Search for tag: "heat"

14 Media

12g Example of throttle and HX duration 16 minutes 3 seconds 12g Example of throttle and HX 12g Example of throttle and HX	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… thermodynamics heat exchangers irreversibility first law second law From Stephen Beck 0 likes 106 plays 0 Optional Metadata - Department Aerospace Engineering
10c Closed system examples duration 16 minutes 46 seconds 10c Closed system examples 10c Closed system examples	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… first law of thermodynamics thermodynamics heat work polytropic processes closed system. From Stephen Beck 0 likes 727 plays 0
13a Heat engines duration 23 minutes 1 second 13a Heat engines 13a Heat engines	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… thermodynamics first law second law heat engine heat work carnot efficiency From Stephen Beck 0 likes 522 plays 0 Optional Metadata - Department Faculty of Engineering
11b Introduction to the second law 2 duration 10 minutes 29 seconds 11b Introduction to the second law 2 11b Introduction to the second law 2	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… thermodynamics heat work reversibility irreversibility second law entropy From Stephen Beck 0 likes 547 plays 0 Optional Metadata - Department Aerospace Engineering
11a Introduction to the second law duration 13 minutes 28 seconds 11a Introduction to the second law 11a Introduction to the second law	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. thermodynamics heat work second law entropy reversibility irreversibility From Stephen Beck 0 likes 591 plays 0 Optional Metadata - Department Aerospace Engineering
14c Brayton cycle with inefficiencies duration 20 minutes 2 seconds 14c Brayton cycle with inefficiencies 14c Brayton cycle with inefficiencies	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… thermodynamics brayton cycle efficiency pressure drop heat work From Stephen Beck 0 likes 525 plays 0 Optional Metadata - Department Aerospace Engineering
14b Example of Brayton cycle duration 16 minutes 48 seconds 14b Example of Brayton cycle 14b Example of Brayton cycle	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… thermodynamics brayton cycle heat work efficiency ideal isentropic From Stephen Beck 0 likes 546 plays 0 Optional Metadata - Department Aerospace Engineering
13b Power cycles and diagrams duration 11 minutes 38 seconds 13b Power cycles and diagrams 13b Power cycles and diagrams	13b Power cycles and diagrams 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. themodynamics carnot cycle t-s diagram p-v diagram heat engine efficiency From Stephen Beck 0 likes 450 plays 0 Optional Metadata - Department Aerospace Engineering
10e Open system examples duration 11 minutes 14 seconds 10e Open system examples 10e Open system examples	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. thermodynamics open systems heat work sfee isothermal turbine compressor From Stephen Beck 0 likes 655 plays 0 Optional Metadata - Department Aerospace Engineering
12f Heat exchangers duration 15 minutes 14 seconds 12f Heat exchangers 12f Heat exchangers	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… first law heat exchangers entropy From Stephen Beck 0 likes 273 plays 0 Optional Metadata - Department Aerospace Engineering
9c Specific Heat Capacities duration 10 minutes 37 seconds 9c Specific Heat Capacities 9c Specific Heat Capacities	9c Specific Heat Capacities 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… gas laws specific heat capacity temperature From Stephen Beck 0 likes 941 plays 0 Optional Metadata - Department Aerospace Engineering
10b Polytropic processes duration 15 minutes 52 seconds 10b Polytropic processes 10b Polytropic processes	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… polytropic processes first law ideal gas heat wor From Stephen Beck 0 likes 1,042 plays 0
9a The energy equation duration 17 minutes 25 seconds 9a The energy equation 9a The energy equation	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. types of energy heat work first law themodynamics From Stephen Beck 0 likes 1,054 plays 0 Optional Metadata - Department Aerospace Engineering
The Solar System duration 9 minutes 20 seconds The Solar System The Solar System	The Solar System 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. atmosphere smaller planets image kilometers concepts in physics comet surface spacecraft weather astronautics uranus earth astronaut geography mercury heat transfer astronomy fluid dynamics closest system daytime thermodynamics asteroid kinematics mars gas giant planets terrestrial planets post-transition metals festival of the mind planetary science eccentric largest pluto reflecting pressure vessels effects station saturn classical mechanics topology geography terminology spaceflight meteorology neptune orbit planet public engagement neighbor jupiter venus minutes From Tom Foster 0 likes 121 plays 0 Optional Metadata - Department Faculty of Science Physics and Astronomy