New Technology: Hybrid Wind-Solar-Rain Eco Roof System

A technical feasibility study of an innovative hybrid solar-wind-rain eco-roof system with natural ventilation
and skylight for electrical energy generation and saving is presented in this paper. The system
integrates and optimizes five green technologies: wind turbine, solar photovoltaic system, rain water
harvesting and utilization system, natural ventilation and roof sky lighting. The design was conceptualized
based on the experiences acquired from meteorological data for Malaysian application. The V-shape
top roof which was designed above the wind turbine was able to increase the wind speed by the venturi
effect before the wind interacts with the wind turbine located between the roofs, hence improve the
performance of the wind turbine. An automatic cooling and cleaning system with a stream of water was
designed to clean and cool the roof which can improve the electrical efficiency of the solar photovoltaic
modules. The ventilation vents of the system allow warm air inside the building to be ventilated out from
the building by the pressure difference caused by high speed wind due to the roof design. The skylighting
in the system improve the living comfort level and reduce power consumption of artificial lighting.
Technical assessment of the system showed the estimated annual energy generated was 21205.65 kWh,
estimated energy savings was 1839.6 kWh, the estimated annual ventilation rate was 2.17 × 108 m3 and
reduction of CO2 emissions was 17767.89 kg/yr
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New Technology: Hybrid Wind-Solar-Rain Eco Roof System

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