Simulation And Analysis Of A Direct Current Operated Automotive Air-Conditioning System
The automotive air-conditioning (AAC) system is the second largest consumer of energy after the power train in a typical passenger vehicle. An improvement on the performance of this system will save a significant amount of energy and significantly improve the vehicle performance. The study was divid...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
2017
|
| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/19053/1/Simulation%20And%20Analysis%20Of%20A%20Direct%20Current%20Operated%20Automotive%20Air-Conditioning%20System.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
my-utem-ep.19053 |
|---|---|
| record_format |
uketd_dc |
| institution |
Universiti Teknikal Malaysia Melaka |
| collection |
UTeM Repository |
| language |
English |
| topic |
T Technology (General) T Technology (General) |
| spellingShingle |
T Technology (General) T Technology (General) Sukri, Mohamad Firdaus Simulation And Analysis Of A Direct Current Operated Automotive Air-Conditioning System |
| description |
The automotive air-conditioning (AAC) system is the second largest consumer of energy after the power train in a typical passenger vehicle. An improvement on the performance of this system will save a significant amount of energy and significantly improve the vehicle performance. The study was divided into two main sections, namely, experimental work and parametric simulation. The experimental work was conducted to obtain the off-road air-side evaporator heat transfer correlation and refrigerant-side correlations of compressor work, refrigerant mass flow rate, cooling capacity, and heat rejected from the condenser. The experimental rig comprised the original components from the AAC system of a medium-sized passenger car equipped with an appropriately sized electric compressor and electronic expansion valve. Cabin compartment thermal load, air-side evaporator-cabin compartment, and thermal and energy AAC system performance mathematical models had been developed based on models proposed by previous studies. Comparison exercises indicated that the simulation from the cabin compartment thermal load mathematical model and experimental results were within 5% error and were highly consistent with published results. Parametric simulation studies revealed that vehicle surface with darker color, an increment in the number of occupants, vehicle speed and fractional ventilation of air intake, and lower cabin temperature tend to increase the cooling load and require additional cooling capacity up to 144.16 W (5.01%). As a result, compressor work increased, up to 89.12 W (10.82%). Consequently, maximum reduction of COP up to 5.53% was recorded due to dominant increase in compressor work, as opposed to an increase in cooling capacity. In short, the proposed simulation model is able to help designers and/or engineers to understand the best type of vehicles and AAC operating system that can enhance the overall performance of the vehicle, particularly an electric vehicle, in the most efficient way. Consequently, it can reduce the effort, time, and cost to develop AAC systems and vehicles in the future. |
| format |
Thesis |
| qualification_name |
Doctor of Philosophy (PhD.) |
| qualification_level |
Doctorate |
| author |
Sukri, Mohamad Firdaus |
| author_facet |
Sukri, Mohamad Firdaus |
| author_sort |
Sukri, Mohamad Firdaus |
| title |
Simulation And Analysis Of A Direct Current Operated Automotive Air-Conditioning System |
| title_short |
Simulation And Analysis Of A Direct Current Operated Automotive Air-Conditioning System |
| title_full |
Simulation And Analysis Of A Direct Current Operated Automotive Air-Conditioning System |
| title_fullStr |
Simulation And Analysis Of A Direct Current Operated Automotive Air-Conditioning System |
| title_full_unstemmed |
Simulation And Analysis Of A Direct Current Operated Automotive Air-Conditioning System |
| title_sort |
simulation and analysis of a direct current operated automotive air-conditioning system |
| granting_institution |
Universiti Teknikal Malaysia Melaka |
| granting_department |
Faculty Of Mechanical Engineering |
| publishDate |
2017 |
| url |
http://eprints.utem.edu.my/id/eprint/19053/1/Simulation%20And%20Analysis%20Of%20A%20Direct%20Current%20Operated%20Automotive%20Air-Conditioning%20System.pdf |
| _version_ |
1747833960320204800 |
| spelling |
my-utem-ep.190532021-01-05T16:29:39Z Simulation And Analysis Of A Direct Current Operated Automotive Air-Conditioning System 2017 Sukri, Mohamad Firdaus T Technology (General) TL Motor vehicles. Aeronautics. Astronautics The automotive air-conditioning (AAC) system is the second largest consumer of energy after the power train in a typical passenger vehicle. An improvement on the performance of this system will save a significant amount of energy and significantly improve the vehicle performance. The study was divided into two main sections, namely, experimental work and parametric simulation. The experimental work was conducted to obtain the off-road air-side evaporator heat transfer correlation and refrigerant-side correlations of compressor work, refrigerant mass flow rate, cooling capacity, and heat rejected from the condenser. The experimental rig comprised the original components from the AAC system of a medium-sized passenger car equipped with an appropriately sized electric compressor and electronic expansion valve. Cabin compartment thermal load, air-side evaporator-cabin compartment, and thermal and energy AAC system performance mathematical models had been developed based on models proposed by previous studies. Comparison exercises indicated that the simulation from the cabin compartment thermal load mathematical model and experimental results were within 5% error and were highly consistent with published results. Parametric simulation studies revealed that vehicle surface with darker color, an increment in the number of occupants, vehicle speed and fractional ventilation of air intake, and lower cabin temperature tend to increase the cooling load and require additional cooling capacity up to 144.16 W (5.01%). As a result, compressor work increased, up to 89.12 W (10.82%). Consequently, maximum reduction of COP up to 5.53% was recorded due to dominant increase in compressor work, as opposed to an increase in cooling capacity. In short, the proposed simulation model is able to help designers and/or engineers to understand the best type of vehicles and AAC operating system that can enhance the overall performance of the vehicle, particularly an electric vehicle, in the most efficient way. Consequently, it can reduce the effort, time, and cost to develop AAC systems and vehicles in the future. 2017 Thesis http://eprints.utem.edu.my/id/eprint/19053/ http://eprints.utem.edu.my/id/eprint/19053/1/Simulation%20And%20Analysis%20Of%20A%20Direct%20Current%20Operated%20Automotive%20Air-Conditioning%20System.pdf text en public https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=102958 phd doctoral Universiti Teknikal Malaysia Melaka Faculty Of Mechanical Engineering 1. Purchase a complete DISC assessment to get a more complete and more personalized view of your DISC style at 2. https://discpersonalitytesting.com/home/get-a-disc-work-assessment/ Purchase DISC assessments for your whole team at 3. https://discpersonalitytesting.com/multiple-assessment-purchase/ 4. Work with a trained DISC coach. You can learn more about that opportunity at 5. https://discpersonalitytesting.com/home/disc-coaching/ Get even more value from your assessment with our How to Use the DISC Model video course at 6. https://discpersonalitytesting.com/home/disc-resources/how-to-use-disc/ 7. Learn insights and perspectives to close the communication gap with our Quick Course on Using the DISC Model video 8. https://discpersonalitytesting.com/home/disc-resources/disc-quick-course/ Get deeper insights into how to use the DISC Model with our Connect and Communicate 9. Video Course 10. https://discpersonalitytesting.com/home/disc-resources/using-disc-model-connectcommunicate/ 11. Get additional resources – videos, books, etc. We use this model in our book From Bud to Boss. If you are a new or aspiring leader, this book can help you grow in your leadership skills. Learn more at https://budtoboss.com/ 12. Attend a live Bud to Boss workshop we lead that uses the DISC model. Learn more at 13. https://budtoboss.com/ And, we always welcome readers at our blogs. 14. Guy’s Blog – https://recoveringengineer.com/ |