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Search: Posts Made By: SDMCF
Forum: Solar Heating 09-22-20, 03:25 AM
Replies: 9
Views: 739
Posted By SDMCF
Jeff, how do you see such problems happening? I...

Jeff, how do you see such problems happening? I have no experience with drainback systems so I can only guess.

It seems to me there are 2 ways: a failure to pump fluid into the collectors because...
Forum: Solar Heating 09-17-20, 02:39 AM
Replies: 9
Views: 739
Posted By SDMCF
I assume you mean horizontal - or actually a...

I assume you mean horizontal - or actually a little off horizontal to facilitate drainback. If the manifolds were vertical the tubes would be horizontal and I don't think they would work in that...
Forum: Solar Heating 09-14-20, 04:50 PM
Replies: 9
Views: 739
Posted By SDMCF
I have 90 tubes and they perform very well on...

I have 90 tubes and they perform very well on cold days but do not perform at all well on overcast days. The most productive time of year for me is February/March when the temperature can be -30C but...
Forum: Solar Heating 03-03-20, 01:18 AM
Replies: 38
Views: 5,984
Posted By SDMCF
Can you write more about why that layout is a...

Can you write more about why that layout is a good one? Are you primarily aiming to achieve good/best heat transfer?
I have a similar project planned for the summer, but so far my tank layout ideas...
Forum: The Billiards Room 02-11-20, 02:25 AM
Replies: 23
Views: 7,694
Posted By SDMCF
I think the logistics of obtaining a supply of...

I think the logistics of obtaining a supply of fox urine would defeat me.
Forum: Geothermal & Heat Pumps 12-20-19, 04:24 AM
Replies: 13
Views: 2,697
Posted By SDMCF
I have some difficulty visualizing this so maybe...

I have some difficulty visualizing this so maybe I am not correctly understanding your design. Can you really coil 1/4 copper tubing within a 1" pipe? How much water would then be inside the 1" pipe...
Forum: Geothermal & Heat Pumps 05-24-19, 05:31 AM
Replies: 2
Views: 1,731
Posted By SDMCF
I had a similar idea for keeping our front steps...

I had a similar idea for keeping our front steps free from ice. This is a much smaller area than you are planning but even so I could not make it work. My idea was to pump water heated by our solar...
Forum: Solar Heating 08-29-16, 12:27 AM
Replies: 6
Views: 2,637
Posted By SDMCF
Some good advice from stevehull, but there is one...

Some good advice from stevehull, but there is one thing I would question. He says:



Maybe the cloud cover here is different from Steve's, but I don't find that. I have 100 evacuated tubes and...
Forum: Conservation 08-01-16, 03:00 AM
Replies: 8
Views: 2,848
Posted By SDMCF
Depends on your local tariffs I guess. For me the...

Depends on your local tariffs I guess. For me the cost varies hour-by-hour with no pre-set low rate and peak rate. The highest peak I have seen is almost 100 times the lowest rate, but that is...
Forum: Other Improvements 03-09-16, 04:08 PM
Replies: 17
Views: 4,929
Posted By SDMCF
You are correct that the CFM of the fans is...

You are correct that the CFM of the fans is important information but unfortunately I see no easy way to determine that. Any ideas?

My test room had an area of about 25 sq m (270 sq ft).

You...
Forum: Geothermal & Heat Pumps 02-25-16, 02:50 AM
Replies: 1,942
Views: 1,597,494
Posted By SDMCF
That's interesting information. FWIW The...

That's interesting information. FWIW The refrigerant in my system is R407C. I have no idea whether that is in any way better or worse.

I may have given the wrong idea when I said that my system...
Forum: Geothermal & Heat Pumps 02-23-16, 01:27 AM
Replies: 1,942
Views: 1,597,494
Posted By SDMCF
I nearly spat out my coffee! That did make me...

I nearly spat out my coffee! That did make me laugh.
You may be correct that more modern technology is normal here compared to North America, but if you saw my house you would understand why that...
Forum: Geothermal & Heat Pumps 02-22-16, 01:35 AM
Replies: 1,942
Views: 1,597,494
Posted By SDMCF
Is that normal in your area? It seems very deep...

