Propane (R-290) for heat pumps? - Page 8

Xringer · 09-23-11, 11:35 AM

How are the sweat nipples attached to the HX?
How much protection (from heat) would be needed for the HX while brazing on copper lines?

AC_Hacker · 09-24-11, 01:18 AM

Quote:

Originally Posted by Xringer

How are the sweat nipples attached to the HX?
How much protection (from heat) would be needed for the HX while brazing on copper lines?

You might want to search the 'Manifesto' thread. I covered this some time back, in pretty descent detail.

If I remember correctly, there might even be a video.

-AC_Hacker

Xringer · 09-24-11, 08:24 AM

I should have known. I had not bothered to look, because I had it in my mind that you had used a HX with screw-on connectors.
(Plus it's a massive thread)!
I will get to that when I have an hour or three to spend reading..

PS:
I'm currently looking around for a good high pressure HX with flare fittings..

Edit:
Thanks for the Very interesting read (and video)..
I'm saving the link here, so I won't have to search again.
http://ecorenovator.org/forum/geothe...html#post12230

Xringer · 09-25-11, 12:16 PM

Another propane sensor. With the board. Looks like it uses about 1w at 5vdc.

New Smoke Methane Alcohol Propane Hydrogen Sensor MQ-2 | eBay

AC_Hacker · 09-25-11, 01:38 PM

Quote:

Originally Posted by Xringer

I will get to that when I have an hour or three to spend reading.

That's why god invented search engines.

-AC_Hacker

Xringer · 09-25-11, 06:08 PM

Humm, wasn't that Al Gore??

I hope someone sees that sensor and buys one or two, so we can have a review..

It seems like every time I start looking at my Watch List on Ebay, my wife walks in!
She gives me that look, tells me that we don't need anything else..

Geo NR Gee · 09-25-11, 07:15 PM

Quote:

Originally Posted by Xringer

Humm, wasn't that Al Gore??

I hope someone sees that sensor and buys one or two, so we can have a review..

It seems like every time I start looking at my Watch List on Ebay, my wife walks in!
She gives me that look, tells me that we don't need anything else..

okay, I'll buy it for you and then you try it out and let us know how well it works.

Xringer · 09-25-11, 09:57 PM

I'm just curious about these sensors right now, since someday there is a chance
that we might be using propane as a refrigerant.
At the current time, I'm going to stick to using the slightly expensive R410A stuff.

410 R410 R410A R 410A REFRIGERANT TANK 1/4 SAE OUTLET | eBay
For 2 cans, it seems to be about $24.44 a pound..

Or,

R410a, R410, R-410 Refrigerant 11.2lb #15 | eBay
For one tank, this seems to be about $11.52 a pound..

Hey! That's a very large difference.. Did do my math right?

Xringer · 09-29-11, 06:51 AM

R290 Reference doc:
http://www.google.com/url?sa=t&rct=j...wnjmCQ&cad=rja

Pressure temperature table of R600a vs R143a and R290 vs. R404A And app notes.

Another report: (This may have been posted here before).
http://www.icarma.org/green/document...inal-030404.pd

Xringer · 10-16-11, 09:55 AM

Yeepee, the 2011 Annex 32 Reports are out!

Annex 32 publications

09-23-11, 11:35 AM	#71
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 115 Thanked 250 Times in 230 Posts	Dudadiesel questions How are the sweat nipples attached to the HX? How much protection (from heat) would be needed for the HX while brazing on copper lines?

09-24-11, 08:24 AM	#73
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 115 Thanked 250 Times in 230 Posts	I should have known. I had not bothered to look, because I had it in my mind that you had used a HX with screw-on connectors. (Plus it's a massive thread)! I will get to that when I have an hour or three to spend reading.. PS: I'm currently looking around for a good high pressure HX with flare fittings.. Edit: Thanks for the Very interesting read (and video).. I'm saving the link here, so I won't have to search again. http://ecorenovator.org/forum/geothe...html#post12230 Last edited by Xringer; 09-24-11 at 09:53 PM.. Reason: Brazing Movie call

09-29-11, 06:51 AM	#79
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 115 Thanked 250 Times in 230 Posts	R290 Reference doc: http://www.google.com/url?sa=t&rct=j...wnjmCQ&cad=rja Pressure temperature table of R600a vs R143a and R290 vs. R404A And app notes. Another report: (This may have been posted here before). http://www.icarma.org/green/document...inal-030404.pd Last edited by Xringer; 09-29-11 at 07:31 AM..

09-25-11, 12:16 PM	#74
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 115 Thanked 250 Times in 230 Posts	Another propane sensor. With the board. Looks like it uses about 1w at 5vdc. New Smoke Methane Alcohol Propane Hydrogen Sensor MQ-2 \| eBay

09-25-11, 06:08 PM	#76
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 115 Thanked 250 Times in 230 Posts	Humm, wasn't that Al Gore?? I hope someone sees that sensor and buys one or two, so we can have a review.. It seems like every time I start looking at my Watch List on Ebay, my wife walks in! She gives me that look, tells me that we don't need anything else..

09-25-11, 09:57 PM	#78
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 115 Thanked 250 Times in 230 Posts	I'm just curious about these sensors right now, since someday there is a chance that we might be using propane as a refrigerant. At the current time, I'm going to stick to using the slightly expensive R410A stuff. 410 R410 R410A R 410A REFRIGERANT TANK 1/4 SAE OUTLET \| eBay For 2 cans, it seems to be about $24.44 a pound.. Or, R410a, R410, R-410 Refrigerant 11.2lb #15 \| eBay For one tank, this seems to be about $11.52 a pound.. Hey! That's a very large difference.. Did do my math right?

10-16-11, 09:55 AM	#80
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 115 Thanked 250 Times in 230 Posts	Yeepee, the 2011 Annex 32 Reports are out! Annex 32 publications