Thermodynamic Analysis of Two-Phase Ejector as Expansion Device with Dual Evaporator Temperatures on Split Type Air Conditioning Systems: An Advance Study

2021 ◽  
pp. 135-146
Author(s):  
M. E. Arsana ◽  
I. G. B. Wijaya Kusuma ◽  
M. Sucipta ◽  
I. N. Suamir
Keyword(s):  
Thermodynamic Analysis ◽  
Air Conditioning ◽  
Two Phase ◽  
Advance Study ◽  
Air Conditioning Systems

Comparison of the Straight Adiabatic Capillary Tube Expansion Devices Used in Refrigeration Systems Operating With Refrigerants R134a and R1234yf

2016 ◽  
Vol 8 (2) ◽  
Author(s):  
S. S. Harish Kruthiventi ◽  
G. Venkatarathnam
Keyword(s):  
Speed Of Sound ◽  
Air Conditioning ◽  
Phase State ◽  
Capillary Tube ◽  
Phase Speed ◽  
Refrigeration System ◽  
Two Phase ◽  
Minimum Diameter ◽  
Air Conditioning Systems ◽  
Tube Expansion

Capillary tube expansion devices are used extensively in small refrigeration and unitary air conditioning systems. R1234yf is likely to replace R134a in the next few years in many small refrigeration systems worldwide because of the new environmental regulations being proposed. In this paper, we compare the length and diameter of capillary tube required when R134a and R1234yf are used in a typical small refrigeration system. The minimum diameter of the capillary tube required has been estimated using the speed of sound of the refrigerant leaving the capillary tube in the two-phase state. The two-phase speed of sound routine developed by us can be used with both pure fluids and mixtures.

scholarly journals Thermal analysis of car air conditioning

2010 ◽  
Vol 31 (4) ◽  
pp. 71-80 ◽  
Author(s):  
Daniel Trzebiński ◽  
Ireneusz Szczygieł
Keyword(s):  
Thermal Analysis ◽  
Thermodynamic Analysis ◽  
Air Temperature ◽  
Air Conditioning ◽  
Expansion Valve ◽  
Air Cooler ◽  
Air Conditioning Systems ◽  
The Impact

Thermal analysis of car air conditioningThermodynamic analysis of car air cooler is presented in this paper. Typical refrigerator cycles are studied. The first: with uncontrolled orifice and non controlled compressor and the second one with the thermostatic controlled expansion valve and externally controlled compressor. The influence of the refrigerant decrease and the change of the air temperature which gets to exchangers on the refrigeration efficiency of the system; was analysed. Also, its effectiveness and the power required to drive the compressor were investigated. The impact of improper refrigerant charge on the performance of air conditioning systems was also checked.

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