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Search: Posts Made By: SDMCF
Forum: Solar Heating 03-15-22, 12:56 PM
Replies: 8
Views: 2,145
Posted By SDMCF
The solar-powered pump might struggle to raise...

The solar-powered pump might struggle to raise the water to a high roof roof for a drainback system. I don't know if a sealed & presurised system might be easier or harder for the pump.

For my...
Forum: Solar Power 11-08-21, 12:30 AM
Replies: 9
Views: 1,673
Posted By SDMCF
https://www.masterelectronics.com/en/nte-electroni...

https://www.masterelectronics.com/en/nte-electronics/mlr335k250-12008307.html?utm_term=MLR335K250&ref=oemstrade&utm_campaign=oemstrade&utm_medium=inventoryrefferal&utm_source=oemstrade ??
Forum: The Billiards Room 11-07-21, 02:12 AM
Replies: 3
Views: 3,113
Posted By SDMCF
I am intrigued by the concept. I have worked on a...

I am intrigued by the concept. I have worked on a couple of game developments and have also done software development for a power company. My spouse is a Dr of Science who has worked in power...
Forum: Solar Heating 09-29-21, 12:09 AM
Replies: 8
Views: 2,145
Posted By SDMCF
I use a Resol Deltsol BS Pro. The plus points are...

I use a Resol Deltsol BS Pro. The plus points are that it is easy to use, it has setups to suit a number of equipment configurations, and it has proven reliable. I have been happy with it. The...
Forum: Solar Heating 09-13-21, 12:15 AM
Replies: 4
Views: 1,795
Posted By SDMCF
I was not aware of that. I have had no problems...

I was not aware of that. I have had no problems with mine, which have been in use for about 14 years, so maybe the style we have here is not the same as you have over there.
Forum: Solar Heating 09-06-21, 12:03 AM
Replies: 4
Views: 1,795
Posted By SDMCF
I don't know about thread specs so I don't know...

I don't know about thread specs so I don't know if the threads we have are NPT or not, but 1/8" sounds small to me. My system uses 22mm copper pipe and my automatic air vent is 3/8" (unknown thread...
Forum: Solar Power 08-05-21, 09:09 AM
Replies: 13
Views: 6,952
Posted By SDMCF
That sounds a good approach, if the mirrors could...

That sounds a good approach, if the mirrors could be mounted safely and firmly so they were not converted into a kite in the first high wind. Not impossible by any means, it would just need a bit of...
Forum: Solar Power 08-04-21, 08:27 AM
Replies: 13
Views: 6,952
Posted By SDMCF
At my lattitude the winter sun is barely over the...

At my lattitude the winter sun is barely over the southern horizon. To be at 90 degrees to the incoming sunlight my panels are mounted almost vertical on my south-facing wall. The ground slopes away...
Forum: Solar Heating 01-10-21, 02:15 AM
Replies: 14
Views: 5,264
Posted By SDMCF
Does your controller always run the pump at full...

Does your controller always run the pump at full speed? Or does it keep pumping but modify the pump speed based on the delta? Is it capable of changing the pump speed?
Forum: Solar Power 01-03-21, 03:17 AM
Replies: 13
Views: 6,952
Posted By SDMCF
My evacuated tubes are mounted almost vertically...

My evacuated tubes are mounted almost vertically on the south-facing wall of my home. At our lattitude the winter sun is low on the horizon. The ground slopes away from the house towards the south...
Forum: Solar Heating 09-22-20, 02:25 AM
Replies: 16
Views: 6,296
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, 01:39 AM
Replies: 16
Views: 6,296
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, 03:50 PM
Replies: 16
Views: 6,296
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, 12:18 AM
Replies: 38
Views: 22,140
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, 01:25 AM
Replies: 23
Views: 15,372
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, 03:24 AM
Replies: 13
Views: 6,558
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, 04:31 AM
Replies: 2
Views: 3,650
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 08-28-16, 11:27 PM
Replies: 6
Views: 4,556
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, 02:00 AM
Replies: 8
Views: 4,393
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, 03:08 PM
Replies: 17
Views: 8,193
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, 01:50 AM
Replies: 1,943
Views: 2,017,845
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, 12:27 AM
Replies: 1,943
Views: 2,017,845
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, 12:35 AM
Replies: 1,943
Views: 2,017,845
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, 12:29 AM
Replies: 1,943
Views: 2,017,845
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, 12:45 AM
Replies: 20
Views: 9,674
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...
Showing results 1 to 25 of 125

 
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