Search for tag: "thermodynamics"

13g Example of throttle and HX

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…

From  Stephen Beck on January 20th, 2021 0 likes 0 plays 0  

11b Introduction to the second law 2

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…

From  Stephen Beck on January 19th, 2021 0 likes 1 plays 0  

11a Introduction to the second law

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.

From  Stephen Beck on January 19th, 2021 0 likes 1 plays 0  

7b Introduction to Thermodynamics

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

From  Stephen Beck on January 18th, 2021 0 likes 1 plays 0  

7a Overview of the Thermodynamics course

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…

From  Stephen Beck on January 18th, 2021 0 likes 3 plays 0  

14c Brayton cycle with inefficiencies

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…

From  Stephen Beck on January 18th, 2021 0 likes 2 plays 0  

14b Example of Brayton cycle

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…

From  Stephen Beck on January 18th, 2021 0 likes 1 plays 0  

12d Second law examples: Compressor and Nozzle

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…

From  Stephen Beck on January 14th, 2021 0 likes 0 plays 0  

14a The Brayton cycle

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…

From  Stephen Beck on January 14th, 2021 0 likes 1 plays 0  

Kid falling off bike in reverse

Youtube video which I reversed.

From  Stephen Beck on January 13th, 2021 0 likes 0 plays 0  

13c The Carnot cycle

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)…

From  Stephen Beck on January 13th, 2021 0 likes 1 plays 0  

13a Heat engines

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…

From  Stephen Beck on January 12th, 2021 0 likes 0 plays 0  

10e Open system examples

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.

From  Stephen Beck on January 11th, 2021 0 likes 0 plays 0  

10c Examples of closed systems

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.

From  Stephen Beck on January 11th, 2021 0 likes 1 plays 0  

8e Examples of gas laws

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.

From  Stephen Beck on January 7th, 2021 0 likes 0 plays 0  

8d Linear interpolation

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.

From  Stephen Beck on January 7th, 2021 0 likes 1 plays 0