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Re: Dan's 20 foot turbine (Sweden)

4 hours 48 min ago
Thank you Electrondaddy!

Makes sense whith airgap incl. stator thickness 

Have a good day in Canada!

Kind regards from a rainy Sweden

/Daniel

Re: Dan's 20 foot turbine (Sweden)

5 hours 8 min ago
on this site the air gap refers to the space between the rotors. that is to say the thickness of the stator plus the clearances between the stator  and the mag rotors

Re: Dan's 20 foot turbine (Sweden)

7 hours 19 min ago
Hello,

Please help me to verify what this "Airgap" in the calc. sheet refers to. Is it smallest gap between magnets mounted on disc or total airgap (two sides of stator) between magnets and stator or something else? I posted a picture of what I believe...

Re: Insulation & moisture control questions?

10 hours 50 min ago
1) Not all dehumdifiers have a humidity stat; mine doesn't.

2) Yes, the sort of dehumidifier you describe (and that I have) does act as a heat pump, though I believe that the CoP is likely to be less than 2.

Rgds

Damon

Re: Insulation & moisture control questions?

Sun, 02/07/2016 - 17:32
So my experience with a dehumidifier in my shed is that it seems the latent heat of condensation you get for free, free as in the coefficient of production of the dehumidifier, which should be at least 2. What i'm saying is it seemed to me that the deh...

Re: Insulation & moisture control questions?

Sun, 02/07/2016 - 17:25
They'll help maintain a humidity level of around  50% approx - they won't constantly be trying to lower the humidity.

"Preserves the indoor moisture" might be a rather odd way of saying a similar thing.

Re: Floating Hydro Generator or ??

Sun, 02/07/2016 - 15:34

 I have a slightly similar plan with a floating water wheel set up. I took 2 motorcycle front wheels and cut slots in the bead areas and inserted lengthwise split 14" long 4" PVC pipe with end caps. I have 2 gold dredge pontoons that I will mount the ...

Re: Floating Hydro Generator or ??

Sun, 02/07/2016 - 15:06
Quote from: skid on February 07, 2016, 12:06:59 PMI'm just up the coast from you. I happen to know for a fact that last summer lasted 8 days  

Seriously, if your stream is prone to such large changes in water flow, which it...

Re: Insulation & moisture control questions?

Sun, 02/07/2016 - 14:48
Quote from: sean_ork on February 05, 2016, 02:57:26 PMQuote from: PNW_Steve on February 05, 2016, 09:51:02 AMWell I have been reading up on the MHRV and if I understand correctly it "preserves the ind...

Re: Floating Hydro Generator or ??

Sun, 02/07/2016 - 13:06
I'm just up the coast from you. I happen to know for a fact that last summer lasted 8 days  

Seriously, if your stream is prone to such large changes in water flow, which it will be in the PNW, it will be bringing down all types of debris during hig...

Re: Dan's 20 foot turbine (Sweden)

Sun, 02/07/2016 - 04:17
paara, thank´s!

that makes sense and now the output values correspond better with actual stator and disc diam.

One other thing I would like to have a piece of advice on is the number of strands. In star connected coils the calc. sheet allow 18,42mm co...

Re: Dan's 20 foot turbine (Sweden)

Sun, 02/07/2016 - 03:14
I thought all measurements about the coil was regarding the "coil hole". The outer measurements is calculated by adding the coil width.?  If not the results become wrong compated to my my model drawings

Re: Adding "ground source" to an exixting heat pump?

Sat, 02/06/2016 - 10:58
Good idea!

I am fairly certain that the stream has sufficient flow to accomplish this in the Winter. I am not so sure about the flow in the summer.

I was out looking things over yesterday with this application in mind. I picked a spot where I can plac...

Re: Floating Hydro Generator or ??

Sat, 02/06/2016 - 10:29
Quote from: skid on February 05, 2016, 06:36:47 PMSolar panels in the summer when flows are low, and a water wheel in the winter when the rains come...

 

Good thought... Last year Summer fell on a Saturday and we h...

Re: Dan's 20 foot turbine (Sweden)

Sat, 02/06/2016 - 03:50
Hi klsmurf,

Thank´s! That #4 makes sense and since I have a tapered inner coil space I guess largest inner width is asked for.

Regarding the airgap I see further down in the calc sheet that there is a separate input cell for the airgap between magnet a...

Re: Floating Hydro Generator or ??

Fri, 02/05/2016 - 19:36
Solar panels in the summer when flows are low, and a water wheel in the winter when the rains come...

Re: Dan's 20 foot turbine (Sweden)

Fri, 02/05/2016 - 17:53
Hi,   A couple things:

I believe that #4, they are asking for the width of the inner hole.
The airgap is the distance between the faces of the magnets on the opposing rotors

Re: Insulation & moisture control questions?

Fri, 02/05/2016 - 15:57
Quote from: PNW_Steve on February 05, 2016, 09:51:02 AMWell I have been reading up on the MHRV and if I understand correctly it "preserves the indoor moisture".

I don't quite get that as when you remove the heat from the inte...

Re: Dan's 20 foot turbine (Sweden)

Fri, 02/05/2016 - 15:36
Rest of the data. Please comment if you see something that doesn´t look correct. What bothers me is that my actual stator and magnet disc diameter is not even close to the figures that the calculator suggests.
 /Daniel