Heat exchangers are thermoregulatory system of an automotive air conditioning system. They are responsible for heat exchange between refrigerant and air. Sizing of the heat exchanger becomes critical to achieve the required thermal performance. In the present work, the behavior of heat exchanger with respect to change in size is studied in detail by developing a scaling model. The limited experiments have been conducted for 3 different condensers. Commercially available 1D tool GT Suite is used for simulations. The heat exchangers are modeled using COOL3D module of GT Suite. The experimental thermal capacities of heat exchanger are compared with the simulated values. A good agreement up to ±2.3% is found between the experiments and simulations. Then developed scaling model in GT Suite is used for predicting the thermal behavior of heat exchangers by changing the size of the heat exchanger. Scaled thermal capacities of each model is compared with the corresponding experimental results. The error between scaled and experimental thermal capacities of heat exchangers are within ±8.16%. The scaling model analysis would be useful to know the impact of change in refrigerant pressure on compressor work done, thermal performance of heat exchanger and COP of the system due to change in heat exchanger size.
Scaling Model of Heat Exchangers in Automotive Air Conditioning Systems
Sae Technical Papers
SAE 2016 World Congress and Exhibition ; 2016
2016-04-05
Aufsatz (Konferenz)
Englisch
Scaling model of heat exchangers in automotive air conditioning systems
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