|
O MidKnight
|
 |
« on: April 02, 2008, 08:43:52 PM » |
|
--------------------------------------------------------------------------------
This system only gets the sun after 0930 hours in the summer and 1230 hours in the winter
1200 x 450mm non solar dedicated twin coil cylinder (slightly more capacity and slightly less efficient heat exchange). Panels facing due south and have a total flow and return pipe work of approximately 54 metres in 10mm copper tube. 20 vacuum tubes and some old flat plate panels situated on Salisbury Plain, Wiltshire
27/03
Start of solar gain temperature 27C Sensor 300mm from the bottom of cylinder
1 litres water drawn approx between start of solar gain and end of solar gain
End of solar gain temperature 42C
Sensor 200mm from top of cylinder start 42C finish 61C
30/03
Start of solar gain temperature 24C Sensor 300mm from the bottom of cylinder
0 litres water drawn approx between start of solar gain and end of solar gain
End of solar gain temperature 40C
Sensor 200mm from top of cylinder start 42C finish 62C
1/04 Start of solar gain temperature 24C Sensor 300mm from the bottom of cylinder
1 litres water drawn approx between start of solar gain and end of solar gain
End of solar gain temperature 41C
Sensor 200mm from top of cylinder start 40C finish 64C
Heat dump radiator on north side of building after 15.00 hours
|
|
|
|
« Last Edit: March 06, 2010, 10:03:38 AM by Paulh_Boats »
|
Logged
|
Solar heating - makes you feel good when you open the hot tap and when you look at your heating bill
|
|
|
|
Ivan
Guest
|
|
« Reply #1 on: April 05, 2008, 09:05:51 PM » |
|
5 april 08
my long-run pipe 30 SFC tubes on 260litre cylinder didn't fair well in the overcast conditions today, only reaching 47C.
However, I measured the temperature of the SFA panel in the garden (20tube 140litre) this evening - 69.6C. I don't draw water off this tank very frequently (currently just for biodiesel washes), but it is shaded for much of the day due to trees/house shadow.
Outside temperature at 9pm is 7C. If I remember to check tomorrow morning, we can see what heat loss it experiences over night.
Ivan
|
|
|
|
|
Logged
|
|
|
|
|
Ivan
Guest
|
|
« Reply #2 on: April 06, 2008, 10:59:27 AM » |
|
continued from previous post:
The outside temperature dropped to 4C by 10pm, and remained so until this morning (even had a light covering of snow). Temperature this morning inside the SFA solar panel was 62.4C at 10am (and panel still in shade) and ambient temperature still 4C.
So panel dropped 7.2C over 13hours whilst outdoor temperature was mostly 4C.
ie Rate of temperature drop overnight is 0.55C/hour for a temperature difference of 66C.
|
|
|
|
« Last Edit: April 06, 2008, 11:16:05 AM by Ivan »
|
Logged
|
|
|
|
|
O MidKnight
|
|
« Reply #3 on: April 16, 2008, 08:30:42 AM » |
|
Total flow and return pipe work of approximately 54 metres in 10mm copper tube. 20 vacuum tubes and some old flat plate panels. 1200 x 450mm non solar dedicated twin coil cylinder (slightly more capacity and slightly less efficient heat exchange). Panels facing due panels situated on Salisbury Plain, Wiltshire
15/04
Good sunny day
Start of solar gain temperature 20C Sensor 300mm from the bottom of cylinder
2 litres water drawn approx between start of solar gain and end of solar gain
End of solar gain temperature 42C
Sensor 200mm from top of cylinder start 43C finish 65C
Heat diverted to radiator after 15.00 hours
|
|
|
|
|
Logged
|
Solar heating - makes you feel good when you open the hot tap and when you look at your heating bill
|
|
|
|
Paulh_Boats
|
|
« Reply #4 on: April 16, 2008, 10:48:14 AM » |
|
Its April!
|
|
|
|
|
Logged
|
|
|
|
|
O MidKnight
|
|
« Reply #5 on: April 16, 2008, 07:18:19 PM » |
|
Yes it's April Paul. We are still waiting for you to post a new thread  (The truth is I forgot) Total flow and return pipe work of approximately 54 metres in 10mm copper tube. 20 vacuum tubes and some old flat plate panels. 1200 x 450mm non solar dedicated twin coil cylinder (slightly more capacity and slightly less efficient heat exchange). Panels facing due panels situated on Salisbury Plain, Wiltshire 16/04 Good sunny day Heat diverted to space heating radiator after 14.30 hours approx Sensor 200mm from top of cylinder finish 65C |
|
|
|
« Last Edit: April 16, 2008, 10:14:42 PM by Paulh_Boats »
|
Logged
|
Solar heating - makes you feel good when you open the hot tap and when you look at your heating bill
|
|
|
|
Paulh_Boats
|
|
« Reply #6 on: April 16, 2008, 10:18:06 PM » |
|
Yesterday 15th.
