Hvac System
THERMODYNAMIC ANALYSIS OF AUTOMOTIVE HVAC SYSTEM.
PRESENTED BY
Prof D.V.THAKUR 1,
1AISSMS’S POLYTECHNIC PUNE-01,
Department Of Mechanical Engineering, Pune - 01
_________________________________________________________________________ ABSTRACT
A experimental set up has been developed for refrigeration circuits of automobile air conditioning systems. The experimental set up includes a variable capacity compressor and a thermostatic expansion valve in addition to the evaporator and micro channel parallel flow condenser. An experimental bench made up of original components from the air conditioning system of a compact passenger vehicle has been developed in order to check results from the model. The refrigeration circuit was equipped with a variable capacity compressor run by an electric motor controlled by a frequency converter. Effects on system performance of such operational parameters as compressor speed return air in the evaporator and condensing air temperatures have been experimentally evaluated and compared with theoretical by means of developed model. Theoretical results deviate from the experimentally obtained within a range. Effects of the refrigerant inventory have also been experimentally evaluated with results showing no effects on system performance over a wide range of refrigerant charges.
Keywords :Micro channel, Refrigerant, Parallel flow.
____________________________________________________________________
2. INTRODUCTION
Not only do we depend on our cars to get us where we want to go, we also depend on them to get us there without discomfort. We expect the heater to keep us warm when it's cold outside, and the air conditioning system to keep us cool when it's hot. We get heat from the heater core, sort of a secondary radiator, which is part of the car’ cooling system. We get air conditioning from the car's elaborate air conditioning system. Despite its relatively small size, the cooling system has to deal with an enormous
PRESENTED BY
Prof D.V.THAKUR 1,
1AISSMS’S POLYTECHNIC PUNE-01,
Department Of Mechanical Engineering, Pune - 01
_________________________________________________________________________ ABSTRACT
A experimental set up has been developed for refrigeration circuits of automobile air conditioning systems. The experimental set up includes a variable capacity compressor and a thermostatic expansion valve in addition to the evaporator and micro channel parallel flow condenser. An experimental bench made up of original components from the air conditioning system of a compact passenger vehicle has been developed in order to check results from the model. The refrigeration circuit was equipped with a variable capacity compressor run by an electric motor controlled by a frequency converter. Effects on system performance of such operational parameters as compressor speed return air in the evaporator and condensing air temperatures have been experimentally evaluated and compared with theoretical by means of developed model. Theoretical results deviate from the experimentally obtained within a range. Effects of the refrigerant inventory have also been experimentally evaluated with results showing no effects on system performance over a wide range of refrigerant charges.
Keywords :Micro channel, Refrigerant, Parallel flow.
____________________________________________________________________
2. INTRODUCTION
Not only do we depend on our cars to get us where we want to go, we also depend on them to get us there without discomfort. We expect the heater to keep us warm when it's cold outside, and the air conditioning system to keep us cool when it's hot. We get heat from the heater core, sort of a secondary radiator, which is part of the car’ cooling system. We get air conditioning from the car's elaborate air conditioning system. Despite its relatively small size, the cooling system has to deal with an enormous