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Search: Posts Made By: marx290
Forum: Geothermal & Heat Pumps 11-20-16, 03:29 PM
Replies: 10
Views: 4,680
Posted By marx290
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...
Forum: Geothermal & Heat Pumps 11-13-16, 12:00 PM
Replies: 10
Views: 4,680
Posted By marx290
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...
Forum: Geothermal & Heat Pumps 09-21-15, 01:58 PM
Replies: 9
Views: 6,878
Posted By marx290
Talking 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...
Forum: Appliances & Gadgets 09-17-15, 01:28 PM
Replies: 81
Views: 33,425
Posted By marx290
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...
Forum: Geothermal & Heat Pumps 09-16-15, 09:08 AM
Replies: 21
Views: 5,623
Posted By marx290
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...
Forum: Geothermal & Heat Pumps 09-01-15, 05:31 PM
Replies: 220
Views: 51,294
Posted By marx290
My friend is interested in getting one of these: ...

My friend is interested in getting one of these:

Small Volume 12V DC Tiny Compressor for Air Conditioner Refrigerator | eBay...
Forum: Geothermal & Heat Pumps 08-15-15, 12:54 PM
Replies: 11
Views: 3,512
Posted By marx290
Here's a little information on assembling my...

Here's a little information on assembling my ejector system, and some preliminary results. It's a lot of fun!

Ejector Assembly Construction | musings on entropy...
Forum: Geothermal & Heat Pumps 07-30-15, 12:31 AM
Replies: 4
Views: 1,632
Posted By marx290
Embedding Thermoucouples Into Refrigeration Lines

I thought I would offer my experience making thermocouple sensors which are sealed directly inside of refrigeration lines. I did this so I could get more accurate or responsive readings, when I'm...
Forum: Geothermal & Heat Pumps 07-26-15, 11:52 AM
Replies: 3
Views: 1,661
Posted By marx290
Hey all! That's my video! Sure is nice to know...

Hey all! That's my video! Sure is nice to know that someone is watching. I haven't been on the forum in a while; been too busy in the shop! :D

It takes up too much of my time to write, so I...
Forum: Geothermal & Heat Pumps 03-24-13, 05:25 PM
Replies: 1,942
Views: 1,640,684
Posted By marx290
You sound really excited cbearden. It's a lot of...

You sound really excited cbearden. It's a lot of fun working with this stuff. I don't know your background or what kind of equipment you have, but with an old hermetic compressor you can fashion a...
Forum: Geothermal & Heat Pumps 03-11-13, 11:41 AM
Replies: 282
Views: 118,517
Posted By marx290
I lived in SW Pennsylvania where we had pretty...

I lived in SW Pennsylvania where we had pretty cold, sustained winters. There were a number of clear sunny days usually with a lot of wind. I always wanted to take advantage of that incoming...
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