Introduction

The purpose of this Study of Wind Energy Resources over Hong Kong website is to promote a better understanding of the potential to use wind energy in Hong Kong. The main feature of the Study of Wind Energy Resources over Hong Kong website is an interactive map that can be used to provide estimates of wind speed and energy in Hong Kong during any period from 1 January 2004 to 31 December 2006. Estimates can be given for specific points, or for selected areas. The website also provides maps illustrating Hong Kong's land classifications as well as the distribution of wind resources within the city. 

Background

Beginning from 2005, the Hong Kong Government aims to have between 1 to 2% of Hong Kong's total electricity supply met by power generated from renewable sources by the year 2012. Renewables currently provide far less than 1% of Hong Kong's electric power. The largest wind turbine operating in Hong Kong today is an 800 kilowatt (kW) wind turbine installed at Lamma Island. Hong Kong also has several hundred kW of solar photovoltaic panels on buildings. Hong Kong is evaluating the prospects for waste-to-energy and an additional on-shore wind turbine as well as off-shore windfarms of up to 200 megawatts.

The most important factor in selecting a location for wind power is the amount of wind energy available. Since wind energy is a cubic function of wind speed, higher wind speeds mean higher wind energy potential. Wind energy potential is indicated on maps in terms of wind power density (W/m2).

The availability of land is also an important consideration for wind power. Vacant land or farm land is the most suitable, though the government could possibly consider directing some wind power installations in country parks. While wind energy potential is often higher on hilltops, one of the challenges is to remain within the aviation height restrictions that apply throughout Hong Kong. It is usually important to have a connection between the wind turbines and the power grid so all the wind power can be used.

Cost is one of the main considerations for development of wind power. Except in the windiest places, wind power tends to cost more than conventional power. In many countries, including China, government policy helps to support wind energy so that it is commercially viable, even at a higher cost.