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Optimizing an automotive HVAC system for enhancement of acoustic comfort Tata Motors, Limited
- Format:
- Book
- Conference/Event
- Author/Creator:
- Nagarhalli, Prasanna V., author.
- Conference Name:
- Thermal Management Systems Conference 2021 (2021-09-22 : Rajasthan, India)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2021
- Summary:
- The Indian automotive industry is going thru a rapid transformation phase. Regulatory emission norms such as, migration from BSIV to BSVI engine, increased interest in -hybrid, full electric and autonomous cars are a few examples of this rapid transformation. The improvement of internal combustion engines for compliance with the new regulatory norms (e.g. from BSIV to BSVI) has caused a significant change in the automotive acoustic field. As engines are getting quieter, the on board Heating, Ventilation and Air-Conditioning system (HVAC) system emerges as one of the prominent noise sources which strongly influences overall refinement levels inside the cabin, which in turns affects overall feeling of passenger's comfort. The HVAC system of an automobile is a compact and complex system designed to provide thermal comfort inside the car cabin. It is also a source of acoustic annoyance due to humming, hissing, chattering, air rush and refrigerant whisper noises. In particular, the study of noise propagation in the refrigeration circuit, from evaporator outlet to AC compressor inlet is significant.The current work focusses on low frequency humming noise in the refrigerant circuit and high frequency air rush noise in the air handling system. It covers various aspects of uneven refrigerant and air flows respectively. Refrigerant pressure pulsation, measured at piston pass frequency of AC compressor, propagates as an audible humming noise. High frequency air rush noise is mainly aeroacoustics in nature and is linked to blower fan and its interaction with HVAC components in the air flow path. This paper examines transfer paths and acoustic transparency responsible for emerging noises and describes optimum design solutions to control the pressure pulsations and air rush noise in the refrigerant and air flow paths respectively
- Notes:
- Vendor supplied data
- Publisher Number:
- 2021-28-0147
- Access Restriction:
- Restricted for use by site license
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