HVAC System Partners（空调系统合作伙伴）.pptVIP

HVAC System Design Refrigeration Cycle Design Parameters Considerations Heat Load on the HVAC = 5.287 kW Cabin Relative Humidity = 40% Evaporator Temperature = 4°C Refrigerant Used = R134a Refrigeration Cycle : Vapour Compression Cycle Analysis Heat Load Assumptions: Compression process is isentropic. No pressure losses in piping. Condenser temperature = 46°C. Evaporator Temperature = 4° C. Refrigerant is not sub cooled. Results Evaporator Pressure = 3.38 bar Condenser Pressure = 11.9 bar Heat Load = 5.287 KW Condenser Cooling Load= 6.308 KW Compressor Work = 1.02 KW Mass Flow Rate = 1.94 l/min Selection Basis Scroll Compressors – Compact design and High Volumetric Efficiency ( around 98% ). Refrigerant R134a – Minimized environmental impact. Plate-Fin Heat Exchanger- Compact size, Higher heat transfer capability. Simple design incorporated to minimize cost. Looking Ahead Finalize and validate results based on inputs from other teams. Improvise on the current design and form a cost effective solution. Documentation and reports. Thank You ! * PES Institute of Technology Objective Goal: To develop an automotive air-conditioning system that is smaller and lighter than with conventional technology. The Challenge: The system must be capable of keeping a temperature of 22?C inside a stationary black vehicle with four occupants, with an outside temperature of 40?C. Also, the system must be an efficient heating system, keeping an internal temperature of 15?C with an outside temperature of 0?C. H.V.A.C H.V.A.C – Heating, Ventilation and Air Conditioning system The HVAC regulates: Room Temperature Humidity Air Quality Air Flow 4 1 2 3 Enthalpy kJ/kg Vapour Compression Cycle Cabin design – cooling and heating requirements Temperature and Humidity range Placement of Vents and Ducts Space considerations Effect on car performance Efficiency Environmental Impact Heat Load C