Three-dimensional air distribution analysis of different outflow typed operating rooms at different inlet velocities and room temperatures

Hande Ufat,Nurettin Yamankaradeniz,Omer Kaynakli,Recep Yamankaradeniz

doi:10.1177/1687814017707414

Hande Ufat, Nurettin Yamankaradeniz + Show 2 more

Open Access

https://doi.org/10.1177/1687814017707414

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Journal: Advances in Mechanical Engineering	Publication Date: Jul 1, 2017
Citations: 5	License type: cc-by

Affiliation: Uludağ University

Abstract

It is important to provide a regular unidirectional air distribution in an operating room to reduce the number of particles. Measurements were taken in the one of the operating rooms at Uludag University Medical School, with laminar air flow unit and two-cornered outlet which was thought to have some airflow problems. Moreover, a three-dimensional computational fluid dynamics model has been developed where the measurements were taken in. The distributions of air velocity, temperature, and relative humidity have been examined and compared with the measurements to validate the computational fluid dynamics analyses. In addition to present model, four-cornered outlet operating room has been analyzed and compared with the results of two-cornered one. It is concluded that the case of four-cornered outlet provides more suitable thermal distribution, which results in a reduction of the particle numbers in the interior. Although there is no significant change in temperature and relative humidity in the operating room, air distribution changes dramatically.

Highlights

An operating room (OR) air conditioning system is designed to reduce the risk of infection to the patients and OR staff and provide the best possible thermal comfort.[1,2] Poorly ventilated ORs make the surgical staff and the patient uncomfortable and can spread infection.[3]
According to the obtained findings, the results were significantly better when eight outlet grilles, set in such way that 2/3 of the air is absorbed from the low-level grilles, while 1/3 is absorbed from the high-level grilles, Figure 12
Were providing air flow from four corners comparing to the same operation conducted by four outlet grilles in two corners

Summary

Introduction

An operating room (OR) air conditioning system is designed to reduce the risk of infection to the patients and OR staff and provide the best possible thermal comfort.[1,2] Poorly ventilated ORs make the surgical staff and the patient uncomfortable and can spread infection.[3]. These preferred standards and guidelines are ASHRAE, DIN 1946/4, and VDI 2167;5 Table 1 defines the environmental parameters of these standards

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Results

Conclusion