The control of temperature comfort condition, relative humidity percentage, air flow velocity, and the amount of air change per hour (ACH) in an operating room are essential things that should be considered in designing the heating, ventilation, and air conditioning (HVAC) system the air conditioning system.
The location and amount of the inlet and outlet air of the diffusers are essential factors in creating comfort conditions. In this paper, using numerical simulation with Ansys fluent software and the k-ω method, an operating room in a hospital in Dezful city located in Iran and is working well at the moment has been studied in terms of air conditioning. The geometry of the room model has a patient bed, four treatment staff members, a light for the surgery, and ceiling lights. Fresh air for ventilation is supplied to the operating room by ceiling diffusers and exited by grilles on the four corner walls. In this paper, the numerical simulation has been done by using computational fluid dynamics (CFD) modeling. The purpose of this study is to present and discuss the solutions to temperature, relative humidity percentage, and air velocity near the patient lying. All the actual conditions from the experimental data have been applied to this simulation. Finally, it has been concluded that comfortable temperature, humidity, and flow velocity conditions can be achieved using a sound ventilation system. Also, by selecting the best location for diffusers and grilles, the air around the patient bed area will be ventilated with high quality as world standards view.
