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Home Energy Consumption
30 Jan 2008 22:01January 2008:
Electricity: 529 kWh/mo => 1,904 MJ/mo. (1 kWh = 3.6 MJ)
Natural Gas: 93.6 therms/mo => 9,871 MJ/mo. (1 therm = 105.54615 MJ)
= 11,775.6 MJ/mo consumed at my house, or about 392.5 MJ/day. How much is this, exactly?
1 Wh = 3600 J, so 1 Wd = 86,400 J. Therefore, energy flows into my house at about 4.542 kW ALL DAY in January. That's enough for 60 75W light bulbs, 227 CF bulbs (if they consume energy at a rate of 20W to produce the same light as a 75W incandescent), and nearly 4000 LEDs flashlights. Keep in mind, though, that in that time period the average daytime temperature was 37F and I have a new-ish gas furnace. The thermostat cycles between 58 and 65 depending on what time it is.
----
Now, let's look at summer, specifically August 2007:
Electricity: 350 kWh/mo => 1,260 MJ/mo.
Natural Gas: 6.1 therms/mo => 644 MJ/mo.
= 1,904 MJ/mo, or about 63.5 MJ/day. Yes, that's right, in August my energy consumption is the same as electricity consumption in January!
On a summer day, energy flows into the house at an average rate of 735W all day. 9 75W lights, 36 CFs, and probably 700 LED flashlights. Average daytime temperature was 69F.
----
No wonder I pay ~$180 in the winter and ~$50 in the summer.
None of these figures include food for me, energy used at work, or gasoline for the car.
Electricity: 529 kWh/mo => 1,904 MJ/mo. (1 kWh = 3.6 MJ)
Natural Gas: 93.6 therms/mo => 9,871 MJ/mo. (1 therm = 105.54615 MJ)
= 11,775.6 MJ/mo consumed at my house, or about 392.5 MJ/day. How much is this, exactly?
1 Wh = 3600 J, so 1 Wd = 86,400 J. Therefore, energy flows into my house at about 4.542 kW ALL DAY in January. That's enough for 60 75W light bulbs, 227 CF bulbs (if they consume energy at a rate of 20W to produce the same light as a 75W incandescent), and nearly 4000 LEDs flashlights. Keep in mind, though, that in that time period the average daytime temperature was 37F and I have a new-ish gas furnace. The thermostat cycles between 58 and 65 depending on what time it is.
----
Now, let's look at summer, specifically August 2007:
Electricity: 350 kWh/mo => 1,260 MJ/mo.
Natural Gas: 6.1 therms/mo => 644 MJ/mo.
= 1,904 MJ/mo, or about 63.5 MJ/day. Yes, that's right, in August my energy consumption is the same as electricity consumption in January!
On a summer day, energy flows into the house at an average rate of 735W all day. 9 75W lights, 36 CFs, and probably 700 LED flashlights. Average daytime temperature was 69F.
----
No wonder I pay ~$180 in the winter and ~$50 in the summer.
None of these figures include food for me, energy used at work, or gasoline for the car.
