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Transient analysis and thermal design of a solar-powered cooling system for an office building: Enhancements using phase change materials and zeotropic mixtures in ejector refrigeration cycle

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  • Afzal, Sadegh
  • M. Ziapour, Behrooz

Abstract

This study explores an innovative integration of solar energy with thermal energy storage for power production and cooling system support, utilizing phase change materials (PCMs) to enhance solar system performance, particularly for the cooling demands of an office building. The cooling load of a target office building in Ardabil City, Iran, is calculated for a typical day. Optimization is conducted using Multi-Objective Particle Swarm Optimization (MOPSO) to select the optimal zeotropic mixture as the working fluid, aimed at maximizing efficiency and minimizing heat source requirements. The system is designed to meet the needs of a two-story office building. Analysis of photovoltaic modules integrated with PCM under various parameters led to the selection of 25 PVT-PCM units in a series. The total setup includes 730 modules covering 365 m2, achieving a mass flow rate of 2.92 kg/s and supporting a 40 kW cooling load in the Ejector Refrigeration Cycle (ERC). The development of this solar-powered cooling system presents a sustainable, economically viable solution for building cooling. It demonstrates significant advancements in thermal efficiency through the strategic use of PCMs and optimized zeotropic mixtures in ejector refrigeration cycles. The system's scalable design offers a model for adapting to diverse climatic conditions, marking a notable contribution to sustainable building technologies.

Suggested Citation

  • Afzal, Sadegh & M. Ziapour, Behrooz, 2024. "Transient analysis and thermal design of a solar-powered cooling system for an office building: Enhancements using phase change materials and zeotropic mixtures in ejector refrigeration cycle," Energy, Elsevier, vol. 309(C).
    • Handle: RePEc:eee:energy:v:309:y:2024:i:c:s0360544224029013
    DOI: 10.1016/j.energy.2024.133126
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