
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…
Optional Metadata  Department
Aerospace Engineering


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…
Optional Metadata  Department
Faculty of Engineering


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…
Optional Metadata  Department
Aerospace Engineering


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.
Optional Metadata  Department
Aerospace Engineering


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…
Optional Metadata  Department
Aerospace Engineering


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…
Optional Metadata  Department
Aerospace Engineering


Here I show that the area under the PV and TS diagrams are the work produced in a cycle. I show (again that the efficiency is the ratio between work out and heat in, but here I do it graphcally.
Optional Metadata  Department
Aerospace Engineering


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.
Optional Metadata  Department
Aerospace Engineering


I introduce heat exchangers. Then I look at the heat transfer in them from the point of the first law of Thermodynamics. I then explain the irreversibility in a heat exchanger in terms of entropy. I…
Optional Metadata  Department
Aerospace Engineering


Here I introduce isothermal processes. I then derive the specific heat capacities at constant volume and pressure. I reinforce that these can always be used to substiture for temperature. Finally I…
Optional Metadata  Department
Aerospace Engineering


Here I show that the polytropic process is a good way of describing changes in condition for closed systems with ideal gasses. I look at different values of the exponent, n. Then I calculate some at…


Here I introduce the first law of thermodynamics by thinking about the types of energy that we will deal with. I then shpow that these are interchangeable. Finally, I deduce the energy equation.
Optional Metadata  Department
Aerospace Engineering


Paul Crowther provides an overview of the planets, asteroids and comets within our Solar System, plus a sense of its scale, enhanced by stunning images from astronauts, NASA, and ESA spacecraft.
Optional Metadata  Department
Faculty of Science
Physics and Astronomy
