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Search: Posts Made By: SDMCF
Forum: Solar Heating 08-28-16, 11:27 PM
Replies: 6
Views: 1,721
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: 1,864
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: Geothermal & Heat Pumps 02-22-16, 12:29 AM
Replies: 1,940
Views: 1,396,617
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: Other Improvements 02-11-16, 12:05 AM
Replies: 17
Views: 3,494
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, 07:56 AM
Replies: 17
Views: 3,494
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 02-09-16, 03:29 AM
Replies: 17
Views: 3,494
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: Solar Heating 01-11-16, 01:28 AM
Replies: 16
Views: 5,754
Posted By SDMCF
Let me add my 2 cents to this topic, since my...

Let me add my 2 cents to this topic, since my system is similar but different. Similar in that I have both solar and GSHP and I use the solar for both space heating and hot water. Different in that...
Forum: Solar Power 12-04-15, 01:51 AM
Replies: 61
Views: 7,334
Posted By SDMCF
I recently had to use my back-up plan for real...

I recently had to use my back-up plan for real when we had a power outage for 40 hours. My plan failed completely as the oil burner failed to start. The only heat source we had was the wood burner in...
Forum: Appliances & Gadgets 08-25-15, 12:21 AM
Replies: 23
Views: 3,976
Posted By SDMCF
That sounds very like the rationale behind Iron...

That sounds very like the rationale behind Iron (http://www.srware.net/en/software_srware_iron.php) which is the browser I have been using for a while now. Had you considered Iron? If so, why did you...
Forum: Conservation 05-01-15, 08:10 AM
Replies: 35
Views: 6,580
Posted By SDMCF
The little things are so little that I have...

The little things are so little that I have probably forgotten most of them. All I can say is:

Insulation
Changed some bulbs
Insulation
Draught-proofing
Insulation
No longer run a server 24x7...
Forum: Conservation 04-30-15, 06:34 AM
Replies: 35
Views: 6,580
Posted By SDMCF
I can't go back 10 years as I haven't kept the...

I can't go back 10 years as I haven't kept the figures, but I have just been comparing our electricity usage, year-on-year. Giving 2011 (the earliest year for which I have figures) an index of 100...
Forum: Geothermal & Heat Pumps 01-13-15, 10:20 PM
Replies: 18
Views: 2,893
Posted By SDMCF
I have a GSHP and solar thermal but I would not...

I have a GSHP and solar thermal but I would not consider putting solar heat into the ground loop to save electricity in winter. Instead, I use the solar heat to heat my house directly. There is no...
Forum: Solar Power 01-03-15, 05:16 PM
Replies: 61
Views: 7,334
Posted By SDMCF
I considered a pellet burner but decided on a...

I considered a pellet burner but decided on a GSHP. The pellet burner was an attractive option which I eventually rejected because:
a) I wasn't sure how reliable the pellet delivery mechanism would...
Forum: Solar Heating 12-10-14, 11:53 PM
Replies: 53
Views: 9,590
Posted By SDMCF
Yes. I have 4 x 20 tube collectors with twin...

Yes.
I have 4 x 20 tube collectors with twin wall tubes, and 1 x 20 tube collector with single wall, larger diameter, tubes. The larger larger diameter tubes were more expensive. I haven't been able...
Forum: Solar Heating 11-30-14, 01:21 PM
Replies: 53
Views: 9,590
Posted By SDMCF
It seems common to run radiators at 80+C, but I...

It seems common to run radiators at 80+C, but I really don't understand why systems are designed to require that. The temperature at which you run the rads will depend on how well your house is...
Forum: Geothermal & Heat Pumps 10-25-14, 03:00 AM
Replies: 5
Views: 1,402
Posted By SDMCF
If you know how much energy it currently takes to...

If you know how much energy it currently takes to cool your house for 12 hours during the day you could calculate the amount of ice you would need. Distributing that "coolth" may be a bigger problem...
Forum: Geothermal & Heat Pumps 10-21-14, 12:25 AM
Replies: 15
Views: 3,027
Posted By SDMCF
That seems a risky strategy to me. What if you...

That seems a risky strategy to me. What if you have a prolonged power outage? What if you have a pump failure (which is bound to happen when you are away, or can't get a replacement quickly)? To me...
Forum: Geothermal & Heat Pumps 10-02-14, 10:17 PM
Replies: 21
Views: 4,084
Posted By SDMCF
3/4" pex has 0,875" outside diameter Source:...

3/4" pex has 0,875" outside diameter
Source: Properties of PEX tubing (http://www.plumbinghelp.ca/pex_tubing_properties.php)



So exposed area of tank is about the same area as 291' of 3/4"...
Forum: Geothermal & Heat Pumps 10-02-14, 12:52 AM
Replies: 21
Views: 4,084
Posted By SDMCF
I think there is good and bad news. The good...

I think there is good and bad news.

The good news is that your calculation looks way off, and a tote has the same surface area as much longer pex. Can you check your figures?

The bad news is...
Forum: Appliances & Gadgets 10-01-14, 01:09 PM
Replies: 18
Views: 2,956
Posted By SDMCF
I have made a start on the project, so this post...

I have made a start on the project, so this post is a description of what progress I have made so far. Let's start with the hardware.

The guts of the controller is an Arduino. I have bought a mega...
Forum: Geothermal & Heat Pumps 09-26-14, 05:53 AM
Replies: 8
Views: 1,431
Posted By SDMCF
All of that makes sense to me. Our...

All of that makes sense to me.

Our installation uses straight pipes, with the return about 1.5 to 2m from the flow. I can see that straight pipes need a longer trench but that wasn't a major issue...
Forum: Geothermal & Heat Pumps 09-26-14, 01:54 AM
Replies: 8
Views: 1,431
Posted By SDMCF
Interesting document, but it seems to me there...

Interesting document, but it seems to me there are too many negatives to running a field loop around the footings of a structure. This "could have an adverse effect on an earth-coupled basement and...
Forum: Conservation 09-26-14, 12:23 AM
Replies: 25
Views: 6,000
Posted By SDMCF
I don't follow that, but maybe it is...

I don't follow that, but maybe it is climate-dependent. Here, in winter, my attic could be over 50C colder than my house, so putting the water heater there would be crazy.
Forum: Renovations & New Construction 09-01-14, 02:24 AM
Replies: 80
Views: 12,847
Posted By SDMCF
Interesting project. My house was also built...

Interesting project.

My house was also built in the 1890s and also has a crawl space, but the similarity ends there. Your crawl space is a lot more spacious than mine, and it looks like it is more...
Forum: Geothermal & Heat Pumps 08-25-14, 01:53 AM
Replies: 51
Views: 7,038
Posted By SDMCF
I disagree. EU Regulations drive ever closer...

I disagree. EU Regulations drive ever closer technical specifications in order to promote a cross-border electricity market, whilst at the same time forcing government run power systems to be...
Showing results 1 to 25 of 26

 
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