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Keywords: Building
Project and Facilities Management
Wong Nyuk Hien
2013/2014 PFM
Issue Date: 2-Jul-2014
Citation: WEE LING YAN (2014-07-02). THE IMPACT OF LIGHTING ON GREEN WALLS. ScholarBank@NUS Repository.
Abstract: The benefits of vertical greenery systems (VGS) are widely recognized such as mitigating urban heat island effects, aiding in energy consumption, and also creating a conducive and aesthetically pleasing environment for people (National Parks, n.d.). Even such, many users still face challenges in identifying a suitable location for VGS where essentials such as sunlight, water, carbon dioxide, and nutrients are abundant. These considerations have restricted users to place the VGS indoor where light in particular is insufficient or limited. However, if a VGS is placed indoors, users are required to supply artificial lightings to support the VGS. This has inevitably led to an additional cost component incurred in maintaining the VGS. Therefore, users might be reluctant to utilize dead spaces inside the building for VGS. This paper aims to deliver a framework to identify cost-saving solution for maintenance so as to encourage more users to adopt an indoor VGS. The solution provided is to determine the minimal lighting level for plants to survive. This solution would potentially help the users to avoid overprovision or under provision of the lighting to the indoor VGS. Firstly, the literature review and exploratory study are done to understand how reduced lighting levels can influence the growth of the plants. This is followed by carrying out the experiment across a period of 18 weeks at the Structural Lab in National University of Singapore - School of Design and Environment. The treatment required the selected plants, namely Philodendron and Dracaena to be exposed to a DLI range from 0.00 – 4.00 mol/m2/day. The threshold would be the lighting level where the growth of the plant starts to compromise. The results of the experiment have proved that the plants used are capable of growing at a much lower lighting level. The minimal lighting level is identified to be from the range between 0.5-1.0 mol/m2/day, where it can save at least 76% in cost if the minimal lighting level to be supplied were determined accurately and used.
Appears in Collections:Bachelor's Theses

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