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Greenbeast
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« on: September 14, 2009, 08:29:36 AM » |
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my uninterrupted run ended yesterday, after 90 days (every day since install)
i was hoping to scrape through the night for my shower this morning but knew it would only be about 30C, so i put a little in with the boiler last night
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« Last Edit: March 06, 2010, 09:38:36 AM by Paulh_Boats »
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Ivan
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« Reply #1 on: September 20, 2009, 12:40:10 AM » |
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We didn't quite make it to September - had to fire up the boiler on the last day of August, ending an unbroken run of solar-heated water from the 8th March - 30th August.
Since then, we've had one other day (17th September) when we've needed a little additional heat in the cylinder.
In both cases, the cylinder had been heated to 42C or higher - so even so, solar had provided the lion's share.
Greenbeast, if you get your overflow pipe insulated right up to the level of the top of the header tank, you should see an instant reduction of night-time heatloss of 3-4C. Of course, you are getting this heatloss in the day too, but it's masked by use/heat input.....which will push your solar-only days further.
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« Last Edit: September 20, 2009, 10:53:34 PM by Ivan »
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Flamethrower_
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« Reply #2 on: September 20, 2009, 09:52:43 AM » |
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Ivan, We too had to fire the boiler for about an hour (one shot button on the Dataterm) on the 17th September as we had three days of dense cloud cover! This was only the second time since the end of March (other time was beginning of July!) Since then we have had the cylinder reading 63C and even yesterday the cylinder reached 56C (weather was warm but watery sunshine) Still not complaining, luv this solar hot water me! (frotterism!)  Just got reduce my baseload of electricity struggling to get below 456 kW/h a month!  |
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« Last Edit: September 20, 2009, 05:59:23 PM by Flamethrower_ »
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rob26440
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« Reply #3 on: September 20, 2009, 10:18:37 AM » |
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S/E England. 30x58mm tubes, S/W facing 40deg pitched roof, 216L primary and 184L secondary cylinders, TDC3 with home-made, separate controller to switch between cylinders, 15mm tubing with min 25mm insulation.
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Flamethrower_
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« Reply #4 on: September 20, 2009, 10:40:18 AM » |
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Whoops typo  |
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Justme
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« Reply #5 on: September 20, 2009, 10:58:55 AM » |
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Still looks like a heck of a lot.
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Navitron solar thermal system
30 x 58mm panel 259L TS
1200watts solar 120vdc
FX80 Solar controller
Victron 12v 3000w 120a
200w (250w peak) 12v turbine as a tester
6kva genny
6 x 2v cells 1550amp/h 5C
24 x 2v cells 700amp/h 5C
Total bank 4350 amp/h @12v
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sleepybubble
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« Reply #6 on: September 20, 2009, 11:11:44 AM » |
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Looks like a monthly amount to me.... on my tariff of 9.5p per Kw/h that would be about £43.... you sure its not 4.560 kw/h a day.... which would be a fair average for a month.
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;-)
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rob26440
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« Reply #7 on: September 20, 2009, 12:22:03 PM » |
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you sure its not 4.560 kw/h a day 4.560 kWh/hr a day = 4.560 x 24 = 109.44 kWh/day! On a full year I'm averaging 16kWh per day. Was 19 to 20kWh/day up to 2yrs ago. Just switched to EDF and the rate for electricity is 9.11p/kWh (inc VAT). Gas is 3.945p/kWh inc VAT. Back to the topic. Had a good run from June to end Aug with virtually no gas usage. But now Sept is here we are using about 0.1 BTU/day (just over 3kWh)of gas to top up the hot water. Not bad solar gain so far for the month. (3.5 adults with 1 v. heavy user of hot water. A shower isn't a shower unless it lasts for 12 to 14mins at 7 to 8L/min!) |
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S/E England. 30x58mm tubes, S/W facing 40deg pitched roof, 216L primary and 184L secondary cylinders, TDC3 with home-made, separate controller to switch between cylinders, 15mm tubing with min 25mm insulation.
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Flamethrower_
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« Reply #8 on: September 20, 2009, 05:46:48 PM » |
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Typos are not an excuse!  It would be useful to give you guys the correct information, I am trying! 456 kWh per month which I still think is high the teenager left last month (well 24 years old actually but still consumed like one wait till he has to pay the bills!) hopefully watch the rating on http://www.imeasure.org.uk/ rapidly improve. 210litre Cylinder at 56C at 17.45 good for another mix of cloud/sunny day just solar no gas boiler! |
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« Last Edit: September 20, 2009, 07:22:36 PM by Flamethrower_ »
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EccentricAnomaly
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« Reply #9 on: September 20, 2009, 07:13:15 PM » |
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456 kW/h per month
kWh Flipping Flowery Sunhats |
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desperate
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« Reply #10 on: September 20, 2009, 07:22:59 PM » |
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Calm down EA, your getting like that pesky paper clip thingy  Desp |
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rob26440
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« Reply #11 on: September 20, 2009, 07:47:32 PM » |
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the teenager left last month (well 24 years old actually but still consumed like one) My "teenager" is 33 years old and he is still at home - with no immediate (well - any) prospects of him going! Either he goes or I have to add another 20 tubes to generate enough hot water to meet his, & his girlfriend's, ablutionary requisites. However, this September is looking promising. 2/3rds of the month gone and I'm already at 87% of September 2008's solar kWh - but only 70% of Sept 2007 (which I think was a bumper month for sun). |
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S/E England. 30x58mm tubes, S/W facing 40deg pitched roof, 216L primary and 184L secondary cylinders, TDC3 with home-made, separate controller to switch between cylinders, 15mm tubing with min 25mm insulation.
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sleepybubble
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« Reply #12 on: September 20, 2009, 07:56:32 PM » |
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456 kW/h per month
kWh Flipping Flowery Sunhats hey its a tricky one for slyxidecsics, we all know what was meant. Personally I followed the error through from earlier posts on the thread. If you weren't such a pedent you wouldn't be banging your head on the wall  |
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;-)
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Ivan
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« Reply #13 on: September 20, 2009, 10:59:54 PM » |
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Apart from the two days, we're still exclusively solar since 8th March. Today the cylinder hit 64C from top to bottom. It would have gone higher, but it was cut short by three loads of washing and the dishwasher (Got the clothes washed in time for solar-drying on the line. Incidentally, I've noticed I need several hours of September sunshine to get the clothes dry, even though it was nice and warm, whereas back in June/July if we got a sunny day, clothes were line-dried in only a few hours).
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Ivan
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« Reply #14 on: September 23, 2009, 11:57:41 PM » |
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Today was the third day since 8th March that we needed the boiler. Only to top up the tank, which was around 40C after we'd finished running kids' baths in the evening.
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