Energy Conservation Analysis and Performance for ENVLOAD of Green Office Building
Date Issued
2014
Date
2014
Author(s)
Wei, Hsiang-Ling
Abstract
Constructing greening system on a building envelope can effectively retard the heat transfer process through the envelope and at the same time increase its thermal mass. Besides, the physiological effects of plants enhance the ability of heat release, which can help cooling the building. Especially, the heat dissipation of evapotranspiration process is the most significant. Moreover, plants can abate solar radiation that entering a building envelope and therefore reduce heat gain and drop indoor temperature. In order to quantify the effect of radiation transmission through plants, the theory and algorithms according to references have been written in MATLAB language then verified by solar radiation experiments. So that the model can be utilized to simulate indoor temperature or energy consumption.
Nearly half of world energy consumption is generated from buildings; and daily use occupied most of the proportion. In Taiwan, as located in subtropical climate, 40 percent of electric peak demand comes from power which is used for building air-conditioning in summer. Thus, reducing cooling electricity consumption in summer is considered the most important countermeasure for energy conservation and sustainable development. Therefore this research mainly discusses the improvement of thermal performance and energy saving when using greening system. We replaced the complicated dynamic analyze program which is limited to professional operation by a simple, robust cooling load calculation method named RTS(Radiant Time Series). Hence, users can be easier to predict the energy-saving efficiency and do benefit analysis at initial phase of design.
After affirming the expressions for radiation scattering in plants and cooling load simulation of green buildings are all justified, this study further recommends that ENVLOAD for office building should be revised by adding parameters－radiation transmission of plants (Kp) and net long-wave radiation (IL) to encourage designers to involve sustainable strategy in buildings. Consequently, the applicability of ENVLOAD will be improved and further applied to energy conservation benefit estimates.
Subjects
綠建築
植生牆
植物輻射折減
節能
空調負荷
NVLOAD
RTS(Radiant Time Series)
Type
thesis
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