Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 50 6 2019 02 20 A Coupled Thermal Model for Refrigeration Cycle and Cabin of the First Produced Vehicle Based on the National Vehicle Platform A Coupled Thermal Model for Refrigeration Cycle and Cabin of the First Produced Vehicle Based on the National Vehicle Platform 1159 1174 1023 10.22060/mej.2017.12542.5372 FA M. H. Shojaeefard Automotive Engineering School, Iran University of Science and Technology,Tehran, Iran G. R. Molaeimanesh Automotive Engineering School, Iran University of Science and Technology,Tehran, Iran A. Yarmohammadi Automotive Engineering School, Iran University of Science and Technology,Tehran, Iran S. Changizian Automotive Engineering School, Iran University of Science and Technology,Tehran, Iran Journal Article 2017 02 25 Nowadays, a lot of efforts have been spent to develop effective automotive air conditioning systems due to their critical role in passengers comfort. In this study, a transient numerical thermal model has been developed for the first produced vehicle based on the national vehicle platform. At first, each component of the refrigeration cycle is modeled. In the next step, thermal loads for the vehicle’s cabin are calculated along with the solar load at every location of Iran and every hour of the day. The proposed model is used for thermal analysis of the heating, ventilation and air conditioning performance of the first produced vehicle based on the national platform. Also, for thermal analysis of the heat exchangers which are used in the model, <em>ε-NTU </em>method has been used. The proposed model can be an effective computer-aided engineering tool for analyzing the performance of automotive the heating, ventilation and air conditioning systems. Finally, the amount of 5.239 kW thermal load acting on the vehicle cabin is calculated. Also, results indicate that the proposed model can reduce the vehicle cabin temperature from 60 °C to 25 °C within 25 minutes. Nowadays, a lot of efforts have been spent to develop effective automotive air conditioning systems due to their critical role in passengers comfort. In this study, a transient numerical thermal model has been developed for the first produced vehicle based on the national vehicle platform. At first, each component of the refrigeration cycle is modeled. In the next step, thermal loads for the vehicle’s cabin are calculated along with the solar load at every location of Iran and every hour of the day. The proposed model is used for thermal analysis of the heating, ventilation and air conditioning performance of the first produced vehicle based on the national platform. Also, for thermal analysis of the heat exchangers which are used in the model, <em>ε-NTU </em>method has been used. The proposed model can be an effective computer-aided engineering tool for analyzing the performance of automotive the heating, ventilation and air conditioning systems. Finally, the amount of 5.239 kW thermal load acting on the vehicle cabin is calculated. Also, results indicate that the proposed model can reduce the vehicle cabin temperature from 60 °C to 25 °C within 25 minutes. https://mej.aut.ac.ir/article_1023_ce5140df15d046a66883807d18d0264b.pdf