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Control and Optimization of Office Building Air Conditioning System Taking Into Account Dynamics of Energy Demand, Ambient Indoor and Outdoor Air Quality and Indoor Air Quality Standards

Khamisabadi, Zahra | 2025

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 58110 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Khajehpour, Hossein; Hassanvand, Mohammad Sadegh
  7. Abstract:
  8. Office buildings, as one of the largest energy consumers in the building sector, play a significant role in national energy consumption. Given the importance of energy optimization in achieving sustainable development, reducing energy consumption in these buildings not only lowers costs but also helps preserve natural resources and mitigate environmental impacts. In this regard, providing energy optimization solutions, improving efficiency, and revising operational patterns play a key role in reducing energy consumption and ensuring user comfort. On the other hand, attention to indoor air quality is equally critical, as polluted indoor air can negatively affect the health and productivity of occupants. Therefore, optimizing the performance of air handling systems to ensure desirable indoor air quality, alongside reducing energy consumption, is an undeniable necessity. In this study, energy optimization in HVAC systems was investigated with the aim of reducing energy consumption while maintaining desirable indoor air quality. A box model and mass-energy balance equations were employed to model pollutant concentrations and indoor temperature. Using a comprehensive code, the relationships between energy consumption, pollutant concentrations, and indoor temperature in the HVAC system were implemented, and the system's performance was evaluated under 12 different scenarios. These scenarios included six for normal days and six for polluted days, examining the impact of using clean and dirty filters in the HVAC system, as well as an independent air purifier in the room. Energy consumption and indoor air quality were analyzed in these scenarios. The results revealed that adjusting damper angles, along with using clean filters, could reduce system energy consumption by 19% while maintaining indoor air quality within standards. Additionally, the use of an air purifier on polluted days, in conjunction with clean filters, demonstrated the best performance in reducing pollutants. This study emphasizes that integrated approaches, including automatic damper adjustment, and the use of filters and air purification equipment, can lead to optimized energy consumption and maintained indoor air quality
  9. Keywords:
  10. Air Pollution ; Building Heating System ; Energy Optimization ; Building Air Conditioning Controller System ; Indoor Air Pollution ; Indoor Quality ; Energy Demand

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