A Carnot cycle, isentropic, isobaric, and adiabatic processes cannot occur in real systems either and yet every thermo book will make 'unrealistic' assumptions like this all the time during a fundamental exercise.
From my perspective this is clearly a fundamental exercise and the emphasis is...
In a real heat pipe, yes you are correct. There are local hot spots along with changes in capillary pressure etc. etc.
However, the problem the OP asked about said assume constant temperature as quoted above. It appears this is just a thermodynamic exercise to practice finding the...
Bingo.
If the entire process (from top to bottom) is two-phase, the fluid is at a constant temperature and pressure. They give you the temperature so...
I do have experience with this and my recommendation is to not use EES for this. I do compressor modeling and have attempted to implement a simple compressor model using EES at one point with only limited success.
To do what you are asking you will need to tell EES an order to solve things...
kbka,
Are you assuming dry air in the cylinder (i.e. neglecting evaporation)?
Are you attempting to find a method to get closer to isothermal compression?
The video described it as 'cyclical' which I interpreted to be close to sinusoidal, which I think could be close based on what I saw in the video. Never claimed it was not a very rough estimation.
Makes sense.
Measuring human output seems difficult because of fatigue. Take this guy for example,
squatting 1050lbf. I did another rough estimation of power output assuming he only moved the weight about 2ft in 1 second, and ignoring the down-stroke. This yields...
In the video they claim that the tension on the cable between the strongman and the truck oscillated between 100lbf and 500lbf continuously, based on the data from the load cell. If you assume that is correct and the average tension was around 300lbf, this yields about...
Some great thermo books:
Cengel and Boles, Thermodynamics: An Engineering Approach. McGraw-Hill
Moran and Shapiro, Fundamentals of Engineering Thermodynamics. Wiley
Fluids:
Fox, McDonald, and Pritchard. Introduction to Fluid Mechanics. Wiley
F.M. White. Viscous Fluid Flow. McGraw Hill
Panton...
This is an worthwhile discussion and one that I am positive thermal engineers at electronics companies have had at one time or another.
It all boils down to flow rate vs. pressure drop. It is a tradeoff, and not as straightforward as you might expect.
One big assumption made by the OP is...
In an ideal cycle you have a sub-cooled liquid at this point (i.e. not two phase). In reality, you may have some quality here depending on the environmental conditions, heat load, and other variables.
The purpose of this cycle is to pump heat from a cold zone to a hot zone. Since heat only...
Are you looking for maximum economic savings or maximum overall efficiency?
What is the overall heat requirement at the winter ASHRAE design conditions?
What is the performance of components you are comparing?
What are the prices of the components you are comparing?
Would the financing be...
For symbolic integration and differentiation look into the functions 'int' and 'diff'.
To do this numerically, look into 'trapz' or 'quad' to integrate. Numerical differentiation is simply:
\frac{\Delta x}{\Delta y} = \frac{x_{i+1} - x_{i}}{y_{i+1} - y{i}}