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StBarnabas
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« on: October 01, 2009, 06:41:55 PM » |
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Well thought I would start the month on a high note. Good sunshine today 11kWh from the PV and tank at 65 degrees top and 57 bottom when I arrived home. As the ASHP was turned off - I was fitting the remainder of my One-Wire sensors this morning. Mrs B away so hoping for no water draw off. Sadly not to be; nanny hone with JrB and friends. I suspect the entire tank must have gotten to 65 degrees+ at some stage.
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« Last Edit: March 06, 2010, 09:37:12 AM by Paulh_Boats »
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 Gestis Censere. 40x47mm DHW with TDC3. 3kW ASHP, 9kW GSHP, 3kW Navitron PV with Platinum 3100S GTI, 6.5kW WBS, 5 chickens. FMY 2009. |
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Ivan
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« Reply #1 on: October 03, 2009, 04:29:56 PM » |
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No such luck here. A spell of sunny weather mid afternoon - a few hours. Tank temperature ended around 53C, but most of the energy was probably residual from the previous day.
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PhatBob
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« Reply #2 on: October 03, 2009, 06:13:38 PM » |
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Todays scores: 48 at the top, 43 at the bottom, the WBS will have it up to ~67 in a few hours time.
There were a few breaks in the clouds but they were short as the wind was fair pushing them along today.
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30 x 47mm Navitron Tubes.
250l McDonald Engineers DHW Heat store.
Firebelly woodburning stove.
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Hugo
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« Reply #3 on: October 04, 2009, 02:25:00 PM » |
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Blast. I had to turn the gas boiler on today, water was only at 44c top and 23c bottom. Still it's been a good run of hot water this year I'm well pleased with my 30 tubes.  |
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Paulh_Boats
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« Reply #4 on: October 07, 2009, 01:47:10 PM » |
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Rubbish temperatures yesterday... 40 something.  But the boiler pilot light has been off since April  |
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dhaslam
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« Reply #5 on: October 07, 2009, 01:54:28 PM » |
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Starting to cloud over but cylinder over 50C top to bottom. Outside temperature down to 2C last night so it looks like an early winter.
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langstroth2
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« Reply #6 on: October 08, 2009, 05:36:35 PM » |
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A good day to demonstrate tail end of year performance.
Max ambient temp today 13C
Bottom tank start 25C, end 62C
Top tank start 46C, end 65C
..and there was HW draw off during the day aswell.
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Paulh_Boats
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« Reply #7 on: October 08, 2009, 08:11:23 PM » |
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30 tubes/120L/retro coil Top of tank: 32.5C morning 66C evening It never ceases to amaze me how much power we can get on a sunny October day. |
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dhaslam
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« Reply #8 on: October 08, 2009, 10:38:01 PM » |
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Just 12kwh today. Probably about 20% less than would be possible if it didn't cloud over a bit in the afternoon. Cylinder was just under 60C all over. Quite foggy in the morning but only in low areas.  |
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StBarnabas
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« Reply #9 on: October 08, 2009, 10:59:08 PM » |
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DH
great photo! I also did well today 60 degree+ tank and 10kWh PV...
Sean
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Gestis Censere. 40x47mm DHW with TDC3. 3kW ASHP, 9kW GSHP, 3kW Navitron PV with Platinum 3100S GTI, 6.5kW WBS, 5 chickens. FMY 2009. |
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KLD
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« Reply #10 on: October 08, 2009, 11:00:12 PM » |
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Today started out promissing here in Oxfordshire, but it became increasingly cloudy from midday onwards. Well, since I was around all day I took another opportunity to record the temperature rise of the tank over the day, and calculated the heating power from that. The plan is to do this occasionally over a full year, to get a feeling for how the system copes with lower sun and shorter days. Sadly this idea was borne only last month, so not much to show yet. Here are data from two days, 20 Sept and 08 Oct. Total harvested was 5kWh and 4kWh, respectively. The difference is mainly due to a shorter heating period (afternoon clouds) today when compared to the Sept data. The system is 40 47mm tubes into a 216L thermal store, roof slope 36°, facing due South. Klaus NB. The data handling was done in Grace. I haven't figured out how to treat date and time properly, so the time axis is minutes from midnight  The two monotonically rising curves are the tank temperatures (average over three sensors), the shorter one is of today; the bell shaped curves are the corresponding power distributions. Computing these is a multistep process: the temperature data are fitted with a 4-parameter curve (same mathematical formula as is used for binding equilibria in chemistry  ) this curve is smoothed with a cubic spline fit, and finally a pointwise differentiation performed. On today's power distribution curve I also included points for when the cubic spline smoothing step is left out. |
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Paulh_Boats
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« Reply #11 on: October 09, 2009, 12:34:16 PM » |
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Oh my - competitive graph drawing. Its fast becoming an eco pastime! |
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StBarnabas
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« Reply #12 on: October 09, 2009, 04:20:06 PM » |
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Klaus
nice plots will be interesting to see what Grace can do once you get more adept
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Gestis Censere. 40x47mm DHW with TDC3. 3kW ASHP, 9kW GSHP, 3kW Navitron PV with Platinum 3100S GTI, 6.5kW WBS, 5 chickens. FMY 2009. |
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Ivan
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« Reply #13 on: October 09, 2009, 10:43:01 PM » |
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Nothing much to report here. October has been mostly overcast. We've had to heat the water with the boiler once every two days or so. Solar only managing to get the bottom of the tank up to 35C or so. |
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Ivan
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« Reply #14 on: October 12, 2009, 08:20:03 PM » |
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Glorious sunshine all day today. Quite a contrast in weather and solar output.
Managed 6.6kWh from my 1.32kW array.
The solar thermal did well too - at the start of the day, the bottom of the tank was 20C and the top of the tank 39C. By the end of the day, both were at 62C.
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