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Jadidi, Amir Mohammad, Rahmati, Bahram, Heidarian, Ali. (1397). Effect of opening diffuser and return vent location on air quality, thermal comfort and energy saving in desk displacement ventilation (DDV) system. هنرهای کاربردی, 5(2), 139-148. doi: 10.22075/jhmtr.2018.12784.1193
Amir Mohammad Jadidi; Bahram Rahmati; Ali Heidarian. "Effect of opening diffuser and return vent location on air quality, thermal comfort and energy saving in desk displacement ventilation (DDV) system". هنرهای کاربردی, 5, 2, 1397, 139-148. doi: 10.22075/jhmtr.2018.12784.1193
Jadidi, Amir Mohammad, Rahmati, Bahram, Heidarian, Ali. (1397). 'Effect of opening diffuser and return vent location on air quality, thermal comfort and energy saving in desk displacement ventilation (DDV) system', هنرهای کاربردی, 5(2), pp. 139-148. doi: 10.22075/jhmtr.2018.12784.1193
Jadidi, Amir Mohammad, Rahmati, Bahram, Heidarian, Ali. Effect of opening diffuser and return vent location on air quality, thermal comfort and energy saving in desk displacement ventilation (DDV) system. هنرهای کاربردی, 1397; 5(2): 139-148. doi: 10.22075/jhmtr.2018.12784.1193

Effect of opening diffuser and return vent location on air quality, thermal comfort and energy saving in desk displacement ventilation (DDV) system

Journal of Heat and Mass Transfer Research
مقاله 50، دوره 5، شماره 2 - شماره پیاپی 10، بهمن 2018، صفحه 139-148    اصل مقاله (1.44 M)
نوع مقاله: Full Length Research Article
شناسه دیجیتال (DOI): 10.22075/jhmtr.2018.12784.1193
نویسندگان
Amir Mohammad Jadidi* 1؛ Bahram Rahmati2؛ Ali Heidarian3
1Semnan University
2Student of BSC, Semnan University, Semnan, Iran
3BSC Student, Semnan University, Semnan, Iran
تاریخ دریافت: 30 مهر 1396،  تاریخ بازنگری: 08 خرداد 1397،  تاریخ پذیرش: 31 خرداد 1397 
چکیده
Recently, many investigations have been performed on return vent height; showing that the height of 1.3 m from the floor is the best height for this vent. In this article, the effect of distance between opening diffuser and return vent was investigated on air quality, thermal comfort and energy saving. The results showed, by increasing the distance between opening and return vent up to 5 m, the return vent could be placed near the floor at height of 0.6 m without any unacceptable result in indices. Therefore in this case, energy saving of 15.8% could be achieved rather than 8%, 10.9% and 15.2% in other cases. But, the air quality was lower than other cases. The case which brought better air quality and more thermal comfort with acceptable energy saving of 15.2%, was when the opening and return vent were relocated at maximum distance between them (5 meters) and return vent was placed at the suggested height of 1.3 m from the floor, which was the optimum case in this research.
کلیدواژه‌ها
Displacement ventilation؛ Air quality؛ Thermal comfort؛ Energy saving؛ Desk Displacement Ventilation
مراجع
  1. F. Rupp, N.G. Vasquez, R. Lamberts, A review of human thermal comfort in the built environment, Energy and Buildings, Vol. 105, pp. 178-205, 2015.
  2. Zhang, X. Zhang, S. Li, X. Jin, Review of under floor air distribution technology, Energy and Buildings, Vol. 85, pp. 180-186, 2014.
  3. Loomans, the Measurement and Simulation of Indoor Air Flow, PhD Thesis, Eindhoven University, Netherlands, 1998.
  4. a. A.-C. E. American Society of Heating, 2009 ASHRAE Handbook: Fundamentals: American Society of Heating, Refrigeration and Air-Conditioning Engineers, 2009.
  5. Cao, H. Awbi, R. Yao, Y. Fan, K. Siren, R. Kosonen, J. Zhang, A review of the performance of different ventilation and airflow distribution systems in buildings, Building and Environment, Vol. 73, pp. 171-186, 2013.
  6. Griefahn, C. Künemund, U. Gehring, Evaluation of draught in the workplace, Ergonomics, Vol. 45, No. 2, pp. 124-135, 2002.
