The equipment rating should be in btu/hr rather than btu. Use the formula Q = 1.1xcfmxdT. As you have no air circulation, after adding up all the heatloads in the room and getting the total heat input in btu/hr, divide the room volume by 60. This gives you the temperature rise per minute.
First get the mass flowrate of methane. If you know the calorific value in btu/lb (better NCV or LHV), then total heat flowrate/LHV gives you mass flowrate of methane in lb/hr. That is the mass flowrate you require at any pressure. For piping calculation, if you can get an equation that directly...
There are two non practical assumptions here. One is that there is no pump in the system. Second one is that pressure in the header remains constant. I don't have issues (if mods forgive me) as long as this is a homework problem. Otherwise, better description of the system may yield better...
Incase of sponge, the area that experiences the force is more and that is why pressure is less. Press the sponge to such an extent that it will not deform and then your pressure reading should be same with that of hard surface.
The site seems to be down at the moment but there are online calculators for recips and centrifs at www.processassociates.com
To to process tools section.
The fluid power consumed by a compressor can be calculated by mass flowrate of refrigerant times the enthalpy difference. The enthalpy of super heated gas is more than saturated gas so power consumption will be less. However, there are limitations to the extent of superheat and you can get those...
Yes, provided listed cfm is acfm at 175 psig
Yes.
The above equation I wrote considers isothermal condition i.e PV = constant. When you are decreasing the pressure in a pressure reducing valve, the temperature change in the fluid is not significant (at least for the sake of...
I would like to expand Q_Goest's comment a bit. When you speak of PD devices, either mass flowrate or volume flowrate at standard conditions (i.e scfm) remains constant irrespective of discharge pressure, keeping suction pressure constant, but actual volumetric flowrate (i.e acfm) changes...
I am not saying that ASHRAE specifies this method for chiller room ventilation.
However, I mean they don't deal with the situations on a case to case basis. The heat load from the equipment is categorized into 3 parts.
1. Machine in and driver out,
2.Machine out and driver in and
3...
That is a funny tank, in practice. (16 m height / 2m dia.) Is it horizontal or vertical?
Just go to the link below and do some trials and error.
http://www.efunda.com/formulae/fluids/draining_tank.cfm#calc
Consider 3 bar as 30 meters head approximately. 60% liquid adds about 9 meters and...
I have seen this question coming up many times in many forums. We are all right that total energy shouldn't be considered as heat load when calculating heat load of a controlled space.
For example, if we place a water cooled chiller along with motor in a controlled space, as per ASHRAE...