TTerry
New Member
Posts:13
 |
| 30 Nov 2010 03:55 PM |
|
I have a 6 ton Geocomfort combination unit that I'm installing and thinking ahead to when Time of use rates are in place(Ontario, Canada) I would like to reduce compressor run during peak electrical rate times. Would it make sense to have more buffer tanks to store hot water to run thru a hot water coil in the plenum. I already have the coil as its my emergency backup. I would need about 3 hrs worth morning and night. Is there any other way to accomplish this? Thanks |
|
|
|
|
|
|
geome
Advanced Member
Posts:987
|
| 30 Nov 2010 04:26 PM |
|
I'm curious - how do you plan to address stagnant water in the coil when this part of the system is not in use (and possibly mixing with DHW)? |
|
| Homeowner with WF Envision NDV038 (packaged) & NDZ026 (split), one 3000' 4 pipe closed horizontal ground loop, Prestige thermostats, desuperheaters, 85 gal. Marathon. |
|
|
TTerry
New Member
Posts:13
|
| 30 Nov 2010 05:04 PM |
|
Our old heating system was a outdoor wood boiler that indirectly heated water in our oil fired DHW heater which was turned off in the winter. From there it travelled to the hot water coil in plenum on demand during heating season. But you are correct, there would be stagnant water in the coil 3 or 4 months of the year. We still have the oil fired heater( turned off) as our DHW tank which my DSH will go to. The storage tanks that I'm thinking about would be upstream from the DHW. Terry |
|
|
|
|
jonr
Senior Member
Posts:5341
|
| 30 Nov 2010 06:25 PM |
|
Sure, depending on the numbers, you can save money when you have the excess capacity to heat a tank. What is the concern about stagnant, ~75F water?
|
|
|
|
|
rmichael
New Member
Posts:4
|
| 01 Dec 2010 10:20 PM |
|
I just use the thermal mass of the house to reduce my units run time during peek hours. The thermostat is programed to raise or lower house temperature by 2-4 deg F two hours before the rates change. I get a lot more stage two run time but I rather have a COP of 4 at $0.05 per KWH than a COP of 5 at $0.15 per KWH. I use slightly more electricity but it saves money.
In the winter it's nice to wake up to a nice toasty house and when it shuts down at 7 AM it doesn’t run again till mid afternoon.
Peek hours 7AM-8PM
thermostat settings
5:00AM 72F
7:00AM 68F
8:00 PM 70F |
|
|
|
|
Palace Geothermal
Veteran Member
Posts:1609
|
| 01 Dec 2010 10:34 PM |
|
Way to work the system |
|
Dewayne Dean
<br>www.PalaceGeothermal.com<br>Why settle for 90% when you can have 400%<br>We heat and cool with dirt!<br>visit- http://welserver.com/WEL0114/- to see my system |
|
|
engineer
Veteran Member
Posts:2749
|
| 02 Dec 2010 12:46 AM |
|
Well done.
I had a similar arrangement near Philly years ago. It was intended for water heaters only, but I put my AC on it. It was interruptible, no power from 1PM til 5PM weekdays in summertime. During hot weather I configured a programmable thermostat for 68*F all morning and that pre-cooling coasted through the hot afternoon, mostly. |
|
Curt Kinder <br><br>
The truth is incontrovertible. Malice may attack it, ignorance may deride it, but in the end, there it is - Winston Churchill <br><br><a href="http://www.greenersolutionsair.com">www.greenersolutionsair.com</a>
|
|
|