I was thinking about something. If for some reason, in another kind of application, the temperature of the oil (or maybe it would be water) is lower than the substance to be cooled, would we calculate the heat transfer rate using Q = m * Cp * dT ? I mean, would we use the Cp of the oil (or...
Thank you very much TD2K.
This summarize very well what are my options. I'll check that out to see if the numbers make sense :)
Now, I would like to check about the log mean dT.
For example, let's say that the inlet temp is 320F and the outlet temp is 315F, and that the Bitumen temp is not...
Hi guys
I have talked with an engineer at the company that designs and makes our bitumen tanks. He sent me two charts that give a good approximation of "Average Overall Heat Transfer Coefficients" for different heating and cooling applications. Also, he gave me an approximate heat loss...
Wow, that's a very good explanation of what is going on. Thank you very much. I should be able to do something good out of all this useful information.
I'll give you guys some feedback of what are my results when I get a better idea.
Thanks again
Hi TD2K
In fact, the insulation is made of two layers of 2'' mineral wool, which gives 4''.
As for your 2 paragraph, I'm not sure what I am supposed to compare. What do you mean by:
" If the two compare reasonably well, then you know the inside bitumen is close to 320F AND its heat transfer...
The thing is that the boiler's firing rate is modulated according to the thermal oil's temperature, and therefore never really gets turn off. In fact, it works 24hrs a day, at different rates, but still uses fuel. It seems like heat is always transferred to the bitumen in the tank, even though...
Thanks stoneCold
We are aware of the fact that if temp of the bitumen gets too low, it could be really bad. That is why I am in charge of calculating those heat transfer rates, to figure out if shutting down the thermal oil boiler would be too drastic. The next step is actually, as you said, to...
Also, I forgot to mention that the bitumen inside the tank doesn't move that much; we could consider it as almost static. What is its mass flow then ?? I think I am supposed to use that to calculate the h of bitumen.
Regards
Marc-Andre
Hi
I am working on an energy efficiency project in an asphalt making company in Quebec, Canada. I want to calculate the Heat transfer rate inside the Bitumen tanks from the thermail oil pipes to the bitumen. I've got all the data for the thermal oil, but I am still looking for the Thermal...
