Cooling degree hour-based optimization of air-side free and partial free cooling strategies for mediterranean buildings: A case study.

This study presents an advanced assessment of air-based free and partial free cooling strategies to optimize energy efficiency in Mediterranean buildings, specifically in Mu˘gla, Turkey. Utilizing cooling degree hours, free cooling degree hours, and partial free cooling degree hours, the study extends conventional models by incorporating
varied comfort thresholds and outdoor climatic variations. The results reveal that a higher free cooling threshold (28 ◦C) maximizes energy savings, reaching up to 18 % during transitional seasons, whereas a lower threshold (22 ◦C) leads to increased reliance on mechanical cooling. The findings emphasize that free cooling is most effective during nighttime and transitional months, while mechanical cooling remains necessary during peak summer, with cooling degree hours peaking at 461 ◦C⋅h. An optimal partial free cooling range of 23 ◦C to 24 ◦C is identified for further efficiency improvements. This research fills a knowledge gap by offering a rigorous methodology tailored to Mediterranean climates and provides actionable insights for sustainable cooling strategies. Future studies could integrate real-time weather data and humidity effects to refine predictive models for enhanced energy efficiency.