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Energy Studies: Energy Use and Greenhouse Gas Emission

Energy Use and Greenhouse Gas Emission:
Calculations of Four Electronic Products

Energy is the ability to do work. All of life on earth is powered by solar radiation a fragment of the energy that is emitted from the sun. However, humans only use a small portion of the energy generated by the sun. Since the Agricultural and industrial revolution, our dependence on energy provided by fossil fuel is inevitable. However, with the exponential increase in the human population globally and an increase in the automobile industry as well as other aspects of our lives that are so much dependent on energy provided by oil, coal and fossil fuel we are deem to collapse if proactive measures are not taken immediately to conserve energy and develop efficient and sustainable option for our energy crisis.
The following calculations of four basic household electronic devices that we all use daily provide some evidence why we should now start thinking about energy conservation if we weren’t cautious of these issues before taking this class. As such, the purpose of this paper is to provide detail calculations of energy use for four electronic devices and how over a specific period of time these devices contribute to the release of greenhouse gas in the atmosphere thus leading to climate change and subsequently global warming.
The electronic devices to be considered for this analysis will include an Energy Star Insignia LCD 32” High Definition Television set with total energy consumption rate of 81 watts, an Energy Star Brother DCP 7020 Printer with energy consumption rate of about 75 watts when it is in the ready mode, an Energy Star Samsung Blue Ray Disc Player P3600 with an energy consumption of 65 watts and lastly my Macbook 13” which needs about 25 watts to operate and the battery when fully charged last for about 7 hours.
To calculate the CO2 emission per device I used the electricity (national weighted average including all generation types), which is 1.57 lbs/kWh. In order to calculate the energy use and total cost of the above listed electronic devices the following formula was used, because it best described the items involved in the calculations.
Formula 1: Total Energy Cost (TEC) = Watts * Hours used * Days of the year / 1000 watts * Cost per Kilowatts Hour.

1. Insignia LCD TV:
• Total Energy Cost (TEC) = 81watts * 3hrs * 365 days /1000 watts * $8.32/1kWh= $737.94
• CO2 Emission = 81 watts * 3 hrs * 365 days / 1000 watts * 1.57 lbs/kWh = 139.25 btu per unit of fuel used.
2. DCP Brother Printer:
• Total Energy Cost = 75 watts * 4 hrs * 365 days / 1000 watts * $8.32/1kWh = $911.04
• CO2 Emission = 75 watts * 4 hrs * 365 days / 1000 watts * 1.57lbs/kWh = 171.92 btu per unit of fuel used.
3. Samsung Blue DVD:
• Total Energy Cost = 65 watts * 4 hrs * 300 days / 1000 watts * $8.32/1kWh = $648.96
• CO2 Emission = 65 watts * 4 hrs * 300 days / 1000 watts * 1.57 lbs/kWh = 122.46 btu per unit of fuel used.
4. MacBook Laptop:
• Total Energy Cost = 25 watts * 6 hrs * 180 days / 1000 watts * $8.32/1kWh = $224.64
• CO2 Emission = 25 watts * 6 hrs * 180 days / 1000 watts * 1.57 lbs/kWh = 42.39


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