Moderator: 3ne2nr Mods
It eh ozone friendlyTed_v2 wrote:all these numbers and letters but no sr20 or rb25 i am disappointed
Gladiator wrote:The efficiency of a system has much more to it than just the system pressures. A big factor is the heat carrying capacity of the refrigerant itself.nervewrecker wrote:Gladiator wrote:nervewrecker wrote:Strugglerzinc wrote:Do any advantages outweigh the possibility of explosion?
In order for an explosion to occur you must have combustion, for combustion to occur you must have oxygen. No system has anything besides refrigerant in it (at least properly installed ones).
If for some reason someone was to go up to the evaporator with an ice pick or the likes and bore a hole in it, the refrigerant charge of an appropriately unit sized for that room is too small for an air-fuel mix that allows for combustion.
Energy consumption is under 2/3 that of conventional units.
The advantages are more related to the environment, propane being non - ozone depleting and non global warming. The efficiency is relatively the same as R410.... don't let the marketing fool you.
The other main advantage is that it can be used as a drop in replacement for R410. So you can still use your old AC and pump propane in it.
Far from the truth.
R290 is compatible with mineral and POE lubricants. It can be retrofitted into R22 systems easier because operating pressures are similar to it.
R410A operating pressures are almost double that of r290.
https://www.agaseurope.com/media/2411/r ... -chart.pdf
R-410A requires a pressure of approx 118 PSI for 5 degrees C
https://www.agaseurope.com/media/2670/r ... -chart.pdf
R-290 requires a pressure of approx 67 PSI for 5 degrees C
https://healthinnovationweekdc.com/r22- ... emp-chart/
R22 requires a pressure of 68 PSI
Because the charge / amount needed to do the same job is smaller it has a lower current draw on the compressor.
You will need to change the metering devices on R410a systems to accommodate it if its capillary tube type or the operating pressures will not allow for phase change.
Global warming potential = 3
Ozone depletion potential = 0
Global warming potential = over 2000
Ozone depeltion potential = 0
I have in fact compared a 410A unit to an R290 unit side by side, same capacity. The R290 does in fact have a lower current draw.
I like where this discussion is going btw.
Btw iirc higher system pressures result in increased efficiency. That is why r410 systems are more efficient than r22. If r290 has a similar operating pressure to r22 then it would be less efficient.
Please read the following paper especially section 6.2 LCCP Comparison
ARI: GLOBAL REFRIGERANT ENVIRONMENTAL
EVALUATION NETWORK (GREEN) PROGRAM�
https://www.google.com/url?sa=t&source= ... dgqT_PdahT
rspann wrote:Nervewrecker, you ever hear about people gassing up car A/C with cooking gas? Serious question. I hear about a man in Penal who doing it.
rspann wrote:Well he gas up a BMW with a leaking evaporator and it burn down the next day. You can see the pics in the accident thread.