Questions tagged [vapor-pressure]

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Fully saturated liquid and vapour

In terms of fully saturated vapour and liquid for water. Why in a real world heat pump cycle for example may the water not exactly reach these saturation lines as indicated in an ideal cycle?
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3answers
90 views

Can temperature gradient keep concrete wall below 100% RH in 100% RH atmosphere?

Consider a high and wide concrete wall of say 30 cm thickness, covered with a sheet of vapor barrier on one side, and a sheet of say 30 cm thick and effective insulation on the other side. The vapor ...
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1answer
34 views

How to calculate adiabatic air temperature loss caused by increase of humidity?

I'm searching for an approach on how to calculate the adiabatic temperature loss of air when increasing its humidity by a humidifier. Assumed we have the following setup: Air measuring position 1 (...
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2answers
208 views

How does placement of a pressure gauge in a tank of fluid affect the pressure readings?

This is not a real system but rather something I made up to understand how the placement of pressure gauge in a tank takes its readings. Here’s a diagram of it- The pressure gauge placed in the ...
2
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0answers
29 views

When is the Equal Pressure Point in a Typical ICE?

My question refers to a typical bog standard normally-aspirated 4-cylinder petrol/gasoline engine. Let's say it's a 2.0 litre engine (10:1 compression ratio, firing order 1-3-4-2) operating at 2000 ...
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1answer
4k views

2 Parameter Margules derivation

I'm trying to find online the derivation for the 2 parameter margules equation but cant find it anywhere. basically need to prove $$ \frac{d}{dn1} (x_{1}x_{2}(A_{21}x_{1} + A_{12}x_{2})) = x_2^2(A_{...
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1answer
41 views

Force and Headloss Calculations for Three Stage Condenser

I am looking for some guidance on calculations for a natural condenser project. I am a Computer Engineering student, so this stuff is out of my range. The fundamental question I am trying to answer ...
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1answer
165 views

Mass Transfer from an Oxygen Bubble

I think there is an error in this questions solution and I want someone to check: Example 8.1-4:Mass transfer from an oxygen bubble A bubble of oxygen originally 0.1 cm in diameter is injected ...
3
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1answer
692 views

How do temperature and pressure influence the rate of evaporation of water in a closed vessel?

I am trying to solve a fairly simple question but I'm kind of stuck on the technicalities: Imagine that water is evaporating into initially dry air in the closed vessel shown schematically in Fig....