Recent content by capterdi

OK Russ. Now you are helping me to clarify things. You wrote: "...but changing the pressure is an odd parameter to pick..." I agree 100% with this point. Increasing pressure won´t help. So I see 3 options: 1) Increase water flow. But this goes in the opposite way; will increase water...

This thread is not homework. Sorry for the delay in answering. The steel bar is very long because of the rolling; and has a round cross section. To cool it the bar travels across a set of hollow castings placed one after the other. The castings have water chambers, provided with many holes...

Consider that you are cooling a mass of steel from 1,000 °C to 920 °C. To accomplish this a water flow of 2,000 liters/min is required, and the water outlet temperature increases 10 °C. The water pressure at the inlet is 5 kg/cm2. Now suppose that you increase 30% the water pressure by means...

Thank you, berkeman. Indeed, it´s an old thread. Unfortunately in 2009 I had to deal with many other issues at work, and had to put the problem aside. But right now I´m involved again with the heat transfer problem, so I am asking for more help on the theoretical side.

I have gathered experimental data regarding this heat transfer problem. Unfortunately right now there is no simple way to measure discharge water temperature. On the theoretical approach developed on post # 10 of abovementioned thread, a water temperature increase of 50 °C was considered...

Here are the pictures showing the device in operation.

There is steam generation; but I don´t think it´s very abundant. I will get a picture for you tomorrow, so you can see this. Meanwhile, take a look at the one I´m attaching. Here you see the conduct and the holes for the water.

Bob S, OK..Thank you.

Can you please help me a little more by showing me the formulas that were applied here to get the 20 gallons per minute result?

The flow is infinitely large, that´s true. But not the flow rate. At any given instant of time, if I apply a sufficient amount of water (water at ambient temperature, for example 20 °C) I would be able to decrease the surface temperature of the bar 50 °C. And that´s the solution I´m looking for...

No, it isn´t homework. Regards, capterdi

Hi, Suppose an infinitely long round bar made of steel of 25 mm diameter, which is traveling at a speed of 10 m/sec. The bar is at a temperature of 950 degrees Celsius. I need to find out how much water (liters per minute or liters per second) do I need to put in contact with the bar in order...

CS, OK. I´ll take a look to that source and see what I find. Thanks.

What I would like to know is the discharge coefficient for various types of nozzles. Thank you.

I´m wanting to somehow demonstrate that if we measure the water flow on the header according to squetch for “Case 1” (see attached PDF) using a flowmeter previously installed, we are not going to get the same number for the GPM as if we proceed according to squetch for “Case 2”, where in order...