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Forum: EcoModding Central

04-23-2019, 12:25 AM

Replies: 89

Poll: Improving the AC system's efficiency

Views: 8,755

Posted By jeff5may

CO2 isn't a bad refrigerant gas, but the problem...

CO2 isn't a bad refrigerant gas, but the problem is that it has a whole lot more pressure inside the system. Where a typical auto AC system might reach 300 or so PSI, a carbon dioxide system operates...

Forum: EcoModding Central

04-20-2019, 09:57 PM

Replies: 89

Poll: Improving the AC system's efficiency

Views: 8,755

Posted By jeff5may

If you are operating the system within the...

If you are operating the system within the envelope of r134a, it's not too hard to beat. Propane especially is more forgiving of superheat because it has higher specific heat than r134a.

Forum: EcoModding Central

04-19-2019, 12:12 PM

Replies: 89

Poll: Improving the AC system's efficiency

Views: 8,755

Posted By jeff5may

Ok so the general consensus is that filling up...

Ok so the general consensus is that filling up your automotive air conditioning system introduces the risk of fire in case the sealed system is compromised. Some agencies are advocating the move away...

Forum: EcoModding Central

04-16-2019, 04:38 PM

Replies: 89

Poll: Improving the AC system's efficiency

Views: 8,755

Posted By jeff5may

Refrigerant grade propane is r290. It has roughly...

Refrigerant grade propane is r290. It has roughly the same pressure range as r22. Butane and isobutane both have lower pressures than r134a. If you are running a txv you'll have to run a blend....

Forum: EcoModding Central

04-15-2019, 02:38 AM

Replies: 89

Poll: Improving the AC system's efficiency

Views: 8,755

Posted By jeff5may

I believe the r12 / r134a substituters were using...

I believe the r12 / r134a substituters were using about 70 percent butane and 30 percent propane to achieve the same vapor pressure in the system. As usual, a txv works better than a fixed orifice,...

Forum: EcoModding Central

04-13-2019, 11:38 AM

Replies: 89

Poll: Improving the AC system's efficiency

Views: 8,755

Posted By jeff5may

The refrigeration industry has been having a very...

The refrigeration industry has been having a very hard time in the last few decades. The patents have run out on the current batch of gases and the profit margin has dropped. Considering the gwp...

Forum: DIY / How-to

01-08-2019, 12:30 AM

Replies: 24

Cooling fan on/off

Views: 4,751

Posted By jeff5may

Ok, so per the wiring schematic you posted, you...

Ok, so per the wiring schematic you posted, you should be able to control the fan at will while the ignition is on. Use the Blu/wht wire at the underhood junction box or at the a/c thermostat. Splice...

Forum: Saving@Home

01-31-2018, 12:53 PM

Replies: 65

LED not that efficient.

Views: 8,725

Posted By jeff5may

Ok ladies and gentlemen, let me clear up some...

Ok ladies and gentlemen, let me clear up some questions surrounding this new LED light fad.

I didn't know this thread existed until I got a message from somewhere else. I don't know if this...

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