# Search for tag: "first law"

#### 12g 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 April 15th, 2021 0 likes 20 plays 0

#### 10c Closed system examples

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…

From  Stephen Beck on March 2nd, 2021 0 likes 97 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 then point out that the…

From  Stephen Beck on February 4th, 2021 0 likes 107 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 194 plays 0

#### 12f Heat exchangers

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…

From  Stephen Beck on December 11th, 2019 0 likes 252 plays 0

#### 10d Open Systems and the SFEE

Here I derive the steady flow energy equation for thermal systems. I show how it can be used for calculating the work in an adiabatic process using the gas laws.

From  Stephen Beck on July 4th, 2019 0 likes 261 plays 0

#### 10b Polytropic processes

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…

From  Stephen Beck on July 4th, 2019 0 likes 324 plays 0

#### 9a The energy equation

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.

From  Stephen Beck on July 3rd, 2019 0 likes 412 plays 0

#### 9b Four equations from one

Here I derive the four forms of the energy equation that we will use to solve different types of problem on this course. These are 1)For Closed Systems 2)For Steady Flow Thermal Systems 3)For…

From  Stephen Beck on October 4th, 2018 0 likes 627 plays 0