Recent content by dextermech

How long does it take to heat them with the grids? Airflow is not ideal because if the pellets are dusty as they usually are, the dust separates out and clogs screens, air filters...it fouls everything. Also, the largest ring compressor blower that is "affordable" is about 800 CFM, not enough...

I need to think of some "outside the box" heating methods for a column of plastic pellets. Currently hot air is blown through the pellets to heat them. Another way is to run them under an IR heater. Can anybdy think of some alternate ways? Some sort of radiaion, like microwave? Help...

My top and bottom boundary plates (actually made of 1018 CRS) are #11 and #12, so I wasn't counting them, but thanks for clarifying that.

OK now there are 2 different answers here. Do we know what a plate type heat exchanger is? If I look at one plate, do I cound the surface area of ONE side or both sides?

I'm going to punch ribs into the plates to add turbulence, which will hopefully increase the "U" value... So that's interesting, I count the surface area of BOTH sides of a single .036" thick plate...which means my HX should only be half as big and half as expensive as I thought...

So then the answer in my example above would be 10 square feet?

This may sound like a very stupid question, but if I have (10) one square foot aluminum plates stacked in a plate-type HX, is my total heat exchange area 10 square feet, or 20 square feet? I assume it's 10?

What is considered bigger than a "small" company these days?

The $185/week is for a family plan.

At my current job, I have to pay $185 per WEEK for health insurance. The employer pays 50%, we pay 50%. No dental, no vision. Have any of you ever HEARD if benefits this bad? It's really starting to tick me off...

Yank It confused me too at first. I never did an HX before.

Aren't single pass plate exchangers truly counter-current?

The temperature differential? You mean use LMTD but fudge it a bit so that I don't divide by zero, or do you mean just use 10 degrees? Thanks so much for your help.

Something still doesn't make sense. Maybe I am not plugging into the LMTD properly? When they say: T1: Hot stream inlet temp T2: Hot stream outlet temp Does "hot stream" mean the flow through ONE side of the exchanger, or is T1 and T2 on the same (inlet) side of the HX? If I blow 250F air...

So should I, for the sake of initial calcs, assume that say the cold side increases in temp less than the hot side lowers in temp???