Lab 10 v2 impianto di condizionamento relazione

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Politecnico di Milano Department of Aerospace Science and Technology Aerospace Systems Course Lab No. 10 Air Conditioning System Massimo Piazza (ID Number: 847535) [email protected] Academic Year 2016/2017 Abstract Thermodynamic analysis of a simple air conditioning system employed in an aircraft. This report will dwell on identifying temperature and mass flow rate values throughout the system. Two different environmental conditions will be considered, both with the aircraft operating on the ground. Contents 1 Introduction 1 2 Nomenclature and Problem Data 2 3 Analysis of the Problem 3 3.1 Problem Description and Solving Method . . . . . . . . . . . . . . . . . . . . 3 3.1.1 Reverse Joule Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.2 Development of Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2.1 Case 1 (t1 = 10 ◦C, t 6 = 25 ◦C) . . . . . . . . . . . . . . . . . . . . . 5 3.2.2 Case 2 (t1 = 30 ◦C, t 6 = 20 ◦C) . . . . . . . . . . . . . . . . . . . . . 6 3.3 Presentation of Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.3.1 Case 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.3.2 Case 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Findings 8 i 1 Introduction DIPARTIMENTO DI SCIENZE E TECNOLOGIE AEROSPAZIALI IMPIANTI E SISTEMI AEROSPAZIALI Laboratorio n.10 – A.A. 2016/2017 IMPIANTO DI CONDIZIONAMENTO Dati : 2m = 300 kg/h p1 = 101325 Pa p2/p1 = 3.2 p3 = .95 p2 p4 = p5 = p6 = p1 p7 =.95 p1 T4 = 4 °C calcolare per i due casi di temperatura al punto 1 di 10°C e di 30°C: x la ripartizione di portata richiesta fra il ramo “caldo” ( 5m) ed il ramo “freddo” (4m) per avere nel punto 6 la temperatura di 20 °C quando quella esterna è…