Forum: Geothermal & Heat Pumps
11-20-16, 02:41 PM
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Replies: 10
Views: 11,831
Wow! A few days away from the computer, and a...
Wow! A few days away from the computer, and a nice little conversation ensued. I don't have a strong opinion about reciprocating versus rotary. I would have to agree with SteveHull about the...
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Forum: Geothermal & Heat Pumps
11-20-16, 02:29 PM
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Replies: 10
Views: 11,831
Went to long on a single post!
The next two are pretty recent. The hyperboloid condenser was neat looking, but it didn't have enough tubing or surface area to effectively dissipate the heat. Saturation temperatures on the high...
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Forum: Geothermal & Heat Pumps
11-13-16, 11:00 AM
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Replies: 10
Views: 11,831
Building a 100 Year Refrigerator
Haven't been on the forum in some time; I have been busy. Began a project in June to construct a modular, long lasting refrigerator. It has gone through many iterations, and there are many more to...
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Forum: Geothermal & Heat Pumps
09-26-15, 12:10 PM
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Replies: 9
Views: 13,594
Thanks Jeff. It is an interesting thread. My...
Thanks Jeff. It is an interesting thread. My little compressor is going to need some special attention when it comes to the oil. I will most certainly consider building a better draining system,...
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Forum: Geothermal & Heat Pumps
09-26-15, 11:46 AM
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Replies: 158
Views: 74,242
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Forum: Geothermal & Heat Pumps
09-26-15, 11:34 AM
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Replies: 158
Views: 74,242
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Forum: Geothermal & Heat Pumps
09-24-15, 08:02 PM
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Replies: 9
Views: 13,594
AC_Hacker, I will probably look into a better...
AC_Hacker, I will probably look into a better speed control. Perhaps, once I build refrigerator, or something like that, I will be more interested in variable speed. I am mainly interested in the...
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Forum: Geothermal & Heat Pumps
09-22-15, 03:24 PM
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Replies: 9
Views: 13,594
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Forum: Geothermal & Heat Pumps
09-21-15, 12:58 PM
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Replies: 9
Views: 13,594
Mini Brushless DC Compressor
A friend of mine recently acquired a small brushless DC compressor for me to work with. He would like to develop some mobile cooling devices for a teardrop trailer he is planning. I was going to...
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Forum: Appliances & Gadgets
09-18-15, 10:47 AM
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Replies: 81
Views: 69,423
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Forum: Appliances & Gadgets
09-17-15, 12:28 PM
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Replies: 81
Views: 69,423
As I understand it, one of the properties which...
As I understand it, one of the properties which made sulfur dioxide such a good refrigerant, was that it acts as an excellent lubricant in the compressor and miscibility problems with the compressor...
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Forum: Geothermal & Heat Pumps
09-17-15, 11:12 AM
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Replies: 21
Views: 15,491
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Forum: Geothermal & Heat Pumps
09-16-15, 08:08 AM
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Replies: 21
Views: 15,491
Has anyone in the Ecorenovator world seen a...
Has anyone in the Ecorenovator world seen a residential HPWH that recovers energy from a home's waste water stream? It always seemed to me, that the time a water heater "calls for heat", is likely...
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Forum: Geothermal & Heat Pumps
09-10-15, 10:08 AM
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Replies: 220
Views: 150,706
Yeah, I wouldn't suppose a HPWH with a 150 watt...
Yeah, I wouldn't suppose a HPWH with a 150 watt compressor, is going to have much capacity for heating. The recovery time is going to be very long. Seems almost absurd to attempt it....almost. I'm...
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Forum: Geothermal & Heat Pumps
09-09-15, 08:20 PM
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Replies: 2
Views: 3,442
I would agree with that assessment, Cassie. As...
I would agree with that assessment, Cassie. As long as these machines are designed to be reversible, they will not be optimized very well for either function. From what I've seen of air to air...
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Forum: Geothermal & Heat Pumps
09-09-15, 03:18 PM
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Replies: 220
Views: 150,706
I have a feeling that this small DC compressor...
I have a feeling that this small DC compressor stuff should spawn a thread of its own. A friend of mine just ordered one of the small Chinese made compressors from eBay. He lacks brazing experience...
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Forum: Geothermal & Heat Pumps
09-07-15, 06:10 PM
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Replies: 220
Views: 150,706
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Forum: Geothermal & Heat Pumps
09-07-15, 12:30 PM
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Replies: 11
Views: 8,453
Hey all! I've been busy in the shop; no time to...
Hey all! I've been busy in the shop; no time to write! The ejector project is coming along nicely. To date, the highest compression I've achieved is about 10 psi, but that was at a fairly low mass...
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Forum: Geothermal & Heat Pumps
09-07-15, 11:43 AM
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Replies: 21
Views: 15,491
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Forum: Geothermal & Heat Pumps
09-03-15, 10:11 AM
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Replies: 27
Views: 13,768
Haha. This thread greatly entertaining!
...
Haha. This thread greatly entertaining!
As you can tell by my username, I'm a big fan of propane as a refrigerant; it is cheap, and has some great properties. But, we need be realistic: HD-5...
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Forum: Geothermal & Heat Pumps
09-01-15, 04:31 PM
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Replies: 220
Views: 150,706
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Forum: Geothermal & Heat Pumps
09-01-15, 10:25 AM
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Replies: 220
Views: 150,706
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Forum: Geothermal & Heat Pumps
08-29-15, 10:35 AM
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Replies: 11
Views: 8,453
Thanks Kurt! I'll keep it in mind. I'd like to...
Thanks Kurt! I'll keep it in mind. I'd like to make convergent / divergent motive nozzles, but it's a tall order at these small sizes. I might try choking down a larger piece of cap tube, but will...
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Forum: Geothermal & Heat Pumps
08-15-15, 12:14 PM
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Replies: 18
Views: 9,906
I've got to agree with Jeff, Mechanic. That...
I've got to agree with Jeff, Mechanic. That configuration is going to produce a lot of superheat. The system either needs more refrigerant and/or a less restrictive metering device. That is a lot...
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Forum: Geothermal & Heat Pumps
08-15-15, 11:54 AM
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Replies: 11
Views: 8,453
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