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Thanks Ann & Digi-Key.

Iron

mixed of geothermal, solar, wind energy

What an average life expectancy for geothermal alternative is?

Heat pump - house heating units, AC, defrosters

ah, yes, archives are wonderful.

 

Iron

got up late... here it's just 06:42 next day. listened in on the archived material and read all the msgs. nice presentation... i'll try to be here at 4:00am 2moro... many thx from sydney, australia. oh, belated happy new year by the way...

Iron

Thank you Jon I appreciated it.

Iron

OK -- Thanks - Hope to see you here tomorrow -- Jon

 

 

Iron

If anyone's question was missed, please chime in now and I will anwer if I can. Thanks --

Iron

?Have this type of geothermal energy been used in residential area?


Yes, ground source heat pumps are commonly used in residential areas. I have a company less that 20 miles away who manufactures and installs. Many big companies like Johnson controls, honeywell, ge, etc who make controls and components. It's not rocket science, but you do want safety engineered in.

 

Iron

? Do ground coupled systems scale up easily, or is there a limit to the size of such a system where cost per capacity begins to rise?

 

There can be a point where the energy needed to pipe fluids for such long runs get price prohibitiive.

Also, the longer runs can be reliability issues since the odds that a puncture will occur increases with more length. But, overall, it scales well. One approach it to use parallel runs of tubing with check valves so if one fails, it doesn't take the others with it.

 

 

Iron

I'm refering to ground coupled heat pumps.

Gold

Have this type of geothermal energy been used in residential area?

Iron

? Do ground coupled systems scale up easily, or is there a limit to the size of such a system where cost per capacity begins to rise?

Gold

Thank you very much Jon.

Iron

Question 4 answers -- Very good, many creative ideas for co generation.


Heat can be extracted before or after turbine generator stage to heat water of air. Even mechanical energy from turbine could drive circulating fans. Thermo electric (Peltiere effect devices), can extract electricity directly from wasted heat. I wouldn't suggest cooking a steak on the generator though.....

 

 

Iron

Answer to question 3 -- What other energy systems can be used with geothermal to assure constant operation -- You can use a battery based wind or solar array to provide backup energy for geothermal when utility power is out, or, just by itself for a true off grid solution. Note - Biodiesel generator is also pretty cool if you have the means of extracting vegetable oil.

Iron

Thanks Jon.  This set of classes has been awesome.

Iron

Lightining is moving in so If I loose power, I will address all qustions after it passes.

 

Iron

Answer to question 2 -- Operating costs are lower with geothermal because you don't need fuel in addition to electricity to drive them. The Earth is the source of fuel, and electricity just drives the system of extraction.

Iron

Where can I download the videos for this week?

Iron

Thanks, in areas of hard water is the useful life compromised to the extent that there is limieted or no payback?

 

 

Iron

Answer to question 1 -- Very good.  dehumidifiers, freezers, air conditioners, some heating/cooling systems, etc

Iron

?? What are your thoughts on energy monitoring tools?  Seems like they would be a foundation for evaluating the efficiency of any form of alternative energy that consumes electricity. Thanks for an informative session Jon.


Thank you -- Energy monitoring tools would be a great idea if they could become standardized. Even efficiency calculations vary. For fuel based systems, the intrinsic energy in the fuels would have to be normalized against costs to make it an apple to apple comparison. Since fuel costs change, this would have to be alive caluclating spreadsheet type of tool.  This would be a good thesis project.

 

Iron

Jon's question was: What common appliances do we use that have heat pumps?


Ans: Dehumidifier?

Hi, i am not really clear about how the loop is fisically done underground, area we talking about drilling horizontally or just drilling two vertical wells at a drifferent depth+

 

?? Are ground loop systems constructed using PEX tubing? Not as thermally conductive as copper, but no corrosion problems...

I don't think so but if anyone is using them, please let us know. I have used PEX for solar hot water systems, but not geothermal. It could be used but you would need longer runs to offset the lower thermal conduction so cost would be higher.

Iron

?? What are your thoughts on energy monitoring tools?  Seems like they would be a foundation for evaluating the efficiency of any form of alternative energy that consumes electricity. Thanks for an informative session Jon.

Iron

? Is there a difference in life expectancy of a ground coupled system between the horizontal and vertical wells?

 

Not that I know of. It depends on factors like how acidic is your soil and what materials the piping is made from. Passivated coatings can help but add cost.

Iron

Thank you very much!  Ann L.

Iron

?? Can you reference me to any geothermal electronic controllers manufacturer ?

Iron

?? Are ground loop systems constructed using PEX tubing? Not as thermally conductive as copper, but no corrosion problems...

In Canada a Site called. Drakes Landing did a group of house. With the heat pump systems

Iron

Thanks Jon and Ann for the interessting session, can't linger so have to earn my keep. See all tomorrow.

Iron

? Is there a difference in life expectancy of a ground coupled system between the horizontal and vertical wells?

Gold

I considered a Geothermal HVAC system for my house a few years back.  Cost vs payback just didn't seem to be there.  In Arkansas anyway.

Thank you for the great presentation!

Iron

??A retired co-worker has a geothermal heat pump system for his house.  I wonder what he uses for pipes being we are right on the gulf.  (i'd ask but he's visiting his son in colorado.)

 

I think this comment page will be active after the week is done so you can alwys post comments and learned info for us... Thanks --

Iron

??I wonder how long the return of investment is for each of the harvesting systems that we have studied this week  ?

 

That would be a good subject for a study grant.

