I'm not precisely sure what the system looks like, but since it is a boiler I would expect to see the latent heat of vaporization included. I don't see it in your equation.
My experience is with direct fired heaters. I would suggest you find seek out the papers by Lobo and Evans in addition to the work of Hottel to understand more.
1. crossover temperature - this is temperature of the fluid being heated at the point exiting the convection section/entering the...
The heat flux information is usually found in the heater data sheet not the burner data sheet. If you have it, that would be the best place to start.
As an estimate, take the absorbed duty in that section of the heater divided by the external surface area of the tubes. That will give you an...
mazamm,
The velocity and the volumetric flow rate are dependent on the density of the gas.
Let's compare two cases. In both cases, the mass flow of gas through the system is 100,000 lb/hr.
Case 1: At the inlet to an air pre-heater the gas temperature is 60F. The density of the gas is...
Fans are volumetric machines. The amount of power required to move a gas is a function of the volumetric flow rate of the gas. In order to reduce the size of the motor required for the fan I would guess that the fans are placed where gas temperatures and consequently volumetric flow rate are...
I'm assuming the OP is talking about furnaces which are called fired heaters in my line of work. My company supplies fired heaters primarily for oil refineries. While fired heaters come in many configurations, almost all have a radiant and a convection sections.
I'm not sure exactly what...
Curiosity got the better of me. It looks like it is true. From abet.org:
"ABET accredits graduate programs within applied science and engineering only. However, within engineering, institutions are restricted to accrediting only one program per discipline per level. Because graduation from an...
As strange as it sounds, it is my undeerstanding that ABET will only accredit an undergraduate OR graduate program, but not both at the same school. Most schools choose to get the undergradute accreditation for obvious reasons.
