12v r600 mini air condition for air to liquid inter-cooler setup.

[nervewrecker]

I get heat soaked with my TMIC being right next to my turbo and a friend of mine is doing an air to liquid intrecooler setup in his ride.

R600 is the proposed replacement for R134a and the operating pressures are way lower. Needs less than 10psi on the suction side for a temp of just about 0 degrees C and just over 100 psi on the discharge side for condensation. of the refrigerant. The bigger the condenser and air flow over it the lower the pressure.

Refer to pressure temp chart.

https://www.agas.com/media/2423/r600a-i ... -chart.pdf

Oil coolers are good candidates for a condenser or maybe a small coil setup from a failed window unit.

Evaporator is submerged in the water to air inter-cooler or lines brazed to the surface. Can be simple pipes externally or pipes running through the system.

Compressor wise, the most costly option is this guy, designed for 134a but r600 is compatible with the lubricant. Line size will determine velocity basically.

Advantage - small, ready made.
Disadvantage - cost.

Second option is a 12v DC air compressor in a closed loop system. May not be able to produce the velocities for oil return unless there is an oil trap and sump.

Disadvantage, size, unsure how the system will react to oil circulating and some brain storming.
Advantage, cheap.

Third option is detaching a motor from compressor in a 1/3hp piston type refrigeration compressor. I have one where the motor burnt. Any good machine shop can couple the compressor to a new motor. Closed loop system where lubricant is compatible. Motor in question is a 20V dc from a dewalt drill and a drok 12V DC to 20V DC for power supply. I have used these to step up or down voltages i audio installs.

https://www.amazon.com/DROK-090183-Wate ... B00JUHEJJ2

Advantages - smallest, transformer is the only part that needs to be purchased. Can produce the most torque and velocity. its an open type compressor design so oiling is not an issue for the motor. The lubricant remains in the system.

Biggest challenges here are calculation of velocities, capacity and the metering device. There is the possibly a txv can be used from an vehicle. The ones from the Doosan mini excavator are good candidates or Subaru. Some have a screw to adjust the flow and temp.

Pic for reference:

https://globalair.us/ex-5702.html

price is about $200 TTD. They sell in couva inside the road opposite the recently opened gas station.

Its barely bigger than a matchbox. All compression fittings and flare nuts available at rapid radiators on cross crossing San Fernando. I had fitting made up from him already. 15 minutes you in and out.

Flex lines can be used to move refrigerant with compression fittings. I have obtained steel braided and sleeved lines from Trinidad hose on crossing also. Simple 1/4" nylon tube can do the job and handle pressure. The nylon is cheaper and flex easier.

Thoughts?

The aluminum alloy my TMIC is made of makes it almost impossible to attach lines to the exterior of it. I not sure if plumbing solder can do the job.

[Duane 3NE 2NR]

What's the possible additional weight of the system?

[VexXx Dogg]

Heat soak is only a consideration when you’re driving slowly after a spirited run. Once the car moving air flows over the tmic and keeps things frosty.

I mean you can put a probe and collect some IAT data

I did the fmic conversion and honestly the IAT graph patterns didn’t change significantly. Maybe if you’re competing and need a couple extra seconds off a laptime or something. You might get better benefit of heat wrapping your pipes and possibly running a larger tmic

[phreakazoid]

Have you considered a peltier ac setup?

[nervewrecker]

Have you considered a peltier ac setup?

Capacity and heat dissipation is the issue here. Depends on where you locate it you still need a means of heat dissipation and ambient temps are rather high so the capabilities are limited. They are accurate to a fraction of a degree and can get to that point within one second.

Liquid to air is always a better means because the liquid reservoir acts as a buffer for surge or drops in ambient temps. Liquid is also a better conductor. Viable liquids are traditional oil based coolants, coolants mixed with water, mineral oil, ethanol (flammable and will not lubricate parts where there are bearings etc) or a mixture or oil and ethanol. Best example are chilled water hvac systems vs traditional types. A 60 tonne capacity system is barely larger than a 40 tonne and handles surges better. With traditional types if a condenser fan stalls, coil is obstructed by debris etc you get an almost instant spike in temps and current draw. Control fail safes have to be functional (high pressure switch, overload relay, overload CT etc). Any malfunction can result in expensive repairs or complete destruction.

Peltier are great for small applications like personal computers and micro applications.



The mini comp above weighs in at just over 1.5 pounds.

There is also a liquid chiller system that can be a fail safe for small servers etc.

https://www.rigidchill.com/compact-liquid-chiller/

Is just an idea that pop up. But spare time is not a luxury for me. For the longest while I considering something of that sort until one of my peers in the usa had to work on some medical lab precision system and it had one of the comps.

https://www.rigidchill.com/wp-content/u ... -RIGID.pdf

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