  7. Lin, T. T. Chow, K. F. Fong, C. F. Tsang, Q. Wang, Comparison of performances of displacement and mixing ventilations. Part II: indoor air quality, International Journal of Refrigeration, Vol. 28, No. 2, pp. 288-305, 2005.
  8. Shan, J. Zhou, V. W. C. Chang, E.-H. Yang, comparing mixing and displacement ventilation in tutorial rooms: Students' thermal comfort, sick building syndromes, and short-term performance, Building and Environment, Vol. 102, pp. 128-137, 2016.
  9. Chen, S. Janbakhsh, U. Larsson, B. Moshfegh, Numerical investigation of ventilation performance of different air supply devices in an office environment, Building and Environment, Vol. 90, pp. 37-50, 2015.
  10. Schiavon, D. Rim, W. Pasut, W. W. Nazaroff, Sensation of draft at uncovered ankles for women exposed to displacement ventilation and under floor air distribution systems, Building and Environment, Vol. 96, pp. 228-236, 2016.
  11. Kavgic, D. Mumovic, Z. Stevanovic, A. Young, Analysis of thermal comfort and indoor air quality in a mechanically ventilated theatre, Energy and Buildings, Vol. 40, No. 7, pp. 1334-1343, 2008.
  12. Abou Hweij, N. Ghaddar, K. Ghali, C. Habchi, Optimized performance of displacement ventilation aided with chair fans for comfort and indoor air quality, Energy and Buildings, Vol. 127, pp. 907-919, 2016.
  13. El-Fil, N. Ghaddar, K. Ghali, Optimizing performance of ceiling-mounted personalized ventilation system assisted by chair fans: Assessment of thermal comfort and indoor air quality, Science and Technology for the Built Environment, Vol. 22, No. 4, pp. 412-430, 2016.
  14. Lin, T. T. Chow, C. F. Tsang, K. F. Fong, L. S. Chan, CFD study on effect of the air supply location on the performance of the displacement ventilation system, Building and Environment, Vol. 40, No. 8, pp. 1051-1067, 2005.
  15. Raftery, F. Bauman, S. Schiavon, T. Epp, Laboratory testing of a displacement ventilation diffuser for under floor air distribution systems, Energy and Buildings, Vol. 108, pp. 82-91, 2015.
  16. Heidarinejad, M. H. Fathollahzadeh, H. Pasdarshahri, Effects of return air vent height on energy consumption, thermal comfort conditions and indoor air quality in an under floor air distribution system, Energy and Buildings, Vol. 97, pp. 155-161, 2015
  17. Q. Ahmed, S. Gao, A. K. Kareem, A numerical study on the effects of exhaust locations on energy consumption and thermal environment in an office room served by displacement ventilation, Energy Conversion and Management, Vol. 117, pp. 74-85, 2016.
  18. Q. Ahmed, S. Gao, A. K. Kareem, Energy saving and indoor thermal comfort evaluation using a novel local exhaust ventilation system for office rooms, Applied Thermal Engineering, Vol. 110, pp. 821-834, 2016.
  19. Chen, W. Xu, A zero-equation turbulence model for indoor airflow simulation, Energy and Buildings, Vol. 28, No. 2, pp. 137-144, 1998.
  20. Fluent Inc., Airpak User Guide, 2007.
  21. O. Fanger, Thermal comfort: Analysis and applications in environmental engineering: Danish Technical Press, 1970.
  22. International Organization for, ISO 7730: Moderate Thermal Environments - Determination of the PMV and PPD Indices and Specification of the Conditions for Thermal Comfort: ISO, 1994.
  23. International Organization for, A. Ac, Ergonomics of the Thermal Environment: Analytical Determination and Interpretation of Thermal Comfort Using Calculation of the PMV and PPD Indices and Local Thermal Comfort Criteria: ISO, 2005.
  24. Sandberg, M. Sjöberg, The use of moments for assessing air quality in ventilated rooms, Building and Environment, Vol. 18, No. 4, pp. 181-197, 1983.
  25. Cheng, J. Niu, N. Gao, Stratified air distribution systems in a large lecture theatre: A numerical method to optimize thermal comfort and maximize energy saving, Energy and Buildings, Vol. 55, pp. 515-525, 2012.
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