Search for tag: "thermodynamics"

I take the first and second laws of thermodynamics and the gas laws to produce equations for the change in entropy for ideal gasses. I also show that an isentropic process is truly a polytropic one.

Based on the reversibilities and irreversibilities described above I introduce 'S' as entropy. I then show that it comes from friction and heat transfer

Here I introduce the tables of data that you'll need on this part of the course. I show the air, gas, liquids and solids tables and where they can be found in the LBoTF

Here I go through how the course works. I go through the learning outcomes and describe the flow of the course. I introduce the first and second laws and say that we will learn a lot more about them…

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 go through two examples of the first law of thermodynamics for closed systems. The first on e is a polutropic process where I calculte the final conditions and the heat and work. The second…

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 then point out that the…

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 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)…