Proper Supply Air Distribution Inside A Ship Cabin For A Best Ventilation Efficiency In Basrah City

  • Husain A. Etaiwi College of Eng.-basrah university
  • Ali A.Monem Mechanical Eng. dept. College of Engineering –Basrah university
  • Emad A. Khazal Mechanical Eng. Dept. College of Engineering-Basrah university
Keywords: s: Air Diffusion performance Index (ADPI), Computational Fluid Dynamic (CFD), Air supply location, Space Diffusion Effective Factor (SDEF), Air Changing per Hour (ACH)


This paper focuses on the thermal comfort inside a selected Iraqi ship’s (GOUGE) cabin
space whom working in the Umqaser port. Because of limited space and low ceiling height of
these cabins, a low mixing ratio between the supplied conditioned air and the indoor air is
expected. This lack of homogeneity of the air mixture causes many health problems for the
crew and reduces their effectiveness. A computational fluid dynamics (CFD) has been used
within the program (ANSYS 15) for the purpose of analysis and solving the equations of mass,
momentum and energy and to compare the numerical results obtained from the program with
the experimental results for distribution the temperature, velocity and relative humidity of the
air conditioned inside Iraqi ship’s cabin, where the results showed good matching.
A full scale test cabin has been designing and building as a simulator cabin with the same
specifications of the real cabin to validate the measurements which carried out on this test cabin
with the experimental and numerical results on the real cabin. In this study different supply
diffusers are tested, such as square and circular ceiling diffusers, side wall register and slot
diffuser. It was found that the ceiling square diffuser is the proper diffuser for the cabin. This
study focuses on the air changing per hour, also on the air diffusion inside the cabin, taking into
consideration the climatic basrah where the temperature and high humidity.