S70 Intercooler Spray Nozzle

[sleddriver]

Do you have a separate button for your rear hatch window? If so that would be perfect.
It will definitely cool the inter cooler down, especially if the air is dry. Water removes 2257 kj/kg (or 970 BTU/lb) of heat when it evaporates.
The finer the mist of water to increase the surface area, the better.

Yep, the wagon already has a button on the end of the right stalk to enable RW washing.

In a sedan, you could add a button to one of the blank panels next to TRIP, SUNROOF, etc. Could also use a 555-timer IC so one brief touch would equal the pump running for however long you wished. Beats having to hold it down.

So a gallon (3,840 mL) of water weighs ~ 8 lbs., therefore 16 oz (480 mL) will remove 970 BTU. Not sure what the total capacity of the WWR is. I think it's close to a gallon. The rear washer doesn't have access to all of this however. Therefore, a bit less than eight 16oz sprays. There is a low fluid light however, which comes in handy for this application! Water does have a higher SH than alcohol, so no need to add any.

Q now is: How much water is needed to drop T across the IC by say 10°F? How long will it stay there before it rises again? Our old friend the derivative!

[bmdubya1198]

In a sedan, you could add a button to one of the blank panels next to TRIP, SUNROOF, etc. Could also use a 555-timer IC so one brief touch would equal the pump running for however long you wished. Beats having to hold it down.

Pretty easy to fit a custom switch. It could be cleaned up a bit, but I put this in my cousin's car for some separate LED fog lights. Fitment is perfect, but there are still some cutting marks on the panel.

[mecheng]

Do you have a separate button for your rear hatch window? If so that would be perfect.
It will definitely cool the inter cooler down, especially if the air is dry. Water removes 2257 kj/kg (or 970 BTU/lb) of heat when it evaporates.
The finer the mist of water to increase the surface area, the better.

Yep, the wagon already has a button on the end of the right stalk to enable RW washing.

In a sedan, you could add a button to one of the blank panels next to TRIP, SUNROOF, etc. Could also use a 555-timer IC so one brief touch would equal the pump running for however long you wished. Beats having to hold it down.

So a gallon (3,840 mL) of water weighs ~ 8 lbs., therefore 16 oz (480 mL) will remove 970 BTU. Not sure what the total capacity of the WWR is. I think it's close to a gallon. The rear washer doesn't have access to all of this however. Therefore, a bit less than eight 16oz sprays. There is a low fluid light however, which comes in handy for this application! Water does have a higher SH than alcohol, so no need to add any.

Q now is: How much water is needed to drop T across the IC by say 10°F? How long will it stay there before it rises again? Our old friend the derivative!

I am not an HVAC engineer and its been many years since I studied it in school but I believe you will have to run a Thermal FEA to figure out the temperature., I'm not even sure you can calculate it as you have forced convection, conduction (since the water will be colder than the coil temperature) and evaporation.


I think the water also cools by raising its temperature not just by evaporation because you need 1BTU/lb F so if the water is at 70F and the intercooler is 120F,

E=cp m delta T = 1*1*50 = 50BTU, but you can see it is minimal when compared to evaporation


There are cooling tower calculators online, but I'm not sure they apply or that we have all the inputs. Any Engineers want to chim in...........

[sleddriver]

A multi-channel temp logger would come in very handy here, eh? Lots of variables to consider.

The lower ambient temps have really made a difference in overall performance. Despite the fact that we're about 10°F over "normal" Oct temps currently. Heck, even water-misting the A/C cond. will help it work better and lower the head pressure during Summer heat when stuck in traffic.

I routinely open the hood when I arrive home in the evening for a few hrs to allow the engine heat to radiate to the sky and convection to occur. Otherwise, my already hot garage just becomes even hotter! Point is the hood is open, it's now a habit, thus I regularly check fluids the next day before starting. Adding WW water is already on the list.

[mecheng]

A bit of an update, I found some misting nozzles online, I am choosing the 200～290ml / min

https://www.amazon.ca/gp/product/B01KQ1 ... VBZ2&psc=1

I need some help on where to find small Electrically controlled valves.

Requirements:

*They must work on 12V or less, ideally 12V
*The inner diameter of the hose is only 4mm, therefore ideally they are small or similar and can be adapted. I know most electrically controlled valves come in big sizes so I need something small
*I need one that is normally open, and one that is normally closed

The idea is that the normally open valve will be for the windshield and the normally closed valve will be for the intercooler. Flip a switch and it closes the valve for the windshield and opens the valve for the intercooler and then I pull on the stalk to spray the intercooler only.

If anybody has any info/leads on such a small electronic valve, please let me know.

[sleddriver]

Perhaps another option for you is to get a wagon WW reservoir from a JY as it'll have positions for two pumps instead of one. Most likely will also have the second pump still attached. Then you just wire a switch to power it for intercooler misting.

[mecheng]

Perhaps another option for you is to get a wagon WW reservoir from a JY as it'll have positions for two pumps instead of one. Most likely will also have the second pump still attached. Then you just wire a switch to power it for intercooler misting.

I don't want to add too much extra complexity and take up needed room in the engine compartment.
I found some 12V solenoid valves on ebay, still curious if anyone has any specific recommendations.

[sleddriver]

It wouldn't take up any additional room as you'd replace the WW reservoir currently in your sedan with one from the wagon.

[erikv11]

Perhaps another option for you is to get a wagon WW reservoir from a JY as it'll have positions for two pumps instead of one. Most likely will also have the second pump still attached. Then you just wire a switch to power it for intercooler misting.

In fact the wiring will already be there in the engine harness, too. So the electrical side of things would come down to plugging in the pump (trivial) and finding the right wire under the dash or in the steering column. Then wire in the switch or as suggested, use the stalk from a wagon.

[mecheng]

Interesting, I didn't know the wagon has a separate reservoir....