-pump option instead of a simple
>>>  AC compressor.  I've been taking some performance
>>>  measurements, e.g. with Tout = 45 deg, it takes the
>>>  heatpump about 1 hour to raise the house temp by 2
>>>  degrees.  It consumes 5kW, so that's 2.5kWh/deg.
>>>  Whoa, we'll be using far more electricity than our
>>>  roof makes!  The default outside-temp breakpoint
>>>  for switching to the oil burner is 40 degrees.
>>>  I'm studying the thermostat manual's installation
>>>  instructions to change to 50 degrees.  They claim
>>>  heatpump heating is cheaper than oil, but I doubt
>>>  it!  Anybody have experience with a hybrid system?
>>>
>>>
>>
>> don't worry too much - the waste energy turn into heat too
>
> If your intention it to heat the great outdoors.

yeah but half the waste heat goes indoors

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#431578 — Re: heatpump vs furnace

Fromkrw <krw@nowhere.com>
Date2016-10-17 19:50 -0400
SubjectRe: heatpump vs furnace
Message-ID<5uoa0chqdipgh8c6re996dahslsrpki12j@4ax.com>
In reply to#431498
On Mon, 17 Oct 2016 12:47:53 +1000, "David Eather" <eather@tpg.com.au>
wrote:

>On Sun, 16 Oct 2016 00:56:04 +1000, krw <krw@nowhere.com> wrote:
>
>> On Sat, 15 Oct 2016 14:47:39 +1000, "David Eather" <eather@tpg.com.au>
>> wrote:
>>
>>> On Wed, 12 Oct 2016 22:57:37 +1000, Winfield Hill
>>> <hill@rowland.harvard.edu> wrote:
>>>
>>>> Jon Elson wrote...
>>>>> Winfield Hill wrote:
>>>>>> Martin Riddle wrote...
>>>>>>>
>>>>>>> Do your power credits roll over to the next year? (anniversery date)
>>>>>>> I think your allowed to change it once. And most recomend to place  
>>>>>>> it
>>>>>>> in April/May, so the winter bills can be offset.
>>>>>>> You may find that your Jan/Feb bill are 'high'
>>>>>>
>>>>>> I don't know for sure, but my understanding is the
>>>>>> credits do not expire.  However, if we make more
>>>>>> than we consume, we don't get paid for any excess.
>>>>>> But we can give it to someone else in our district.
>>>>>> Like maybe our town's Senior Citizens Center.
>>>>>>
>>>>> WOW!  They ALLOW you to give the utility energy for
>>>>> free!  What an incredibly generous deal!
>>>>
>>>>  We just replaced our entire HVAC-oil-furnace stack,
>>>>  and elected the heat-pump option instead of a simple
>>>>  AC compressor.  I've been taking some performance
>>>>  measurements, e.g. with Tout = 45 deg, it takes the
>>>>  heatpump about 1 hour to raise the house temp by 2
>>>>  degrees.  It consumes 5kW, so that's 2.5kWh/deg.
>>>>  Whoa, we'll be using far more electricity than our
>>>>  roof makes!  The default outside-temp breakpoint
>>>>  for switching to the oil burner is 40 degrees.
>>>>  I'm studying the thermostat manual's installation
>>>>  instructions to change to 50 degrees.  They claim
>>>>  heatpump heating is cheaper than oil, but I doubt
>>>>  it!  Anybody have experience with a hybrid system?
>>>>
>>>>
>>>
>>> don't worry too much - the waste energy turn into heat too
>>
>> If your intention it to heat the great outdoors.
>
>yeah but half the waste heat goes indoors

Then it's not waste.

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#430982

Fromsean.c4s.vn@gmail.com
Date2016-10-12 06:13 -0700
Message-ID<5849117f-e6a9-4cd6-91f2-105eaf727060@googlegroups.com>
In reply to#430567
Time marches on and at some stage Tompson won't be able to actuate a keyboard with his flabby fingers. Does his daughter know what he has actually typed on this forum? He is equally as bad as the worst Muslim misogynist.

