How Voltas Made Quiet and Efficient Cooling Possible for Academic Buildings at IIT Chennai
The Indian Institute of Technology Madras (IIT Madras) is one of India’s leading academic institutions, known for its expansive campus that integrates academic blocks, research facilities, and residential areas. The campus environment needs infrastructure that functions efficiently without disturbing its learning and living spaces.
As part of its infrastructure development, IIT Madras needed a centralised chilled air conditioning system for its academic buildings. This case study outlines how Voltas solved a key challenge in the project, maintaining strict noise limits and delivering consistent cooling performance.
Client: Indian Institute of Technology (IIT) Madras
Location: Chennai
Segment: Central Government Institute
Solution Category: Centralised Cooling – Air-Cooled Screw Chillers
Products Supplied: Voltas Air-Cooled Screw Chillers with Acoustic Enclosure
Total Installed Capacity: 600 TR
Cooling Needs in an Academic Campus
Academic campuses operate differently from commercial or industrial spaces. Cooling systems must maintain comfortable indoor conditions across classrooms, lecture halls, and research spaces throughout the day.
At IIT Madras, the requirement extended beyond temperature control. The proximity of academic buildings to residential areas meant that cooling systems needed to operate without creating noise disturbances.
The objective was to maintain a balance between performance and environmental comfort across the campus.
The Challenge of Noise That Defined the Project
A key requirement for this project was the strict noise limit set at 70 dB at 1 metre. This specification applies to both compressors and fans within the air-cooled screw chiller system.
Meeting this requirement posed a technical challenge. Air-cooled chillers typically generate noise due to compressor operation and airflow through fans. Reducing noise levels without affecting cooling capacity or airflow required a carefully planned solution.
The challenge was to achieve compliance with the noise limit and ensure that system performance is consistent.
Approach to Low-Noise Cooling Design
Voltas solved this problem by focusing on acoustic engineering within the cooling system design. The approach was structured to reduce noise levels and maintain system efficiency.
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Acoustic-focused system designs
The chiller setup was modified to address sound generation at key components.
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Enclosure-based noise control
Special acoustic enclosures were designed for compressors and surrounding components.
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Maintaining airflow and capacity
The system design ensured that noise reduction measures did not restrict air movement.
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Balancing performance and compliance
Cooling output was maintained and achieved the required noise levels.
This approach ensured that the system met both operational and environmental requirements.
Solution Delivered: Air-Cooled Screw Chillers with Acoustic Enclosure
Voltas supplied air-cooled screw chillers equipped with specially designed acoustic enclosures to meet the project specifications.
- 120 TR × 5 units
- Total installed capacity: 600 TR
The acoustic enclosure was designed to cover the compressor, its surrounding components, and fan systems. This reduced the noise and didn’t impact the system performance as well.
The configuration allowed the chillers to operate within the specified noise limits. The system maintained proper air circulation, which is essential for efficient operation in air-cooled systems.
Testing and Validation Under Real Conditions
To verify performance, noise level testing was conducted under controlled conditions. The system was tested to ensure compliance with the specified limit of 70 dB at 1 metre.
Customer validation was carried out at the factory, where the equipment was tested in the presence of stakeholders. Special arrangements were made to conduct the testing, including controlled shutdowns for accurate measurement.
The results confirmed that the system met the required noise levels without compromising cooling performance.
Impact on Campus Operations
This cooling system made IIT Madras a comfortable space for the students and ensured no disturbances.
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Controlled noise levels
Ensured that cooling systems operated within specified limits.
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Consistent cooling performance
Maintained stable indoor conditions across classrooms and labs.
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Improved campus environment
Reduced disturbance in both academic and residential areas.
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Reliable system operation
Delivered steady performance during daily usage.
This system ensured even cooling across the whole campus without any interference.
What Made This Project Stand Out?
This project was defined by its focus on solving a specific constraint without affecting overall performance.
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Meeting strict noise specifications
The system complied with defined acoustic limits.
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Maintaining system efficiency
Cooling capacity and airflow were not compromised.
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Engineering-led solution design
Acoustic enclosures were integrated without altering system functionality.
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Validation through testing
Performance was confirmed through structured testing and customer validation.
Summary
This project shows how specific environmental requirements can shape cooling system design in academic spaces. Keeping the noise of these commercial ACs under control, Voltas was able to deliver consistent cooling without any hassle. The implementation reflects how careful planning and testing can ensure that both performance and compliance are achieved in a campus setting.