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Xu Yuan The Chinese University of Hong Kong
August 21, 2017
@ CityU
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Research question
Are over-cooling and light pollution in Hong Kong’s shopping malls out of rational energy management decisions?
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Energy consumption in Hong Kong
0
500
1 000
1 500
2 000
2 500
3 000
Jan-70 Jan-75 Jan-80 Jan-85 Jan-90 Jan-95 Jan-00 Jan-05 Jan-10 Jan-15
Mon
thly
ele
ctric
ity c
onsu
mpt
ion
(mill
ion
kWh)
Time
ResidentialCommercialIndustrial
0
5
10
15
20
25
30
35
0%
20%
40%
60%
80%
100%
120%
140%
1 2 3 4 5 6 7 8 9 10 11 12
Aver
age
tem
pera
ture
(℃)
Elec
tric
ity co
nsum
ptio
n (%
of m
onth
ly a
vera
ge)
Month
Electricity consumption
Average temperature
1981-2010
Source: Electrical & Mechanical Services Department, 2017; Hong Kong Observatory, 2012; Census and Statistics Department, 2013
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① 25.5℃ thermostat setting ② Earth Hour ③ De-lamp (indoor lighting reduction) ④ Voluntary Charter Scheme on external
lighting reduction
Voluntary energy conservation agreements
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Economic theory on crime and punishment Expected costs Expected benefits
Theoretical framework
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Behavioral response to thermal comfort
Source: Hwang, R. L., Lin, T. P., & Kuo, N. J., 2006.
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Dates: from 29 June to 16 August 2015, for every other week from Monday to Thursday and from Saturday to Sunday
Time: between 2:00pm and 7:00pm, with a one-hour break from 4:00pm to 5:00pm
People approached: 4029 Number of samples: 1868 Response rate: 46.4%
Formal survey
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Selected shopping malls 1. Pacific Place (HK) 2. Harbour City (Kowloon) 3. Festival Walk (Kowloon) 4. New Town Plaza (NT) 5. Uptown Plaza (NT) 6. New Jade Shopping Arcade (HK) 7. Wong Tai Sin Plaza (Kowloon)
Shopping malls
High-end malls
Low-end malls
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Income category of local visitors
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Uptown Plaza
New Town Plaza
Wong Tai Sin Plaza
Harbour City
New Jade Shopping Arcade
Pacific Place
Festival Walk
Hong Kong Population
>$60000$30000-$60000<$30000
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Origins of tourists
Tourists over June-August 2015: 14.9 million in total, 11.7 million (79%) from Mainland China,
6.9 million (46%) overnight visitors Source: HKTB, 2015
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Thermal sensation and satisfaction toward thermal condition
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0.0%5.0%
10.0%15.0%20.0%25.0%30.0%35.0%40.0%45.0%50.0%
Verydifficult
Difficult Average Easy Very easy
Easiness of information acquisition on the mall’s participation in the agreements
[25.5℃]
[De-lamp]
[Earth Hour]
[Voluntary CharterScheme]
Probability of confirming non-compliance
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0.00%10.00%20.00%30.00%40.00%50.00%60.00%70.00%80.00%90.00%
100.00%
Morerevisits
No impact Fewerrevisits
No morerevisit
Potential penalty of non-compliance
[25.5℃]
[De-lamp]
[Earth Hour]
[Voluntary CharterScheme]
Voluntary penalty on non-compliance
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Hotness in shopping malls is more likely to chase away shoppers than coldness, while unsatisfactory lighting conditions are unlikely to chase away mall shoppers. Advertising effects of outdoor lighting are positive and significant on tourists.
Green preference is weak in mall selection and public surveillance is lacked.
Over-cooling and light pollution are indeed out of largely rational energy management decisions.
Conclusion
Variables 25.5 degree Earth Hour External light De-lamp Cost of compliance High Low High Low
Monitoring effectiveness
Low Low Low Low
Voluntary penalty Low Low Low Low
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Funding for this research was provided by the Hong Kong Central Policy Unit through the Public Policy Research Funding Scheme 2015-16 (2014.A4.004.15A).
Publications: Kwok, T. F., Y. Xu, P. T. Wong, 2017. Complying with
Voluntary Energy Conservation Agreements (II): Lighting in Hong Kong's Shopping Malls. Resources, Conservation and Recycling. 117: 225-234.
Kwok, T. F., Y. Xu, P. T. Wong, 2017. Complying with Voluntary Energy Conservation Agreements (I): Air Conditioning in Hong Kong's Shopping Malls. Resources, Conservation and Recycling. 117: 213-224.
Acknowledgement