@whiteangel
There is a very good reason that HC refrigerants are only used in industrial applications. Let me take the opportunity to clarify the safety aspect of HC refrigerants.
Let's say you fill your car's A/C up with Propane instead of HFC134a and you get into a frontal collision.
spancolor: #ff0000""You cant fill with propane. Its a fuel gas, refrigeration standards require stringently purity. To say R290 is propane is not correct. Chemically it may be true but technically still incorrect to say you can charge AC with propane. R290 will have far more ingredients like odor agents & UV visibility agents.
With HFC134a, the gas would simple dissipate into the atmosphere. with HC refrigerant there is a real chance of it blowing up or burning down your car. Worse yet, what would happen if the HC refrigerant leaks into the passenger compartment while you're smoking.
spancolor: #ff0000""
HFC wont dissipate being heavier than air it will pool around. It may come in contact with hot engine and decompose into toxic gases as decomposition temperature is quite low. Further HFC leaking at high pressure with compressor oil is not only flammable, its explosive upon contact with hot surface like your engine. Flame is not needed here.
If HC leaks into passenger compartment it wont catch fire out right from a cigarette because its heat energy is too low and it will take some time for the gas to reach stoichiometric composition with air. Before that, the clouds of smoke formed and odor will alert the drive to put windows down. In contrast, leaking HFC in passenger compartment can be inhaled undetected and cause loss of oxygen knocking the driver unconscious.
Off course what ever said above is simply exaggeration of worst scenarios. Modern air con system are designed with all safety issues in mind therefore you don't see HFC-134a killing someone despite being so dangerous. Similarly with all safety issues considered, a HC charged system will be as safe as any other.
No offense but I don't understand what is the opportunity you are trying to avail and what point you are trying to made beside usual copy-paste from information from the internet. Do read and understand a thread before posting replies. I mentioned all hazards, advantages and disadvantages in my post clearly. Your response at best is an incomplete detail of what is already posted. The flammability test is only conducted at room temp, pressure and oxygen concentrations as mentioned clearly above. All refrigerants are flammable up to a degree under pressure with air / oxygen. Off course if one has to die from refrigeration poisoning, then look no further than HFC gases. R134a leaking from you car AC will turn to hydrofluoric gas upon contact with hot engine and can easily kill anyone who inhales it for instance the ac technician working on it. Take a lesson in refrigeration and basic chemistry to understand principles better. As a lot of copy-paste information is available on the internet to mislead people.
All refrigerants can kill humans either in form of poisoning or explosions. For someone who fears this much, simply don't use air cons and discharge gas from your car AC's. Ammonia is used in commercial chillers which again is extremely toxic. If safety is your concerns, then again low pressure and small quantitative requirements of HC's makes them extremely safer than HFC's and CFC'S. An HC charged system is less likely to explode and kill people versus HFC based system. Mind you, an exploding AC is a bomb anyway regardless of refrigerant use and HC based system is less likely to explode due to their low pressure and cryogenic nature.
We had a domestic split air con charged with R290. These are not your typical LG, SG, Samsung, Waves or Dawlence type toy units. This unit was a heavy duty Trane / American Standard brand and for the capacity of 2.5tons it was really hefty.
I ran my car A/C charged with R290 for a full year without problems until i sold it. Yes i did inform the user that AC is filled with high performance gas which is extremely flammable.
Regarding EPA, we all know how bureaucratic they are. People drive with CNG & LPG cylinders in their cars. In comparison of safety, your air con will have very small volume of so called "flammable" gas. LPG and CNG is continuously combusted inside engine creating flames. Your air con refrigerant even if flammable is pressurized in a closed system in absence of air / oxygen.
I grew up playing with refrigerants and refrigeration system so please no monkey responses with copy-paste information. I do know what I am talking about and do care to inform potential consumers.
All I want to know is opinions from interested people willing to try such product in your automotive / domestic air cons provided all your concerns safety were met using scientific proofs. Any queries, post here.
Thank you!