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<p>Accelerating global climate change and surging building energy use have intensified the conflict between indoor thermal comfort and energy-saving mandates, particularly within university campuses in hot-dry urban environments. Addressing this requires urgent, scientifically-grounded urban climate mitigation and adaptation strategies. This study takes Shihezi University in Xinjiang, China, as a representative case to investigate indoor thermal environment characteristics and climate-responsive improvement strategies. By integrating field measurements with numerical simulations, we examine the impacts of building orientation, floor level, air-conditioning operation, and occupant activity on the indoor thermal environment, evaluating thermal comfort through the PMV-PPD model. Results reveal pronounced vertical microclimate gradients, with significant temperature and humidity disparities between ground and top floors. While air-conditioning effectively lowers temperatures, it exacerbates the “dry-hot” indoor tension and elevates energy-related carbon footprints. Occupant activities further strain the indoor thermal balance. To enhance urban climate resilience, an optimization strategy employing adjustable external shading devices is proposed. Simulation validation demonstrates that this passive adaptation measure reduces the indoor mean temperature by 1.96&#xa0;°C and the Predicted Mean Vote (PMV) index by 0.52. This study provides quantitative evidence and a technical pathway for mitigating urban heat impacts in university buildings, underscoring the necessity of coupling passive design with active control to achieve sustainable urban climate adaptation.</p>

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Quantitative assessment of indoor thermal environment and adaptive renovation strategies in universities of hot-dry regions

  • 期刊论文

  • 发表日期：

    2026年6月30日

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  • D. Wang,
  • J. Li,
  • J. Sun,
  • S. Li,
  • Y. Yang,
  • J. Li,
  • X. Li,
  • Y. Su

摘要

Accelerating global climate change and surging building energy use have intensified the conflict between indoor thermal comfort and energy-saving mandates, particularly within university campuses in hot-dry urban environments. Addressing this requires urgent, scientifically-grounded urban climate mitigation and adaptation strategies. This study takes Shihezi University in Xinjiang, China, as a representative case to investigate indoor thermal environment characteristics and climate-responsive improvement strategies. By integrating field measurements with numerical simulations, we examine the impacts of building orientation, floor level, air-conditioning operation, and occupant activity on the indoor thermal environment, evaluating thermal comfort through the PMV-PPD model. Results reveal pronounced vertical microclimate gradients, with significant temperature and humidity disparities between ground and top floors. While air-conditioning effectively lowers temperatures, it exacerbates the “dry-hot” indoor tension and elevates energy-related carbon footprints. Occupant activities further strain the indoor thermal balance. To enhance urban climate resilience, an optimization strategy employing adjustable external shading devices is proposed. Simulation validation demonstrates that this passive adaptation measure reduces the indoor mean temperature by 1.96 °C and the Predicted Mean Vote (PMV) index by 0.52. This study provides quantitative evidence and a technical pathway for mitigating urban heat impacts in university buildings, underscoring the necessity of coupling passive design with active control to achieve sustainable urban climate adaptation.