← All glossary terms

Utility Rates, Grid, and Markets

Resource adequacy

Resource adequacy is the ability of the power system to have enough supply, imports, demand response, and reserves to meet expected demand plus reliability margins. AI load growth has made resource adequacy a core large-load planning issue.

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Approach temperature

Approach temperature is the difference between leaving fluid temperature and the relevant ambient or cooling medium temperature. It helps describe cooling tower, heat exchanger, and chiller performance but needs equipment-specific context.

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Building permit

Building permit is local authorization to construct, alter, or occupy structures under building code review. For data centers, building permit packages must coordinate architecture, structural, electrical, mechanical, fire protection, and equipment loads.

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Water-side economizer

Water-side economization uses outside conditions to cool water or fluid without bringing outdoor air directly into the data hall. It can reduce chiller compressor energy while maintaining tighter indoor air control.

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