Ismail, Mazran
(2010)
The Potential Of Hybrid Turbine
Ventilator To Improve Indoor Climatic
Conditions In Hot-Humid Environment.
PhD thesis, Universiti Sains Malaysia.
Abstract
This thesis presents the results of the empirical studies regarding the possibilities of
improving indoor climatic conditions in the hot-humid environment with the use of
hybrid turbine ventilator (HTV). From the literature, it is found that the fan assisted
stack ventilation strategy like the HTV is one of the most potent strategies to be applied
in this high solar radiation and low wind velocity region of Malaysia. Through the pilot
experiment study, an optimum configuration of the HTV has been determined, which is
the new configuration with inner duct and larger free upper outlet area is found to show
the best performance in inducing indoor air movement. Then, a series of full-scale field
measurement studies conducted in the real building and under real weather conditions
confirmed the significance of the device in improving indoor climatic conditions. The
study shows that the strategy of applying HTV for occupied space achieved to reduce
indoor air temperature and relative humidity (RH) level significantly and succeeded to
induce air movement in the occupied level of up to 0.38m/s in the windows and doors
are kept opened case. However, although all the HTV application strategies succeeded
to reduce the Operative Temperature (OT) and Standard Effective Temperature (SET*)
level compared to the existing condition, the overall results revealed that it is still not
able to ensure occupants’ thermal comfort level at most of the time, when the OT
achieved were above the upper comfort limits of 30.0°C for about 21% to 45% during
the study period. One possible improvement of the device derived from the results is by
applying the HTV for both attic and occupied spaces at the same time and ensure that
openings are kept opened.
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