What is the chemical exergy of humid air relative to water?

More Steffen Schmid's questions See All

Different values by sweeping variables at the parametric table of EES and by running them singularly at the main command window?

Sometimes when I run parametric table of EES (sweep a variable) I have get unstable answer at some rages. For example for 0, 1, 2, 3 I get 10, 0.005, 9.5, 0.00000014 But when I don't use...

02 March 2019 1,625 6 View

Can I find any simulation about MVR desalination in papers?

Dear all, Can I find any simulation about MVR Evaporator desalination in papers or books like the following process? http://img.shbenyou.com/2014/05/1399392716Vo5Pdd.jpg Thanks

10 November 2018 378 2 View

Why does scaling occur at boiling?

Dear all, Why does scaling occur at boiling? (can we say that the maximum concentration increase at surface at boiling so scaling occurs?) If boiling does not occur, Does we have scaling at the...

10 November 2018 9,205 6 View

When does scaling occur?

Hello, I want to know how can I find and calculate at what condition scaling occur? For example if I have a water that contain 25000 ppm Ca2+ and 500 ppm SO42-, does scaling occur at the surface...

10 November 2018 9,090 0 View

What is the best way to desalinate very high saline water?

Dear all researchers, What is the best way to desalinate very high saline water (up to +180000 ppm) for the purpose of ZLD? Can we use MED, MSF or TVC? (I know the scaling formation, but is...

10 November 2018 1,091 3 View

When we calculate flashing process with mass and energy balance and when we calculate it with "non equilibrium allowance"(NEA)?

Hi all Sometimes the flashing process are calculated with mass and balance equations like the following...

09 October 2018 7,184 1 View

What is the physical meaning of "non-equilibrium allowance"(NEA)?

Hi What is the physical meaning of "non-equilibrium allowance"(NEA) in water desalination? thanks

09 October 2018 4,947 2 View

Which reference is perfect to read about flashing process?

Dear all Which book has detailed explanations about flashing process? Thanks

09 October 2018 228 17 View

Does an EES program can be used as a function of a MATLAB program?

Dear all researchers, I want to know that if I have an EES program, can i use it as a function of a MATLAB program? Thanks,

06 July 2018 8,115 7 View

Which software is good for simulation of power plants & desalination systems?

Hi I want to know that which software is good to simulate all kinds of power plants & desalination systems? I want a very flexible software to simulate novel systems that are not common some...

04 May 2018 8,598 6 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View

Should we reduce the standard unit of length to 0.31951540592 meter ?

The reasoning behind this question is to align the ratios of the proton potential in energy per charge to the speed of light in distance per time. As these two dimensions appear to be related,...

27 February 2021 947 7 View

How do you mesh a thin solid in Fluent?

Hello, I have used the shell function on SpaceClaim to create thin solids for the model I am studying. These are contained within an enclosure for my study. I chose this approach as it avoids the...

24 February 2021 8,856 3 View

No streamlines present in a small region inside a flow. This means exactly what?

No streamlines present means whether the flow is getting obstructed there and the velocity inside the region is zero? Or else, the fluid is trapped inside that region with a nonzero velocity?...

22 February 2021 5,249 10 View

How to solve the fatal error "the entire source was rejected" in MCNP?

Simple geometry was made having concentric cylinders bounded by a square region. The geometry has a reflective boundary. The source was defined at one point in the boundary and when it had been...

17 February 2021 4,364 3 View

How complex systems physics/statistical mechanics would be helpful for particle physics & Networking?

Recently, I've been selected for an ICTP program named Physics of Complex Systems. But, I have a keen interest in Particle Physics & Quantum networks. As statistical mechanics involved in...

11 February 2021 699 3 View

Applications of General Multiple Sums?

Does anyone know of applications of multiple sums of a sequence? I know of the Multiple Zeta values (which is a multiple sum of 1/N^s). This has multiple applications in quantum physics, QED,...

08 February 2021 8,047 12 View

Hayder Jaffal

Dear Steffen

See my thesis which includes details about what you want.

https://www.researchgate.net/publication/311923173_An_Energy_and_Exergy_Analysis_on_the_Performance_of_Wet_Cooling_Tower_in_Iraq

Steffen Schmid

Thanks,

You used a method that is exists in Bejan's book.

I want more general definition and I don't want any simplification like idea gas assumption.

I attached what is in my mind but I think something is wrong with it....

Does anyone has an idea?

I consider water at 25C and 1atm as dead state

Should I define several dead state conditions for multi-component systems? In that case, can I do thermo-economic analysis?