Well dianad in any operation you should first consider your power then calculate the fuel neeeded for this power so you should use the 412.5 kg/h gas flow rate.
From the gas flow rate calculate the required air to make your Stoichiometric ratio for the boiler which the manufacturer specified and...
Well steam and air coming from the top threw vents and dryers will not give you that much energy for the installation costs and the required systems, and besudes most of the time they are sources of getting rid of contamination and cleaning the system
Look dianad,
You said that
Boiler power (P): 6500 kW
Boiler efficiency (E): 87,8%
Natural gas HHV: 64606 kJ/kg
Air flowrate (Q(Air)): 4265,4 kg/h
Air fuel ratio (AF): 18 kgAir/kgFuel
these are known values right.
This means that air flow rate is already a known value and you are trying to...
Well this is called Throttling, It's a process that has a constant enthalpy but its main idea is that it reduces preassure at contant enthalpy. it can be seen in auxillary lines that takes steam from high pressure from a certian boiler for a low pressure required steam. well to utilize the steam...
okay it goes like this:
U are calculaing something already calculated and you are trying to calculate it agaian, and the first time it may be calculated wrong. is this boiler working with a stio. ratio of 1 or more? because if you get these reading in a practical way then the boiler may be...
Well first of all altough you may be doing the heat transfer part right you may be forgetting that there is a heat rise due to working fluid pressure lines losses and friction.
Well gepman and ir stuff are saying and talking right, it's as simple as Q=m*Cp(dT), but there is something missing is that this depends on the coil diameter which means the coil wire diameter and if the coils are wrapped around something. if the coil wire has a large diameter compared to the...
cooling a space with a material at 400 degrees being cooled in it is what I understand from your posting.
it depends the material is in what form! Is it spread over a large surface or in a vessel or divided into parts, all these aspects differ from each other because it will account for the heat...
