Search for tag: "efficiency"

10 Media

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 680 plays 0 Optional Metadata - Department Faculty of 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 721 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 753 plays 0 Optional Metadata - Department Aerospace Engineering
12d Second law examples: Compressor and Nozzle duration 19 minutes 1 second 12d Second law examples: Compressor and Nozzle 12d Second law examples: Compressor and Nozzle	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… thermodynamics isentropic efficiency nozzle compressor examples sfee From Stephen Beck 0 likes 957 plays 0 Optional Metadata - Department Aerospace Engineering
14a The Brayton cycle duration 16 minutes 13 seconds 14a The Brayton cycle 14a The Brayton cycle	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… thermodynamics brayton cycle compressor combustor turbine efficiency jet engine From Stephen Beck 0 likes 681 plays 0 Optional Metadata - Department Aerospace Engineering
13c The Carnot cycle duration 16 minutes 41 seconds 13c The Carnot cycle 13c The Carnot cycle	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)… thermodynamics carnot cycle t-s diagram efficiency From Stephen Beck 0 likes 589 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 603 plays 0 Optional Metadata - Department Aerospace Engineering
11c Efficiencies and the T-s diagram duration 11 minutes 40 seconds 11c Efficiencies and the T-s diagram 11c Efficiencies and the T-s diagram	11c Efficiencies and the T-s diagram Here I introduce the concept of efficiency. I show how these can be shown on a T-s diagram. THis gives the isentropic efficiency. thermofluids thermodynamics isentropic efficiency t-s diagram efficiency entropy From Stephen Beck 0 likes 152 plays 0 Optional Metadata - Department Aerospace Engineering
11c Second law processes and the T-s diagram duration 11 minutes 31 seconds 11c Second law processes and the T-s diagram 11c Second law processes and the T-s diagram	11c Second law processes and the T-s diagram Here I introduce the T-s diagram for ideal gasses. I show that an isentropic expansion is a vertical upward line on this and an isentropic compression is a vertical downward line. I then show that in… entropy second law isentropic efficiency t-s diagram From Stephen Beck 0 likes 1,237 plays 0 Optional Metadata - Department Aerospace Engineering
12e Throttle valves, enthalpy and entropy duration 12 minutes 39 seconds 12e Throttle valves, enthalpy and entropy 12e Throttle valves, enthalpy and entropy	12e Throttle valves, enthalpy and entropy We look at the throttle valve,, which is a constant enthalpy device. We see that it reduces pressure and increases the entropy of the flow. THen we compare the throttle to a turbine to get a better… throttle entropy enthalpy turbine efficiency From Stephen Beck 0 likes 1,028 plays 0