Transcription of P-h Chart for R134a (SI Units) - Syracuse University
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P-h Chart for R134a (SI Units) - Syracuse University
1 Principles of RefrigerationMAE 554 Professor H. Ezzat KhalifaSyracuse UniversityP-h Chart for R134a (SI Units) 2 Psychrometric Chart (ASHRAE)Psychrometric ProcessesCoolHeatHumidifyDehumidifyCool & DehumidifyAir Conditioning Systems Cool & Dehumidify Air3A/C System Psychrometric ProcessesRoom Condition LineCoil temperature must be cooler than room dew point (DP) to dehumidify the airCoil InletRoom Return AirOutdoor AirRoom DPCoil ExitReversed Carnot Temperature - TC, Cycle PerformanceSat Cond T, CReversed Carnot Vapor Compression CyclesTTCTH5 Reversed Rankine Vapor Compression CyclesTTCTHS uperheat HornIncreased WorkIdeal Practical Vapor Compression CyclesTTCTHS uperheat HornIncreased WorkThrottling Lossin RefrigerationThrottling LossIn Work61324 Simple Vapor Compression CycleSingle-Stage Vapor Compression Cycle hW hEhPPEPC TSC hWo TSH7 Ideal VCC Performance Sat. Temp., CCOPC0510152025 Capacity, QCond. Sat. Temp., CR22 Ideal VCC10 CFM CompressorComparison of Ideal VCC with Carnot Sat.
Positive Displacement Compressors Piston (Reciprocating) 26 Comparison of P-V Diagrams Pressure Scroll/Screw (AC & Refrig.) Volume Displacement Clearance Volume Recip. AC Recip. Refrig. Up to 60% More Capacity Piston Compressor Volumetric Efficiency 0.0 0.2 0.4 0.6 0.8 1.0 0 10 2030 4050 60 Pressure Ratio Theoretical Volumeteric Efficiency 0 ...
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