Results 51 to 60 of 60
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11-09-2011, 06:38 PM #51
Re: Natural refrigerants - heat-pump friendly?
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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11-09-2011, 06:48 PM #52
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11-09-2011, 06:56 PM #53
Re: Natural refrigerants - heat-pump friendly?
I understand, but the only 'evidence' people who are against HC refrigerants as far as safety reasons, are the stories about how normal safe procedures weren't carried out, and the resulting fire/explosion.
I'm not pro HC by any means, but talking about the flammability, when the job wasn't done the correct way...
OK it was more hazardous and did damage to the fridge with the flame. But none of us like burning HFC refrigerants or oil either.Last edited by paul_h; 11-09-2011 at 06:58 PM.
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11-09-2011, 07:21 PM #54
Re: Natural refrigerants - heat-pump friendly?
Yes I would say so...the video's we watched included systems not fully recovered and leaking tubework ..... they just put a flame to them and all that happened was a torch like flame, similar to a plumbers propane torch, no big bang .... nothing
The time you have a problem is if the exact mixture is present to explode (2-10%) a small leak will disperse easily and are large leak will quickly saturate the air above its explosive mix ... so fairly safe really
there is one big hoax going round where a domestic blew up the kitchen and took the rear wall down .... that was proven by insurance investigators to be a delibrate explosion using the house hold gas appliance .... the refrigerator did not have the charge/mass to cause that damage ... worst way with domestics is if it explodes it will take some of your hair off and you may need clean pants ... well probaly will need the pants !
R's chillermanIf the World did not Suck, We would all fall off !
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11-09-2011, 09:53 PM #55
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11-09-2011, 10:24 PM #56
Re: Natural refrigerants - heat-pump friendly?
bp experimentented with hydrocarbons at their services on the m6 at leicester forest. they fitted a coldroom , walk in freezer and aircon was installed, the fridge condensers were foreign and they had to install an extract system for the aircon.dont know how it went after the numpty that installed it crossed his pipework for the condensers so i had to pump down and swap condensers over-it prob got ripped out because on a different site the same guy degassed a 5kw fujitsu with 2kg r22 and charged 350grm on isceon 59, i spent ages pressure testing it to find no leaks!
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11-09-2011, 10:28 PM #57
Re: Natural refrigerants - heat-pump friendly?
Desa
Some others are looking at "miniturising" ammonia compressors:
http://www.ammonia21.com/content/art...ompressors.php
it's funny that NH3 was used in the early days of cooling and i presume a lot of work was done at the time to make domestic versions before the "invented" refrigerants came out, and here we are redoing all this work!!
For me NH3 wins every time, relatively safe, requires a proper training to handle and cheap to buy!
alecMostly found in the southern part of this green and pleasant land.
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12-09-2011, 12:42 AM #58
Re: Natural refrigerants - heat-pump friendly?
Thanks al,
A GOOD READ, seems Mycom are onto it with a hermetic scroll for NH3
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12-09-2011, 01:22 AM #59
Re: Natural refrigerants - heat-pump friendly?
I could only find the first part of the article and i went to the MYCOM website but there is no mention of anything in the 5-20 kw range except some CO2 machines. Maybe i missed something.
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04-10-2011, 05:05 PM #60
Re: Natural refrigerants - heat-pump friendly?
Theres an Austrian heat pump manufacturer (neura) that uses propane extensively in their range of DX heat pumps up to 30kw. All equipment is outdoors though and the heating water is circulated to the exchanger outside which is its biggest downfall. Achieving COP's of 5+ at the unit, but the losses in having to tranfer the water out of the house is not accounted for in that COP.