www . refrigerationandaircon . co . za RACA Journal I July 2024 41
Technical
• Type of air-cooled chiller : Factors such as the type of chiller – whether lubricated or magnetic bearing – play a role in design decisions .
• Limits on chilled water supply temperature : Understanding limits on chilled water supply temperature is crucial for efficient operation .
• Redundancy in Computer Room Air Handling Units ( CRAHUs ): Ensuring redundancy in CRAHUs enhances system reliability and resilience .
• Server-level agreement limits : Particularly relevant in colocation data centres , adherence to serverlevel agreement limits is vital for meeting client expectations .
• Pre-cooling limitations and outdoor pollutants : Considerations must be made to mitigate pre-cooling limitations caused by outdoor pollutants , ensuring optimal indoor air quality .
• Humidity control : Effective humidity control is essential for maintaining optimal conditions within the data centre environment .
• Provisions for liquid cooling : Incorporating provisions for liquid cooling allows for flexibility in cooling strategies , especially in high-density computing environments .
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This shift poses challenges as compliance becomes more stringent , particularly with the adoption of the Mechanical Load Component ( MLC ) table .
As Yassagh concludes the discussion , he encourages listeners to delve deeper into the column in the ASHRAE Journal for a comprehensive understanding of these considerations . The conversation wraps up with a recommendation to explore the journal ' s second lecture , leaving listeners equipped with valuable insights into air-cooled data centre design and compliance with evolving energy codes . RACA
www . refrigerationandaircon . co . za RACA Journal I July 2024 41