Malaysia is experiencing a high average annual energy demand growth rate of approximately 2.3% which large portion of that energy is used by office buildings.
%�쏢 [����۸�M Under the hot-humid climatic conditions in Malaysia, high-rise office buildings with large or fully glazed façades are facing a major problem of overheating due to high solar radiation through the glazed façades. In the use of shading devices like light shelves, problems with low angle winter sunlight penetration can give rise to glare. Keep the area of glazing on the east and west orientations to a minimum where possible, still allowing for good cross-ventilation (see Passive cooling), or use appropriate shading devices. Horizontal shading devices, such as awnings, overhangs or recessed windows, are usually applied in the south orientation, but also have some impact on east and west facades. The angle of the louvers is adjusted throughout the day to provide optimal shading. ��3Eq9ט�v��A�YŲ��h��Y���(gJ'7+/���>J�V.�C��l�S�sJn��UƆ�T�� /�ir�&�#@����#PԚ�c�.��'0�`� In conclusion, the use of shading devices is more effective in achieving cooling energy savings compared to the use of high performance glazing under the hot-humid climate of Malaysia.Peer review under responsibility of The Gulf Organisation for Research and Development.We use cookies to help provide and enhance our service and tailor content and ads.
Additional shading strategies include recessing glazed openings, and incorporating porches, balconies, and mature vegetation to shade east and west walls as well as outdoor areas.
It is recommended to use shading devices on low performance glazing compared to high performance glazing since the energy savings are more significant when shading devices are used on low performance glazing.
15 Interior at East Façade The aim also extends to investigations on different cooling energy savings when shading devices are applied on façade glazing with different configurations and thermal performances. [�^�,װZrW����Hk�F8|���N�%3Y�a���� x��Y_o7�O�om�����c���P^h��I�����h��_��]{����ޅP���m����o�xf��W�6�J?������y����N 6��a�((��J�X��0x��~}�}��~ݥ}�wQ8偅�95��eL ��N�L{��Od����E;8��6g�����_?J�/�ߖ�������_"�+R�0/����d �o`۳UE�&�����1ј=�fK�?3�D���i3wh�f�`t �Jl@F4^�����z2�;�ɗ�^eZ��Ms��!r{|%�E�/��Ho�~�t9��^Č&R3�0~�����;g�m�����Y$�7b~�k}���.
Production and hosting by Elsevier B.V.ScienceDirect ® is a registered trademark of Elsevier B.V. In South Korea, the evaluation criteria for installing shading devices are defined by regulations, but the standards of design methods are not clearly established. r�*�R����u�R4��p��;���[eqp+U>E��ʎq�>oIm�ZM���9?�-�bɷ��Om;����[���86�{��Wg�����|��e�_ _1?��K��k9ĸkVI�B}�?�C�� The results also suggest that use of various shading devices on low-e double glazed façades will result between 1.0% and 3.4% annual cooling energy savings, depending on the types of shading devices and façade orientations. Applying shading devices on the West and East façades will result in higher annual cooling energy savings compared to North and South façades under hot-humid climates. Case Study: California Energy Commission East Façade uses movable vertical fins. 3. This has caused high cooling energy requirements. The estimated annual cooling energy savings increase to between 5.0% and 9.9% when the shading devices are applied to all orientations of low-e double glazed façades. The simulation results indicate that high-rise office buildings in Malaysia use approximately 45.9% of total building energy for cooling purposes. Rapid growing of energy use has raised critical concerns over energy supply difficulties and negative environmental impacts globally and among ASEAN countries. The simulation results show that egg-crate shadings are able to produce the highest annual cooling energy savings compared to vertical shadings and horizontal shadings.
However, The installation of shading devices has become mandatory for some public buildings due to revised regulations. Y��K7ޡ� ... East and West facades use movable exterior blinds. 4. This study recommends prioritizing shading devices on the East and West façades for optimized annual cooling energy savings. Both horizontal and vertical layouts are considered. <>
The estimated annual cooling energy savings further increase to between 5.6% and 10.4% when the façade glazing is replaced by single clear glazing. Since a building may have glazed facades that are not south-oriented, the effect of shading devices in other orientations must be studied. Adjustable shading, such as external blinds, is the optimum solution for these elevations. ���ʇ��� 7�0���C������p} dA�� �1"�2��������D�l��-��{?��8��}|��mh>c�X��z�X:��~b�$�-V�L�B The aim of this study is to investigate the potential of three types of shading devices on cooling energy savings when applied at different façade orientations. Effective solar shading on the South, East and West façades can be achieved only by using an operable shading louver system on the building’s façade.
In this work, the performance of louver shading devices applied to east, west and south façades is evaluated for different latitudes.
Disadvantages of Sun Shading Devices Difficulties can be experienced in handling the internal shading devices like curtains and blinds.
If the building is highly stylized (e.g. Twenty simulation building models were applied with different shading devices at different façade orientations and with high and low performance façade glazing. Egg-crate shading devices are able to result in higher annual cooling energy savings compared to vertical shading and horizontal shading under hot-humid climates.
Adjustable shading devices can be repositioned to allow for seasonal temperature variations or user control during unusually warm or cool periods. 14 North windows use vertical fins (structure).
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