DOI: 10.5176/2301-394X_ACE18.119
Authors: Yuanli Lyu, Hui Long, Tin-tai Chow and Wenjie Liu
Abstract:
Low-energy facade with passive and active solar design integration is an evolving low-carbon-building technology against climate change. Two new features for green walling applications are discussed in this paper, namely the water-flow glazing system and the hybrid photovoltaic/heat-pipe walling system. The solarabsorbing glazing serves as the see-through component and the hybrid solar walling the opaque component. Both can behave as building-integrated solar thermal collectors, for example to support domestic hot-water preheating. With the solar cell integration, direct electricity generation with effective PV cooling is also possible. The useful energy conversion reduces the solar transmission through the building envelop and hence reduces the space cooling load. All these together contribute to substantial energy saving and carbon emission reduction. The thermal comfort environment is also improved. A case study of Hong Kong was worked out as an illustrating example.
Keywords: sustainable building; hybrid solar design; lowcarbon technology; building envelope
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