Thanks. That makes sense.
Any idea how much pressure a glued cpvc joint will stand?
I know the piping itself is rated to 400 psi (2" sch 80) and I suspect if I use a longer setting glue it will only take it down to around 200. My instrument flanges are rated for 150, so that's probably my limit.
I have two streams at controlled flow rates that will mix via an inline static mixer. Both streams will have check valves before the mixer, however, do I have to worry about fighting pressures in this situation? If the one stream is 40 psi and the other is only 20 psi, will the 20 psi line...
The ∆H is always assumed to be constant with temp in this equation (standard enthalpy change), which is an obvious downside to the relation. If you derive it from
(d ln(K)) / (d 1/T) = -∆Ho/R you will find that from the integration.
This is just a study of density, which is a property of a substance. The density is how much mass for a given volume, thus having units of grams per milliliter (g/mL = g/cm^3). At the same temperature and pressure this property is always constant provided the substance is chemically the same...
If you graph two functions, y=x^2 and y=5x^2 you will notice the first graph appears "fatter" and the second graph is "skinnier".
As you increase the coefficient a the more narrow the graph becomes.
As you decrease the coefficient a the wider the graph becomes.
I would experiment with this...
Yeah, I was just messing.
So in general power (P) is similar to energy (E) the same way velocity (V) is similar to displacement (x). The derivative of energy with respect to time is equal to power.
dE/dt = P vs. dx/dt = Vx
I don't believe the internal energy of the liquid would change if you cut the gas in half. Maybe if the container was pressurized and by removing that amount of gas you altered the pressure and as a result changed the liquid's energy, but I'm not so sure otherwise. Ask yourself why we calculate...
You should really check the salary statistics for ME's vs. CE's before you switch. ME's make a lot more and are rarely required to take the FE as well as PE exams like 99% of civils are required to do.
The first problem you would have is separating the water and ammonia that didn't react from your desired products. I can't think of any way to do that which wouldn't encourage them to react back to water and ammonia (i.e. time, mixing).
Nitrogen prefers 3 bonds and oxygen 2. Therefore, the...
Havn't studied your jpeg but if your equations are all linear then you should only need the 6 equations with the 6 unknowns. You might be over-specifying. If you think it's an algebraic mistake maybe you could try solving via matrix (6x6^-1 * 6x1)?
The most reliable way would be to drill a tiny hole in the piping (PVC?) on the up side (away from the direction of gravity) and somehow tape a bag over top of the hole. The bag should inflate when there's flow. You could also just put a tire pressure gauge into the hole. Change in pressure...
There is a ton of chemistry in petroleum engineering. You're looking at probably 6 courses in chemistry (minimum!) which would be 2 general chemistry, 2 organic chemistry, and another two physical chemistry courses. In addition the university that offers the degree will likely want you to take...
Have you considered matlab? It's almost the same as c++. In college I knew a lot of electrical engineers on computer tracks who used matlab extensively. In general, Java seems to be more for web designers, and is easy to pick up anyway.
If you're good with code then once you become fluent in...
Hi Peter,
It is true that all power plants generally run better in the winter than in the summer. I've experienced this myself working at a nuclear power plant.
You're on the right track but it looks like you just misinterpreted the Carnot equation. When Tc decreases then the Carnot efficiency...
But there's one equation and 2 unknowns. So the duty the air supplies, Q = water flow*Cp*(T1-T2). We don't have T2 and mass flow of water. We need to take a different path. We have to use the 3% loss in water mass that leaves the tower as steam.
Unless you're very familiar with the professor then you should address him formally. Use "Dr. Newman" as his name. Always assume they have a PhD and address as "Dr. Last Name" unless they have their masters, in which case "Professor Last Name" is sufficient. Some PhD's will be ok with with...
'Advanced engineering mathematics' by Kreyszig (9780470084847) is pretty good. ODEs, linear algebra, PDEs, complex analysis, numeric analysis software, optimization / graphs, probability / statistics. I used it in my graduate engineering math course.
The contractor or aka compressor's job is to compress the fluid. So while it is adiabatic, there is still work being used by the compressor to rotate its gears and vanes and in the process the pressure of the fluid is increased and the specific volume is decreased. If the energy enters the fluid...
Peter,
Everything looks good! I got the same numbers.
The only part I disagree with is in the last part for "(b) the number of molecules in 1 kg of the gas"
In 1 kg of CO2 you will have a gigantic amount of molecules. Have you ever used a constant in class called Avogodro's Constant, NA...
Are you given any equations, the viscosity, or the piping material?
To solve this I would assume a roughness factor for the piping (e=0.00015 ft is good) and calculate the reynolds number, then the fraction factor, then head loss, and then finally a pressure drop.
Unless the problem...
It sounds like you're looking for the overall heat transfer coefficient, U. This value is always given from the vendor in the TEMA sheet for the heat exchanger (HX). The TEMA sheet has all of the data you would ever need to do any type of analysis.
A heuristic value for U is 0.8517 kJ/m2-K-s...
See my attached picture for the Taylor series equation. For Taylor series all you have to do is substitue your given value (zo = 0) into the original function, the second derivative of the function, the third derivative... and multiply that result by (z-zo)n/n! and so on until you obtain 3 terms...
Hello!
You have to convert these from mole fraction to mass fraction, right?
The conversion is wi=XiMi / ΣXiMi
X = mole frac., w = mass frac., M = molar mass.
Leave M for the inerts unknown. You need another equation to solve for the inert's molar mass or cancel it out.
Hint: the...
You have error bars so I'm guessing you know the error for each point. You can make a seperate column on excel, add or subtract the error from each point (new point = old point + 0.05... for example), and then add this data set to the graph. That should be your error curve.