Statistical facts:
Energy consumption in retail &
restaurant segments in 2010
TECHNICAL NOTE
2
The basics
Greenfield sites and brownfield sites
Greenfield sites
refer to land which has not been developed before. They include valuable natural land
resources like wetlands, forests, farmland, etc. or other types of land in its natural form. When a shopping
mall is to be developed on a greenfield site, care must be taken to ensure that the development will not
harm any of the natural wetlands or habitats. Social and ecological factors should also be considered, as
well as the economic gains, when agricultural land is involved.
Brownfield sites
refer to land that was once developed but is now wasteland. The old Kai Tak airport is a
good example of a brownfield site. Developing brownfield sites optimises land use and brings improvement
to the neighbourhood and is therefore to be encouraged.
2.1.2 Energy conservation
Energy consumption in shopping malls is mainly electricity consumption. Gas is another energy source when laundries or
restaurants are involved.
Of the electricity generated in Hong Kong, 77% comes from fossil fuels and the remaining 23% comes from nuclear
sources
1
. For every kWh of electricity consumed, 0.7 kg of carbon dioxide is emitted into the atmosphere
2
.
1
The Government of the Hong Kong Special Administrative Region. Electrical and Mechanical Services Department.
2
Guidelines to Account on Green House Gas Emission and Removal from Buildings (Commercial, Residential or
Institutional Purposes) in Hong Kong, 2010 Edition.
2.1
What makes a building green?
8.7
%
Hot Water and
Refrigeration
17.6
%
Others
#
13
%
Lighting
29.4
%
Cooking
31.3
%
Space
Conditioning
#Note: End-uses under this heading include audio-visual, office equipment and
miscellaneous equipment energy uses, etc.
Figure 13 Energy consumption in retail & restaurant segments in 2010
(Source: Hong Kong Energy End-use Data 2012 published by Electrical and Mechanical Services Department)
Hong Kong Green Building Council 49