30 tubes SE, 120L with retro coil, evening temps were:
Top of tank 80C
Middle of tank 62C
After one washing machine load in the evening, then two showers in the morning the top temp was down to 50C.
It will be interesting to monitor the bottom tank temperature...I have a theory that a small pump to circulate top to bottom could provide more even heating if switched on above 60C
PS I split off the April postings from the March Temperatures topic into this topic.
|
|
|
|
« Last Edit: April 18, 2008, 11:54:23 PM by Paulh_Boats »
|
Logged
|
|
|
|
|
O MidKnight
|
|
« Reply #7 on: April 17, 2008, 09:06:20 PM » |
|
Magic thanks Ivan and Co
Total flow and return pipe work of approximately 54 metres in 10mm copper tube. 20 vacuum tubes and some old flat plate panels. 1200 x 450mm non solar dedicated twin coil cylinder (slightly more capacity and slightly less efficient heat exchange). Panels facing due panels situated on Salisbury Plain, Wiltshire
17/04
Good sunny day
Heat diverted to space heating radiator after 14.30 hours approx
Sensor 200mm from top of cylinder finish 65C
|
|
|
|
|
Logged
|
Solar heating - makes you feel good when you open the hot tap and when you look at your heating bill
|
|
|
|
Ivan
Guest
|
|
« Reply #8 on: April 17, 2008, 09:30:29 PM » |
|
Nice! Both of you over 60C. My system needs some updating. Replacing the 15mm with 10mm pipe would be the best solution, but no longer possible as burried underneath an attic conversion floor. I might try adding a panel on short piperun at front of house. Might even manage gravity circulation!
|
|
|
|
|
Logged
|
|
|
|
|
NickW
|
|
« Reply #9 on: April 20, 2008, 11:42:41 PM » |
|
I am typically finding that on sunny days the bottom of my 126 litre tank is rising from around 23 - when I leave for work and 40-45 when I get home.Top of tank is piping hot and often boiler doesnt need to kick in in the evening unless allot of water used.
Not seen what the system will do in summer weather as installation went in late Sept.
|
|
|
|
|
Logged
|
Ask Questions, look for evidence, think for yourself
Gold is the currency of Kings, Silver the Currency of Gentlemen. Barter is the Currency of Peasants, whilst DEBT is the currency of SLAVES
|
|
|
|
Ivan
Guest
|
|
« Reply #10 on: April 21, 2008, 01:36:48 AM » |
|
Update on SFA panel (the one with the integral tank).
We've had no significant sunshine for a week or so, and mostly heavily overcast, return to winter-like days. Daytime and night-time temperatures around 7-10C. with a few colder nights.
Measured the temperature of the SFA panel this afternoon - 48C.
|
|
|
|
|
Logged
|
|
|
|
|
O MidKnight
|
|
« Reply #11 on: April 22, 2008, 08:35:34 PM » |
|
Total flow and return pipe work of approximately 54 metres in 10mm copper tube. 20 vacuum tubes and some old flat plate panels. 1200 x 450mm non solar dedicated twin coil cylinder (slightly more capacity and slightly less efficient heat exchange). Panels facing due panels situated on Salisbury Plain, Wiltshire
22/04
Good sunny day
Heat diverted to space heating radiator after 14.30 hours approx
Sensor 200mm from top of cylinder finish 65C
|
|
|
|
|
Logged
|
Solar heating - makes you feel good when you open the hot tap and when you look at your heating bill
|
|
|
|
O MidKnight
|
|
« Reply #12 on: April 23, 2008, 08:08:28 PM » |
|
Total flow and return pipe work of approximately 54 metres in 10mm copper tube. 20 vacuum tubes and some old flat plate panels. 1200 x 450mm non solar dedicated twin coil cylinder (slightly more capacity and slightly less efficient heat exchange). Panels facing due panels situated on Salisbury Plain, Wiltshire
23/04
Good sunny day
10 litres of water used during solar gain period approx. Heat diverted to space heating radiator after 14.30 hours approx
Sensor 200mm from top of cylinder finish 65C
|
|
|
|
|
Logged
|
Solar heating - makes you feel good when you open the hot tap and when you look at your heating bill
|
|
|
|
Paulh_Boats
|
|
« Reply #13 on: April 23, 2008, 08:19:59 PM » |
|
Details below, top of tank 70C at 7pm, middle about 60C
|
|
|
|
|
Logged
|
|
|
|
|
ajstoneservices
Guest
|
|
« Reply #14 on: April 23, 2008, 08:30:28 PM » |
|
We had our best day this year yesterday 250ltr unvented 40 tubes ssw' 30m 10mm 3 showers taken 75c top 74c bottom  Today it rained into the afternoon  3 showers taken 48c top 47c bottom tony |
|
|
|
|
Logged
|
|
|
|
|
