Search for tag: "thermodynamics"

Here I go through the two examples of a throttle and a heat exchanger. I look at the energy equation, and solve that. THen I look at the rate of entropy production. It is positive in both cases…

Here I describe what is hapenning in the two videos of the kid falling off the bike and the kid falling off the bike in reverse. I describe the natural order of things beign that order decreases and…

Here I show a series of irreversible processes. I discuss how in each case high quality energy is converted into lower quality energy and that this is inevitable. I introduce the concept of entropy.

Here I introduce the subject and talk about why it is both important and exciting. Enough already.

Here I introduce the course, and inform student how they should be studying. I show the week by week plan . Then I go through the syllabus and pick up some of the fundamental concepts I will be…

Here I introduce two ineffinciencies into the ideal Brayton cycle I described in the previous lecture. Firstly, the effect of friction on the turbine and compressore. Then, I look at the effect of…

Here I go through an example of a Brayton cycle. I show that, using previous knowledge of devices, we can calculte the heat and work terms for the three devices and therefore work out the efficiency…

Here I work through two examples of the effect of isentropic efficiency on devices. I use the nozzle and the compressor as examples. I show that you need to produce a system and a T-S diagram. THen…

Here I introduce an example of a power cycle. The open cycle Air, Brayton cycle. I look at the three elements and describe what happens in each one. THe I go throught a description of a rea jet…

Youtube video which I reversed.

Here I introduce an example of the Carnot cycle (open using air). I show that it forms a rectangle on the T-S diagram. I then show that this is the maximum efficiency of a heat engine cycle as: 1)…

Here I introduce the concept of the heat engine. I define the source and the sink. I then use the first and second laws of thermodynamics to derive the Carnot efficiency. I finally point out that…

Here I go through 2 examples of use of the SFEE for ideal gases. The fiart on is a turbine and the second one is an isothermal compressor. I show how to solve tese and what they mean.

Here I go through 2 examples of the first law of thermodynamics for closed systems. I use the first law Q-W=DU, the polytropic equations and the gas laws to solve them.

Here I go through a couiple of examples of use of the gas laws. On of these is to work out the mass of gas in a system. The second looks at pressure and volume changes in a fixed mass.

Here I show how it is easy to get data that is not directly on the tables by interpolating. I givre an example and show the general equations.