Klaus
New Member
Posts:8
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| 18 Nov 2009 11:41 AM |
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I beleive that my Geocomfort 410A system uses to much electricity for heating.
If the outside temperartur is below freezing the systems uses approx. 30-40KWh/day.
It is a ground loop system.
Thanks
Klaus |
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geome
Basic Member
Posts:318
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| 18 Nov 2009 04:54 PM |
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I'm a homeowner. Do you know if your electric auxiliary heat is unnecessarily coming on by possibly recovering in the morning from a nigh time temperature setback? If so, you can read some recent threads by doing a search for "aux heat lockout" without the quotes. |
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| WF Envision NDV038 (packaged) & NDZ026 (split), one 3000' 4 pipe closed horizontal ground loop, Prestige thermostats, desuperheaters, 85 gal. Marathon. |
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conniepangan
Basic Member
Posts:110
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| 18 Nov 2009 06:35 PM |
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Klaus, We have the same Compressor brand (GeoComfort). I am also a homeowner so I can only relate with what I have on my bill from one year we have our system. We have 3 ton-2 story, 1800 SF, close loop-vertical, 2 zone and 2 thermostat, 1 stage. We live in New Jersey. As of November of this year, our electric usage average about 14KW a day with the same average temp of 52 degrees. Last December 2008, our usage averaged about 48KW a day with average temp of 40 degrees.
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Klaus
New Member
Posts:8
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| 18 Nov 2009 07:00 PM |
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Thank you for the information. My system is 5 ton and the house has 2500 sqft.  |
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Ona
Basic Member
Posts:173
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| 19 Nov 2009 11:58 AM |
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Here is the data from my 3 ton unit from last year. As you can see, in my situation, the KWh usage tracks the HDD fairly consistently. |
 Attachment: HDDsmall.jpg
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Ona
just trying to make my old home better
www.geochoices.com |
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Klaus
New Member
Posts:8
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| 19 Nov 2009 12:31 PM |
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Thank you very very much, excellent data |
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engineer
Veteran Member
Posts:1495
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| 20 Nov 2009 08:53 PM |
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It is early enough in the heating season that systems with aux strips shouldn't be using them yet.
If yours is now, get help |
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Curt Kinder
Absent data, you have only an opinion.
www.hoviscustombuilders.com
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Klaus
New Member
Posts:8
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| 20 Nov 2009 09:00 PM |
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My aux. heat is disconnected, thank you ! |
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joe.ami
Veteran Member
Posts:1652
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| 23 Nov 2009 07:13 AM |
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If this is a new install compaction may be an issue.
joe |
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Just a Mechanic;
Geothermal; Savings Underfoot |
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retiredeng
New Member
Posts:9
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| 26 Nov 2009 12:32 PM |
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Posted By Ona on 11/19/2009 11:58 AM Here is the data from my 3 ton unit from last year. As you can see, in my situation, the KWh usage tracks the HDD fairly consistently. From what I see of the graph this appears to be a 43 day peroid. If you have data for the whole heating season I would be very interested in seeing the graph or perferrably the raw data and the installation location so I could do an analysis.
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Ona
Basic Member
Posts:173
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| 27 Nov 2009 01:09 PM |
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retiredeng: I tried to send a reply with my raw data in excel format as an attachment, but this system does not allow that. I could not PM you the info either. Not sure how to get you the raw data, but I am interested to hear about your analysis. |
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Ona
just trying to make my old home better
www.geochoices.com |
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engineer
Veteran Member
Posts:1495
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| 27 Nov 2009 02:32 PM |
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OP Klaus gives his location as Janesville, CA. It isn't too far from and at about the same elevation as Reno, NV, which has a design day temp of 11. That suggests that with temps in 30s load might be half of design. That might translate into 6 hours of daily operation. A 5 ton system producing 50k Btuh at a COP of 3.0 operating for 6 hours would use 29.3 kwh. Throw in some cycling losses and some errors in the above assumptions and 30-40 kwh per day isn't out of the question.
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Curt Kinder
Absent data, you have only an opinion.
www.hoviscustombuilders.com
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Klaus
New Member
Posts:8
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| 27 Nov 2009 04:24 PM |
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Thank you, your assumptions are pretty close, but I'm using up to 20-30% more. The elevation of my house is also a little higher (~300 ft) than Reno.
Klaus |
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joe.ami
Veteran Member
Posts:1652
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| 27 Nov 2009 06:11 PM |
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Posted By joe.ami on 11/23/2009 7:13 AM
If this is a new install compaction may be an issue.
joe Is it? j |
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Just a Mechanic;
Geothermal; Savings Underfoot |
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Klaus
New Member
Posts:8
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| 27 Nov 2009 07:22 PM |
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No, it was installed last year in July. |
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engineer
Veteran Member
Posts:1495
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| 28 Nov 2009 08:54 AM |
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We might be at the limits of internet support without some hard data - run times and airside / waterside flows and delta-Ts, unit amps, etc. |
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Curt Kinder
Absent data, you have only an opinion.
www.hoviscustombuilders.com
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joe.ami
Veteran Member
Posts:1652
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| 28 Nov 2009 07:18 PM |
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Posted By Klaus on 11/27/2009 7:22 PM
No, it was installed last year in July. 08? |
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Just a Mechanic;
Geothermal; Savings Underfoot |
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Klaus
New Member
Posts:8
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| 28 Nov 2009 09:20 PM |
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Yes, 08. |
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joe.ami
Veteran Member
Posts:1652
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| 30 Nov 2009 01:18 PM |
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What was last years consumption. Is system independantly metered?
Joe |
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Just a Mechanic;
Geothermal; Savings Underfoot |
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Klaus
New Member
Posts:8
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| 30 Nov 2009 02:20 PM |
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The system is not independantly metered. The power consumption during Nov/Dec 08 was approx. 60-70 KWh daily.
Klaus |
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