Is that normal in your area? It seems very deep to me. Folks in my area seem to think it is counter-productive to go too deep. I believe the thinking is that the ground temperature lower down won't...
Forum: Geothermal & Heat Pumps 02-22-16, 01:29 AM
Replies: 1,942
Views: 1,597,494
Posted By SDMCF
and That's a reasonable rule of thumb but as...

and

That's a reasonable rule of thumb but as always "it depends". I just installed a GSHP and connected it into my existing heating system (radiators). I didn't change anything inside the house...
Forum: Geothermal & Heat Pumps 02-17-16, 01:45 AM
Replies: 20
Views: 5,478
Posted By SDMCF
Are you considering an air source or ground...

Are you considering an air source or ground source heat pump?

I have a NIBE GSHP. The pipe coming into the house from the underground loop passes along the outside of a basement cool room / cold...
Forum: Lawn and Garden 02-15-16, 05:35 PM
Replies: 858
Views: 163,666
Posted By SDMCF
Yes. In most solar applications it is important...

Yes.
In most solar applications it is important to consider the consequence of stagnation if the pump fails on a hot day, and PEX might conceivably have problems there. I don't think that is...
Forum: Lawn and Garden 02-15-16, 12:42 AM
Replies: 858
Views: 163,666
Posted By SDMCF
I have been experimenting with moving hot air...

I have been experimenting with moving hot air (http://ecorenovator.org/forum/other-improvements/4699-vertical-hot-air-tube.html) from ceiling down into a room. I found it is better to have the fan at...
Forum: Lawn and Garden 02-12-16, 01:24 AM
Replies: 858
Views: 163,666
Posted By SDMCF
Should work well and I'm not convinced that the...

Should work well and I'm not convinced that the fan will be needed.

Will you mount the rad horizontally or vertically? I suggest you mount it almost horizontally - but with enough slope that you...
Forum: Other Improvements 02-11-16, 01:05 AM
Replies: 17
Views: 4,929
Posted By SDMCF
MEMPHIS91, That looks really good, and a whole...

MEMPHIS91, That looks really good, and a whole lot better than the temporary lash-up I used for my test. I look forward to your longer term impressions.

Would a thermal shot from further away,...
Forum: Other Improvements 02-10-16, 08:56 AM
Replies: 17
Views: 4,929
Posted By SDMCF
Yes, do let us know the results! I have just...

Yes, do let us know the results!

I have just had another thought about my results. What I am trying to do is to reduce (ideally eliminate) the temperature difference between floor and ceiling, so...
Forum: Other Improvements 02-10-16, 06:20 AM
Replies: 17
Views: 4,929
Posted By SDMCF
@MEMPHIS91: You are right, this arrangement...

@MEMPHIS91: You are right, this arrangement probably doesn't move a great deal of air although I have no way of measuring how much air it does move. A ceiling fan should move a lot more. The...
Forum: Other Improvements 02-09-16, 04:29 AM
Replies: 17
Views: 4,929
Posted By SDMCF
Vertical hot air tube

We all know that the air near the ceiling in a room is warmer than the air near the floor and that blowing the warmer air downwards should make the room feel warmer at "people level". That could be...
Forum: Geothermal & Heat Pumps 01-21-16, 03:55 AM
Replies: 1,942
Views: 1,597,494
Posted By SDMCF
That heating and cooling degree days link is...

That heating and cooling degree days link is really useful. What base temperatures are typically used with that data? (For both heating and cooling).
Forum: Solar Heating 01-16-16, 02:31 PM
Replies: 17
Views: 7,767
Posted By SDMCF
I hope (and believe) you are right pletby. I have...

I hope (and believe) you are right pletby. I have drained the system completely and re-filled using fresh anti-freeze. All seems OK.

This has got me thinking though. What about the anti-freeze in...
Forum: Solar Heating 01-11-16, 02:22 PM
Replies: 17
Views: 7,767
Posted By SDMCF
I have never replaced the anti-freeze as such. On...

I have never replaced the anti-freeze as such. On occasion I have changed the plumbing around a bit and have topped it up then, but I have no good measure of its strength. All a bit disorganized...
Showing results 1 to 25 of 115

 
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