Automobiles:
Simple calculations can be done to find energy used per day (per car). Since personal cars are not as popular in Hong Kong as other countries, a low number should be expected.
Average data was found for Hong Kong and energy per unit fuel was given as 10 kWh per liter. The average distance traveled in a private car is 2.5 km per day. The distance per unit fuel (fuel economy) is (on average) 16 km per liter. Using these values in Equation 1 outputs an estimated 1.5 kWh per day.
Jets:
Similar calculations can be done for a Boeing 747 for an average number of passengers and distances. for the UK, the energy used per day was found to be around 30 kWh per day. Given that Hong Kong has air traffic population one-third the size of the UK, an end result of 10 kWh per day was found.
Note: Assumption made that similar jets are used in both countries.
Heating and Cooling: Domestic water heating includes the use of showers in private homes. Given a shower takes 1.5 kWh in order to heat the water and a person takes a shower every other day, the energy used is 0.775 kWh per day.
Heating and cooling the air in a household depends on the climate of the country. Hong Kong has mild to warm temperatures, causing low heating and cooling needs. For heating, it was assumed that winter lasts 3 months, in which a 2 kWh heater ran for 3 hours per day. Given an average house size is 3 people and 365 days in a year; the energy used is 0.5 kWh per day.
Cooling in the summer season (3 months) is controlled by a 0.6 kWh air-conditioner ran for 6 hours per day for the same household size. The energy used is 0.3 kWh per day.
For refridgeration, given 1 unit per house, uses about 0.5 kWh per day.
Cooking, washing clothes, and washing dishes can be approximated using data found in MacKay's text and all sum up to about 10 kWh per day.
All heating and cooling added together, a sum of 13 kWh per day of energy is used.
References: Sustainable Energy- without the hot air, David MacKay
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