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Ky-Jeeper

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Reply with quote  #21 
Quote:
Originally Posted by Ky-Jeeper
http://www.upi.com/Odd_News/2014/02/24/Florida-woman-is-told-she-has-one-month-to-plug-in-to-the-grid/7991393263020/

There is another case similar to this. I expect to see more of this.



JoeK

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Reply with quote  #22 

The article from the OP just flies right over a huge flaw in this idea. The heat pump water heaters, as noted, simply draws heat from the room to heat the water. Heat that I would have to provide in addition to the electrical power to run the pump. IF I lived in a warm climate, then the heat pump could be a bonus as an AC, but not in my cold climate. Actually it seems particularly inefficient if you have a cold climate. Out of the question really in my climate. When its 20*below and the wind is howling the last thing I want my water heater doing is cooling my house!

Start talking about cavitation (hydrosonic) water heating and you might be making a realistic bid for PV based water heating even in cold climates, otherwise I think whomever posted the efficiency ratios summed it up nicely. Though quality PV panels nowadays are more like 17-18%, a good flat plate thermal collector will reach 70% efficiency, under certain conditions of course.

What is cavitation/hydrosonic water heating? its the real "wave" of the future [wink]

 Griggs has done a lot of interesting research and development.



p.s. this technology is commercially available, but only on industrial/commercial scale equipment.

mattie

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Reply with quote  #23 
Ky jeeper,on battle for california desert clip,that public comment does not require a response what a bloody joke.Someone should make him rip his own house down and stand mute when he asks why.
Garage_Hermit

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Reply with quote  #24 
phew, that Antilope Valley vid is chilling stuff...

spread the news...

G_H

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Ky-Jeeper

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Reply with quote  #25 
Wonder how many here has been cited by their local government because of their own alt. energy projects. Heck clothes lines is banned in many places.
solardan1959

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Reply with quote  #26 
Since I started this thread I going to jump an and try and steer it back in the direction I intended.  While I strongly object to most Government intrusions into out homes, health, cars, travel, and on and on, this thread was to get conversations going about PV versus solar.  While someday I'd love to have a 5K array or better hanging on the house I doubt that I would uses it power the electric water heater.  I sure won't be replacing my slolar hot air panels with an electric heater!
Dan
Evilroyslade

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Reply with quote  #27 
         I was surprised to see your article proposing solar solutions that cost $5,000 or more. After reading the pros and cons I feel better informed about the different options when you can afford them. Thanks for starting the discussion.

         
This forum for DIY ideas of heating water and spaces attracted me because I want to build and maintain my own systems for $500 or less. I hope to build both systems well enough that they last 5-10 years. 

        Now I consider store bought PV and hot water systems ROI too expensive to offset my average $120.00 monthly utility bill. But 28 years ago when my heating bills were going up every 2 years I realized that I had to reduce the amount of gas and electric I use. I payed $5,395 for a roof mounted solar heat collector which included winterizing the whole house with additional insulation and sealing all the air leaks and a new variable furnace thermostat.  It's almost 30 years later and when it's in the 20'sF with just a little sun light the solar collector kicks on.  I had to replace the solar fan (350CFM) 1 time in 30 years.
 
    This summer I plan to build a solar heat collector (Screens) to heat my basement. Next year I will build a Solar hot water system to supplement my existing gas hot water heater and maybe store some hot water to supplement my gas furnace during the nights. 

Regards.  Clyde
 
  

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mattie

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Reply with quote  #28 
What kind of feed in tarrifs are available in each country,the use of the grid instead of battery banks  has its merits too.In Ireland its as far as i remember 19 c per kWh dropping to 9c per kWh after 5 years(have to recheck this may have changed).You will have to fork out for a grid tied G83 approved inverter which will cost over 1000 euro.So not as good on cost as using DIY solar thermal.
Regards Mattie
solardan1959

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Reply with quote  #29 
EvilRoy,
   Did you ever get a chance to see the "inner workings" of you hot air collector?  I'm always curious to see how the manufacturers built and designed theirs.  It takes a lot more time to pay off that manufactured unit but for a lot it does build in some type of security.  I feel I have gotten my money back in a year or two but that's very little compared to the experience points.  I will always have some type of heater attached to the house from now on.

Dan
Evilroyslade

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Reply with quote  #30 
Dan,

           I will have a look inside my manufactured solar panel this summer when I get up on my roof. It's been working fine for 28 years and I've never ever looked inside it, the fan I replaced 3 years ago was in the attic. Now that I'm studying up on DIY solar panels I'm more than curious about mine.

Regards. C lyde

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