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#431104

FromYzordderrex <powersupplyguy@netzero.net>
Date2016-10-13 07:52 -0700
Message-ID<49af876a-7d9b-4bd0-9452-5f76ee64d562@googlegroups.com>
In reply to#430567
On Friday, October 7, 2016 at 2:16:42 PM UTC-4, Winfield Hill wrote:
> The production meter for our solar roof just
>  ticked over past 10MWh.  That's a pretty
>  serious amount of power to generate in the
>  9.5 months since switching on the system.
>  https://enlighten.enphaseenergy.com/pv/public_systems/WAJT773668/overview
> 
> 
> -- 
>  Thanks,
>     - Win

How large is your array - Watts?  Sorry if you already mentioned.

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#431108

FromWinfield Hill <hill@rowland.harvard.edu>
Date2016-10-13 08:09 -0700
Message-ID<nto8390lr@drn.newsguy.com>
In reply to#431104
Yzordderrex wrote...
>
>On Friday, October 7, 2016 at 2:16:42 PM UTC-4, Winfield Hill wrote:
>> The production meter for our solar roof just
>>  ticked over past 10MWh.  That's a pretty
>>  serious amount of power to generate in the
>>  9.5 months since switching on the system.
>>  https://enlighten.enphaseenergy.com/pv/public_systems/WAJT773668/overview
>
> How large is your array - Watts?  Sorry if you already mentioned.

 It's 34 panels, and is rated at 9.5kW, although the
 most we've ever gotten from it is 8.5kW = 250W/panel.
 The link shows roof layout and orientation, 45 deg
 to the southwest.  Click on the photo from the street.
 The arrow on the upper left lets you click through
 different days' results.


-- 
 Thanks,
    - Win

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#431199

FromYzordderrex <powersupplyguy@netzero.net>
Date2016-10-14 03:05 -0700
Message-ID<dafdf8c8-b234-42de-b2f6-85272778385d@googlegroups.com>
In reply to#431108
On Thursday, October 13, 2016 at 11:09:37 AM UTC-4, Winfield Hill wrote:
> Yzordderrex wrote...
> >
> >On Friday, October 7, 2016 at 2:16:42 PM UTC-4, Winfield Hill wrote:
> >> The production meter for our solar roof just
> >>  ticked over past 10MWh.  That's a pretty
> >>  serious amount of power to generate in the
> >>  9.5 months since switching on the system.
> >>  https://enlighten.enphaseenergy.com/pv/public_systems/WAJT773668/overview
> >
> > How large is your array - Watts?  Sorry if you already mentioned.
> 
>  It's 34 panels, and is rated at 9.5kW, although the
>  most we've ever gotten from it is 8.5kW = 250W/panel.
>  The link shows roof layout and orientation, 45 deg
>  to the southwest.  Click on the photo from the street.
>  The arrow on the upper left lets you click through
>  different days' results.
> 
> 
> -- 
>  Thanks,
>     - Win

Ok, good info.  I am in Warner, NH.  The house is new construction and almost move in ready.  We are on a hilltop facing south.  No utilities to the house. We are solar passive with lots of south facing glass and concrete floors to absorb the heat. I have two large masts planted.  I'm thinking to put 8 250W panels on each tracker.  We don't use much electricity except for some old boat-anchor radios.  If I can get 5 or 6 kWh out of the panels each day I should be able to keep place running.  Both wind and hydro possibilities on the property.  Place is going to be an experiment. We are fortunate to have a few hundred years worth of firewood on the property so we should stay cozy.

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#431202

FromWinfield Hill <hill@rowland.harvard.edu>
Date2016-10-14 05:52 -0700
Message-ID<ntqkev01lro@drn.newsguy.com>
In reply to#431199
Yzordderrex wrote...
>
> Ok, good info.  I am in Warner, NH.  The house is
> new construction and almost move in ready.  We are
> on a hilltop facing south.  No utilities to the
> house. We are solar passive with lots of south
> facing glass and concrete floors to absorb the heat.
> I have two large masts planted.  I'm thinking to
> put 8 250W panels on each tracker.  We don't use
> much electricity except for some old boat-anchor
> radios.  If I can get 5 or 6 kWh out of the panels
> each day I should be able to keep place running.

 If your panels track the sun, you'll get far more
 out of them than I get out of mine.  As you can see
 in the graph, bad angles to the sun seriously cut
 the power.  But you also see the cloud scene, bad.
https://dl.dropboxusercontent.com/u/583717/s.e.d/Solar_2016-April-10-18.pdf


-- 
 Thanks,
    - Win

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