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 Compr
Other CO 2 Properties: High throttling losses Solid CO 2 (Dry Ice) at -80F (70 psi) Transcritical Cycle (typical) Much Higher heat transfer potential (2-3x) Temperature ‘glide’ on heat rejection HX Refrigerant-Lubricant Viscosity. 23 Vapor Compressors Classification of Vapor Compressors
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