Cover
Vol. 21 No. 1 (2021)

Published: January 31, 2021

Pages: 1-7

Original Article

Indoor Air Quality in a Cardiac Care Unit (CCU) under Different Ventilations

Abstract

A proper ventilation offered warranty for a perfect indoor environment. Indoor air environment includes indoor thermal environment and indoor air quality (IAQ). In this paper a numerical investigation of the indoor environment in different ventilations was accomplished. The Cardiac Care Unit (CCU) in Al-Rifai hospital in Thi-Qar governorate was chosen to be investigated, and its thermal achievement and indoor air quality in the hot summer weather were simulated. For the numerical study, the fluent technique used to set up the physical and numerical model of CCU. An attention has been paid carefully to considerate the distributions of the temperature and the velocity fields, followed by an argument of two different ventilation patterns; up-in and up-out ventilation (UV) and displacement ventilation (DV). After making the comparison, it was noticed that the displacement ventilation (DV) is clearly super than that of the up-in and up-out ventilation (UV) due to improvement in the indoor air quality.

References

  1. Li Yang, “The Application of CFD Technology in Analysis of Residential Wind Environment”, Journal of Urban Technology, Vol. 12, No. 17, pp. 67-81, 2010.
  2. Feng Q., “Research of the Air Conditioning System with CPCP and DOAS Via CFD”, Residential Technology, Vol. 30, No. 12, 2010.
  3. Lin Z., Chow T. T., Fong K. F. and Chen Q. “Validation of CFD Model for Research into Application of Displacement Ventilation to Hong Kong Buildings”, The Proceedings of the 3rd International Symposium on Heating Ventilation and Air Conditioning, Shenzhen, China, Vol. 2, 602-613, 1999.
  4. Karina Ponsoni and Maria Stella Gonçalves Raddi, ‘‘Indoor Air Quality Related to Occupancy at An AirConditioned Public Building’’, Brazilian Archives of Biology and Technology, Vol. 53, No. 1, pp. 99-103, 2010.
  5. Ahmed Qasim Ahmed, Shian Gao, “Thermal comfort and energy saving evaluation of a combined system in an office room using displacement ventilation”, World Academy of Science, Engineering and Technology, International Journal of Mechanical and Mechatronics Engineering, Vol. 9, No. 6, pp. 1078-1083, 2015.
  6. Ahmed Qasim Ahmed, Shian Gao, and Ali Khaleel Kareem, “A numerical study on the effects of exhaust locations on energy consumption and thermal environment in an office room served by displacement ventilation”, Elsevier, Energy Conservation and Management, Vol. 117, pp. 74-85, 2016.
  7. Ahmed Qasim Ahmed, Shian Gao, and Ali Khaleel Kareem, “Energy Saving and Indoor Thermal Comfort Evaluation Using a Novel Local Exhaust Ventilation System for Office Rooms”, Elsevier, Applied Thermal Engineering, Vol. 110, pp. 821-834, 2017.
  8. Yang Li, ‘‘Numerical Simulation and Analysis for Indoor Air Quality in Different Ventilation’’, Health, Vol. 4, No.12, pp. 1352-1361, 2012.
  9. Son Hong Ho, “Numerical Simulation of Thermal Comfort and Contaminant Transport in Air-Conditioned Rooms”, M.Sc. Thesis, Department of Mechanical Engineering, College of Engineering, University of South Florida, November 8, 2004.
  10. Ali Dogrul, Yavuz Hakan Ozdemir and Seyfettin Bayraktar, “Modelling of a HVAC unit in a room for performance analysis (R1-TS29-PP03)”, Clima 2010: 10th REHVA World Congress: Sustainable Energy Use in Buildings: 9-12 May, Antalya, Turkey, 2010.
  11. Son H. Ho, Luis Rosario and Muhammad M. Rahman, “Three-dimensional analysis for hospital operating room thermal comfort and contaminant removal”, Elsevier, Applied Thermal Engineering, Vol. 29, Issue 10, pp. 2080
  12. Hazim Awbi, ‘‘Ventilation of Building’’, Book reviewsecond edition, International Journal of Ventilation, Vol. 2, No. 3, 2003.
  13. Xu L., Weng P.F. and Sun W. M., ‘‘The Indoor Air Flow Organization and Indoor Air Quality Numerical Analysis of Three Ventilation Modes’’, Journal of Air Dynamics, Vol. 21, pp. 311-319, 2003.
  14. ANSYS Users Guide, Version 15, 2013.
  15. Shui Yu, Guojuan Zhang, Yuanliang Ma, ZhitianYu and Guohui Feng, “Numerical Simulation Study on Concentration Distribution of Indoor Pollutions by Different Natural Ventilation Strategies in Shenyang”, Elsevier, Procedia Engineering, Vol. 205, pp. 1389-1396, 2017.