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Journals / International Journal of Thermodynamics / 2018 / Cilt: 21 - Sayı: 2

Exergetic Investigation of a R1234yf Automotive Air Conditioning System with Internal Heat Exchanger

Mehmet Direk
Mehmet Selçuk Mert
Fikret Yüksel
Alper Keleşoğlu
Pages
103–109
Publication Date
2018-05-30
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Moreover, it was observed that the temperature rise in the air stream decreased the exergy efficiency and increased the total exergy destruction per cooling capacity.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This study presents the exergetic investigation of an automotive air conditioning (AAC) system with the refrigerant R1234yf experimentally.
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Key Findings & Data:An internal heat exchanger (IHX) has been added to the system in order to provide performance enhancement.
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Conclusion & Impact:Moreover, it was observed that the temperature rise in the air stream decreased the exergy efficiency and increased the total exergy destruction per cooling capacity.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Automobile air conditioning · exergy analysis · internal heat exchanger

Abstract

This study presents the exergetic investigation of an automotive air conditioning (AAC) system with the refrigerant R1234yf experimentally. The air-conditioning system is based on the conventional mechanical compression refrigeration cycle. An internal heat exchanger (IHX) has been added to the system in order to provide performance enhancement. The influence of the IHX investigated at different compressor speeds and air stream temperatures. Experimental measurements were collected by using a data-acquisition system, and the results were obtained by performing exergetic analysis. The exergy destruction, exergy efficiency and the total exergy destruction per cooling capacity were calculated. The analysis results were compared with a baseline system which operates with the refrigerant R134a. Furthermore, an empirical correlation was proposed for the determination of the total exergy destruction per cooling capacity for various compressor speeds for evaluating the system performance without doing further experiments. As a result, the exergetic efficiency of the system was improved by introducing IHX to the system. Moreover, it was observed that the temperature rise in the air stream decreased the exergy efficiency and increased the total exergy destruction per cooling capacity.

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Cite This Article

Direk, M., Mert, M. S., Yüksel, F., Keleşoğlu, A. (2018). Exergetic Investigation of a R1234yf Automotive Air Conditioning System with Internal Heat Exchanger. International Journal of Thermodynamics, Cilt: 21 - Sayı: 2, 103–109. https://ajindex.com/articles/673498

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