Enhancing the thermal performance of courtyard office building in hot-humid climate : a case study of development department building UniMAP
Courtyard is considered a natural alternative for cooling since it has high ability to create a local climate within a building that is nicer than the outside which leads to create temperature difference between indoor and outdoor. The efficiency of courtyard in hothumid climate still questionabl...
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| Format: | Thesis |
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| Language: | English |
| Subjects: | |
| Online Access: | http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78004/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78004/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78004/4/Eshra%27a.pdf |
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| Summary: | Courtyard is considered a natural alternative for cooling since it has high ability to create
a local climate within a building that is nicer than the outside which leads to create
temperature difference between indoor and outdoor. The efficiency of courtyard in hothumid
climate still questionable due there are minimal research reported especially in
Malaysia. The objective of this research is to perform a simulation study using
EnergyPlus simulator to explore the influence of the presence of a courtyard in a single
storey office building via investigating the impact of natural ventilation, window glazing
and window blind shading on the thermal performance of the building on 21 April and 21
October that representing the dry season and wet season days in Malaysia. The
Development Department building at University Malaysia Perlis (UniMAP) that is
located in Pauh Putra Campus has been taken as a case study. The results show that the
stack ventilation is the most effective way to reduce the indoor air temperature due to its
high ability on exchanging the indoor warm air with the cooler one in the courtyard. In
contrary, the cross ventilation has the greatest impact on reducing the relative humidity
within the building since it is capable to dilute the moist concentration in the interior
spaces as a result of airflow. The best PMV values for ventilation effect is obtained for
stack ventilation, indicating its effectiveness in enhancing the thermal comfort of the
building. Moreover, venetian blind shading is capable to reduce the indoor air temperature
for the building and using external blind is more effective due to its impact on blocking
sun radiation. Additionally, the external venetian blind causes to increase the relative
humidity within the building compared to no window shading case due to the reduction
of air temperature. Generally, window shading reveals an enhancement on PMV values
and the external blind has the most effective where it is capable to shift PMV values
within comfortable level during wet season, but it does not much impact on the thermal
sensation level during dry season. Using double and triple glazing windows able to
reduces the indoor air temperature and in contrary, relatively increases the humidity
within the building compared to using single glazing window. The PMV values of glazing
effect revealed that using multi-layered glazing window slightly enhances the thermal
sensation for occupants but it is not able to reduce the uncomfortable hours on both design
days. Finally, it can be observed that the ventilation is the most effective factor on
reducing the air temperature and relative humidity, as well as to enhance the thermal
comfort level for courtyard buildings in hot-humid climate among the other studied
parameters. This work contributes to sustainable architecture where courtyard application
concept is used in hot-humid climate specifically for Malaysia due to its effective ability
to enhance the thermal performance and help in improving the thermal comfort level near
to the desired values. |
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