Iron

A retired co-worker has a geothermal heat pump system for his house.  I wonder what he uses for pipes being we are right on the gulf.  (i'd ask but he's visiting his son in colorado.)

Iron

I wonder how long the return of investment is for each of the harvesting systems that we have studied this week  ?

Iron

??In average, how deep a well one needs to drill?  Thanks, Ann L.

It varies with location. A hot well will be thousands of feet deep unless you are lucky enough to be in a thermally conducted area like a hot spring. Water based systems can vary to under 100 feet to several hundreds of feet depending on when you hit water. Believe it or not, people still use dowsing. 

 

Iron

Thank you both!Very good info!

 

Iron

Thanks, Jon. The references are very useful.

Very, very interesting and illustrative topics

Thank you all,

Iron

Thank you very interesting

Iron

Thank you Jon and Ann

Iron

Co-gen: another low temperature stage could be installed. Check out Chena Hot Springs system. Also, the reinjection loop could have some more heat extracted for low temp uses, such as building heat.

Thank you for today's presentation Jon

 

Iron

Thank you very much, Jon.

Iron

The generator can be used to charge a battery bank of an inverter

Iron

In average, how deep a well one needs to drill?  Thanks, Ann L.

Iron

Use hot water after electricity generation for heating.

 

Iron

Heating and power generation

Iron

Jon's question was: How can cogeneration be used here?

Blogger

I wonder how can I further investgate if geothermal is ok here in Chihuahua

Iron

I had issues with explorer but ok with chrome

Iron

No energy is used for cooling, the energy used is to circulate the fluids

Iron

Because, not a lot Mechanical and Electrical equipment and parts are used

Iron

Less energy is required to increase or decrease the tempurature.

Iron

Jon's question was: Why are operating costs so low?

Blogger

There is a specific amount of heat in BTU/square feet that flows from the earth, but I can't remember what the actual value is..

Slide 12 is a good idea, but not for west TX, there isn't any water.....

Iron

Always wanted to do a ground source heat pump in my back yard.

 

Iron

@Jon, Question, how dip should be horizontal heat thermall for house application?

Iron

slide 9 sounds like a good idea and aquifer protection is a concern. it can't be contaminated by the injection well.

Iron

Stand alone ice makers, HVAC, refrigerator

 

Iron

Refrigerators, heat pump HVAC  Air Conditioners

Iron

Jon's question was: What common appliances do we use that have heat pumps?


Blogger

At start up, the oil entering the Trans Alaskan Pipeline was about 135 degrees. The Sadlerachit formation is around 8000 feet down

@fjgalan Albuquerque, NM.  The one in Spain is Alburquerque.  The one in New Mexico is named for the Duke of Alburquerque but at sometime the R got dropped.

Iron

Good afternoon from Wisconsin!

 

Iron

Hi, everyone from Bremen, Gr 

Iron

got the slide deck now ... thanks

good afternoon, everyone

Iron

slide deck just runs once for me

Iron

slide deck was OK for me.

Iron

Hi all -Audio is live! If you don't see the audio bar at the top of the screen, please refresh your browser. It may take a couple tries. When you see the audio bar, hit the play button. If you experience audio interruptions and are using IE, try using FF or Chrome as your browser. Many people experience issues with IE. Also, make sure your flash player is updated with the current version. Some companies block live audio streams, so if that is the case for your company, the class will be archived on this page immediately following the class and you can listen then. People don't experience any issues with the audio for the archived version.

Heelo from rainy Toronto, Ontario!!

Iron

hello ... anybody else having trouble getting the slide deck?

Hello from rainy Albuquerque.

Iron

Good morning from Valdez. Just foggy today

Hello from sunny Atlanta

Iron

Hello from Gainesville, Fl

 

Iron

@Zwilrich

Albuquerque NM? or Albuquerque, Badajoz, ESP ? :-)

Iron

Hello from Henderson Nevada

 

Iron

climate change has been kind to us here in Edmonton... so far. Typical winter is -40C or colder and common enough for +40C during summer heatwaves. The temperatures have moderated quite a bit. Plants, insects,  birds and animals are kind of confused by it though.

Iron

hello all from Edmonton, Alberta. Interesting weather for the past few days. single digit lows overnight, predicting 30C this afternoon and close for the next few days.

Iron

Hello from (relatively) cold and rainy Albuquerque.

Iron

Be sure to follow @designnews and @DigiKeyCEC on Twitter for the latest class information. We encourage you to tweet about today's class using the hashtag #CEC.

Blogger

Good evening from the other side of Atlantic, Valladolid, Spain

 

Iron

Hello from Summerville, South Carolina. How's everyone doing?

Iron

Good morning, all. Frank from Webster, NY.

Iron

Please join our Digi-Key Continuing Education Center LinkedIn Group at http://linkd.in/yoNGeY

Blogger

The streaming audio player will appear on this web page when the show starts at 2 PM Eastern time today. Note however that some companies block live audio streams. If when the show starts you don't hear any audio, try refreshing your browser. If that doesn't work, try using Firefox or Google Chrome as your browser. Some users experience audio interruptions with IE. If that doesn't work, the class will be archived immediately following our live taping.

Blogger

Good morning from Mobile, AL

Hello from Romeo Michigan

Iron

G. Morning, day after hump day.

Iron

Be sure to click 'Today's Slide Deck' under Special Educational Materials above right to download the PowerPoint for today's session.

Blogger

Good (just barely) afternoon from Brick, NJ

Iron

Hello from Huntsville, Al

Iron

Good morning from sunny Edmonton

Iron

Morning from Portland Oregon

Iron


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