Search for tag: "heat"

14 Media

16:03 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 22 plays 0 Optional Metadata - Department Aerospace Engineering
16:46 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 512 plays 0
23:01 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 469 plays 0 Optional Metadata - Department Faculty of Engineering
10:29 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 413 plays 0 Optional Metadata - Department Aerospace Engineering
13:28 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 459 plays 0 Optional Metadata - Department Aerospace Engineering
20:02 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 491 plays 0 Optional Metadata - Department Aerospace Engineering
16:48 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 495 plays 0 Optional Metadata - Department Aerospace Engineering
11:38 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 404 plays 0 Optional Metadata - Department Aerospace Engineering
11:14 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 472 plays 0 Optional Metadata - Department Aerospace Engineering
15:14 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 271 plays 0 Optional Metadata - Department Aerospace Engineering
10:37 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 761 plays 0 Optional Metadata - Department Aerospace Engineering
15:52 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 814 plays 0
17:25 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 866 plays 0 Optional Metadata - Department Aerospace Engineering
09:20 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