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Search: Posts Made By: NiHaoMike
Forum: Geothermal & Heat Pumps 05-31-15, 04:04 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
Looking the other way, maybe you could consider a...

Looking the other way, maybe you could consider a CHP setup and going off grid? That might make sense if there's a significant service charge for electricity.
Forum: Geothermal & Heat Pumps 12-09-13, 08:39 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
How big is the A/C unit you're planning to...

How big is the A/C unit you're planning to modify? At some point like 1.5x-2x the rating, it gets to the point of diminishing returns. It certainly won't hurt except for making the unit bigger and...
Forum: Geothermal & Heat Pumps 12-09-13, 06:27 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
I recommend a coax heat exchanger like this one: ...

I recommend a coax heat exchanger like this one:
TURBOTEC | COILS, STEAM & WATER | 1.70 TON COAX COIL | Surplus City Liquidators...
Forum: Geothermal & Heat Pumps 12-08-13, 01:50 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
He was thinking about buying a window heat pump,...

He was thinking about buying a window heat pump, which is of no extra value in a heating only geothermal build. Geothermal doesn't need defrosting.

sub $45 Homemade chiller...
Forum: Geothermal & Heat Pumps 12-08-13, 12:29 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
If it's above freezing, you can easily turn a...

If it's above freezing, you can easily turn a window A/C into a heat pump by turning it around.
Forum: Geothermal & Heat Pumps 12-02-13, 03:01 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
Look up some guides on converting a window A/C...

Look up some guides on converting a window A/C into a PC chiller. Not quite as efficient as plumbing in a proper heat exchanger but loads easier.
Forum: Geothermal & Heat Pumps 12-01-13, 11:27 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
This site browses just fine on my "everyday"...

This site browses just fine on my "everyday" D2700 Atom PC. Sounds like your PC is either way outdated or just needs some tuning. (Quick test: Try a Knoppix LiveDVD.)
Forum: Geothermal & Heat Pumps 10-27-10, 10:00 AM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
Maybe a solution is to have it store heat as hot...

Maybe a solution is to have it store heat as hot water to use during defrost. Perhaps even have it work entirely on a hot water loop to simplify the system, although I'm not sure how much efficiency...
Forum: Geothermal & Heat Pumps 10-26-10, 11:02 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
Once defrost is over, the heat pump will then...

Once defrost is over, the heat pump will then have to run a little longer, but it would still be more efficient than using heat strips. You can wire a relay to drop the fan speed to low so the cool...
Forum: Geothermal & Heat Pumps 10-26-10, 12:02 AM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
What about disconnect the heat strips so they do...

What about disconnect the heat strips so they do not operate?
Forum: Geothermal & Heat Pumps 01-04-10, 12:34 AM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
Brazing is not all that difficult. And I don't...

Brazing is not all that difficult. And I don't think any kind of glue will be reliable enough.
Forum: Geothermal & Heat Pumps 01-04-10, 12:29 AM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
I have not built that type of heat exchanger. I...

I have not built that type of heat exchanger. I did build an open coil heat exchanger for my air compressor (so I can inflate tires with cool air) which is just about 5' of 1/4' tubing coiled to...
Forum: Geothermal & Heat Pumps 01-03-10, 05:18 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
It's also possible to use copper tubing in PEX...

It's also possible to use copper tubing in PEX tubing or coils of copper tubing in a piece of PVC pipe. In the case of the PVC pipe, design it to swirl the water for better heat transfer and make at...
Forum: Geothermal & Heat Pumps 12-18-09, 01:56 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
Except for the "HVAC girl" I talked about...

Except for the "HVAC girl" I talked about previously, HVAC engineers tend to be hostile to amateurs. They often claim stuff about safety, but that is a very weak argument since automotive repair is...
Forum: Geothermal & Heat Pumps 10-31-09, 10:29 AM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
I used CO2 when I built my CPU cooler. (I used a...

I used CO2 when I built my CPU cooler. (I used a CO2 tank and regulator originally designed to power air tools with a length of capillary tube to restrict the flow. I was able to borrow it from a...
Forum: Geothermal & Heat Pumps 10-31-09, 12:35 AM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
What about helium? It's truly an inert gas and...

What about helium? It's truly an inert gas and it's easy enough to find. The high thermal conductivity might make it difficult to work but I'm not sure.
Forum: Geothermal & Heat Pumps 10-09-09, 03:44 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
Most window A/Cs use R-22. There is Enviro-Safe...

Most window A/Cs use R-22. There is Enviro-Safe 22a which is a HFC mixture that replaces R-22.
22a Refrigerant Details and Online Ordering at Enviro-Safe, Inc...
Forum: Geothermal & Heat Pumps 09-22-09, 07:33 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
Vacuum on the Cheap - Refrigeration Compressors...

Vacuum on the Cheap - Refrigeration Compressors (http://www.belljar.net/refrig.htm)

So it looks like it is possible to build a good vacuum pump from refrigeration compressors. Just get two and not...
Forum: Geothermal & Heat Pumps 09-18-09, 08:32 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
I actually used an incandescent lamp to warm...

I actually used an incandescent lamp to warm various parts of the plumbing during the second and third vacuum pull. I actually have a sight glass with moisture indicator, which indicated that it was...
Forum: Geothermal & Heat Pumps 09-07-09, 08:26 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
Sam's Laser FAQ - Vacuum Technology for...

Sam's Laser FAQ - Vacuum Technology for Home-Built Gas Lasers (http://repairfaq.org/sam/lasercva.htm#cvacvs5)
I don't have a gauge that can precisely measure the vacuum level, but it pulls as low as...
Forum: Geothermal & Heat Pumps 09-06-09, 10:34 PM
Replies: 1,940
Views: 1,416,859
Posted By NiHaoMike
I'll share my experience with refrigeration...

I'll share my experience with refrigeration relating to a research project I did about refrigerating CPUs for higher performance.

Before doing anything else, research. It is very important if you...
Showing results 1 to 21 of 21

 
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