Given • 1 million people in Hong Kong using low-flush toilet and low- flow shower head. • 1 million leaky toilet and Faucet. Energy needed to treat water Average energy use for water treatment drawn from southern California studies is 652 kWh per acre-foot (AF), where one AF = 325,853 gallons. Thermal Energy in Coal The thermal power plants consume about 0.45 kg of coal per kWh. Energy output/fire power plant A typical 500 megawatt coal power plant produces 3.5 billion kWh per year. CO2 Emission Taking coal to contain 50 percent carbon, which combines with oxygen during burning to form CO2, we can arrive at 1.83 kg CO2 for every 1 kg of coal burned. Find 4. How many African children (1 liter/kid/day) we can support?
Given
• 1 million people in Hong Kong using low-flush toilet and low-
flow shower head.
• 1 million leaky toilet and Faucet.
Energy needed to treat water
Average energy use for water treatment drawn from southern California
studies is 652 kWh per acre-foot (AF), where one AF = 325,853 gallons.
Thermal Energy in Coal
The thermal power plants consume about 0.45 kg of coal per kWh.
Energy output/fire power plant
A typical 500 megawatt coal power plant produces 3.5 billion kWh per year.
CO2 Emission
Taking coal to contain 50 percent carbon, which combines with oxygen during
burning to form CO2, we can arrive at 1.83 kg CO2 for every 1 kg of coal
burned.
Find
4. How many African children (1 liter/kid/day) we can
support?
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