The design and performance monitoring of an eco-building : a case study in Hong Kong

To investigate and demonstrate the effectiveness of applications of available environmentfriendly technologies in buildings in Hong Kong, a number of eco-building concepts are used on a small building in the Kadoorie Farm and Botanic Garden in Hong Kong including 4 kW photovoltaic-roof, roof rainwater collection system, grass roof design, sunroof for lighting, and double-glazing external walls for better insulation. This paper mainly reports the simulation and data monitoring results of the rainwater collection system and photovoltaic system. The supply and utilization of rainwater for different types of buildings were investigated. The findings such as the supply, the demand of flushing, feasibility, reliability and energy saving of using rainwater are also reported in this paper. The annual energy performance and green house gas emission reduction are presented for the solar PV roof installation. Data monitoring has shown that the performance of both the rainwater collection system and the solar PV system is good and meets the design expectations.