Transcription of UNIT 61: ENGINEERING THERMODYNAMICS - FREE STUDY
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UNIT 61: ENGINEERING THERMODYNAMICS - FREE STUDY
1 unit 61: ENGINEERING THERMODYNAMICS unit code: D/601/1410 QCF level: 5 Credit value: 15 OUTCOME 3 TUTORIAL No. 6 - RECIPROCATING AIR COMPRESSORS 3 Be able to evaluate the performance of reciprocating air compressors Property diagrams: theoretical pressure-volume diagrams for single and multistage compressors; actual indicator diagrams; actual, isothermal and adiabatic compression curves; induction and delivery lines; effects of clearance volume Performance characteristics: free air delivery; volumetric efficiency; actual and isothermal work done per cycle; isothermal efficiency First law of THERMODYNAMICS : input power; air power; heat transfer to intercooler and aftercooler; energy balance Faults and hazards: effects of water in compressed air; causes of compressor fires and explosions In order to complete this section you should be familiar with gas laws and polytropic gas processes.
© D.J.Dunn www.freestudy.co.uk 3 The importance of humidity to air compressors is as follows. When air is sucked into the compressor, it brings with it water vapour.
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