| Electrical Energy Survey of My Apartment | 1/15/2003 | ||||||||
| Constants | |||||||||
| Line Voltage (V) | 115 | ||||||||
| Energy Cost ($ per Kilowatt-Hour) | $0.06 | ||||||||
| Temperature | 20F | ||||||||
| Category | Rated Current | Measured Current (A) | Measured Current Standby (A) | Measured Power Active(W) | Measured Power Standby (W) | Daily device Usage (Estimated, in Hours) | Daily Energy Requirement (in KiloWatt*Hrs) | Daily Cost of Operation | Notes |
| Computing | |||||||||
| Router/CableModem/10/100 Switch | 1.200 | NA | 138.000 | NA | 24.0 | 3.312 | $0.20 | ||
| Monitor | 1.500 | 0.100 | 172.500 | 11.500 | 10.0 | 1.725 | $0.10 | 1152x864x16.7M, 100Hz | |
| PC (1.7GHz P4) | 5.000 | 0.200 | 575.000 | 23.000 | 24.0 | 13.800 | $0.83 | 3A with HDDs off, 5A max | |
| PC (800Mhz Celeron) | 2.500 | 0.200 | 287.500 | 23.000 | 24.0 | 6.900 | $0.41 | ||
| Printer (HP LaserJet 4P) | 3.500 | 0.500 | 402.500 | 57.500 | 0.0 | 0.000 | $0.00 | Measured while printing | |
| Scanner | 1.25A | 1.250 | 0.200 | 143.750 | 23.000 | 0.0 | 0.000 | $0.00 | |
| Subtotal (Max): | 14.950 | 1.200 | 1719.250 | 138.000 | 25.737 | $1.54 | |||
| Entertainment | |||||||||
| TV | 2.800 | 0.450 | 322.000 | 51.750 | 10.0 | 3.220 | $0.19 | ||
| XBOX | 2.200 | 0.200 | 253.000 | 23.000 | 0.0 | 0.000 | $0.00 | ||
| VCR1 (Sony) | 1.000 | 0.800 | 115.000 | 92.000 | 6.0 | 0.690 | $0.04 | Measured while recording | |
| VCR2 (JVC) | 1.050 | 0.400 | 120.750 | 46.000 | 0.0 | 0.000 | $0.00 | Measured while recording | |
| DVD | 1.000 | 0.200 | 115.000 | 23.000 | 0.0 | 0.000 | $0.00 | ||
| LaserDisc | 0.300 | 0.000 | 34.500 | 0.000 | 0.0 | 0.000 | $0.00 | ||
| Subtotal (Max): | 8.350 | 2.050 | 960.250 | 235.750 | 3.910 | $0.23 | |||
| Cooking | |||||||||
| Microwave 1000W | 8.696 | 12.500 | NA | 1,437.500 | NA | 0.0 | 0.000 | $0.00 | |
| Can Opener | 1.500 | 0.900 | NA | 103.500 | NA | 0.0 | 0.000 | $0.00 | |
| Coffee Maker 4 cup | 5.435 | 4.050 | NA | 465.750 | NA | 0.3 | 0.116 | $0.01 | |
| George Foreman Grill | 12.174 | 9.250 | NA | 1,063.750 | NA | 0.0 | 0.000 | $0.00 | |
| Subtotal (Max): | 26.700 | 3,070.500 | 0.116 | $0.01 | |||||
| Misc | |||||||||
| Cellphone Charger | 0.150 | 0.000 | 17.250 | 0.000 | 24.0 | 0.414 | $0.02 | ||
| Lighting | 1.100 | NA | 126.500 | NA | 10.0 | 1.265 | $0.08 | 2 Rooms, all fluorescent | |
| Clock | 0.043 | 0.043 | NA | 4.945 | NA | 24.0 | 0.119 | $0.01 | |
| Battery Charger | 0.800 | 0.800 | NA | 92.000 | NA | 4.0 | 0.368 | $0.02 | |
| Refrigerator | 3.500 | NA | 402.500 | NA | 24.0 | 9.660 | $0.58 | ||
| Subtotal (Max): | 5.593 | 643.195 | 11.826 | $0.71 | |||||
| Environmental Control | |||||||||
| 20" Industrial Fan #1 | 2.600 | 1.500 | 0.000 | 172.500 | 0.000 | 16.0 | 2.760 | $0.17 | |
| 20" Industrial Fan #2 | 2.600 | 1.500 | 0.000 | 172.500 | 0.000 | 16.0 | 2.760 | $0.17 | Seasonal - only during summer |
| Heat (Nat Gas - fan only) | 1.000 | NA | 115.000 | NA | 24.0 | 2.760 | $0.17 | Doesn't include Nat Gas Costs | |
| Heat (1500W Electric) | 13.043 | NA | 1,500.000 | NA | 24.0 | 36.000 | $2.16 | Emergency use only | |
| AC Small Window Unit | 10.435 | NA | 1,200.000 | NA | 24.0 | 28.800 | $1.73 | ||
| Subtotal (Max Required) | 16.043 | 1,845.000 | 41.520 | $2.49 | |||||
| Subtotal (Average Summer) | 13.435 | 1,545.000 | 34.320 | $2.06 | |||||
| Subtotal (Average Winter) | 2.500 | 287.500 | 5.520 | $0.33 | |||||
| Conclusions | |||||||||
| Total (Standby) | 373.750 | 24.0 | 8.970 | $0.54 | This does not factor in daily usage, so it is higher than would be experienced with daily usage - this represents power when everything is off, like when I'm on vacation. | ||||
| Total (Max Power Required) | 71.636 | 8,238.195 | 83.109 | $4.99 | This factors in daily usage, so it may be lower than other totals. | ||||
| Total (Avg Summer) | 69.028 | 7,938.195 | 75.909 | $4.55 | This factors in daily usage, so it may be lower than other totals | ||||
| Total (Avg Winter) | 58.093 | 6,680.695 | 47.109 | $2.83 | This factors in daily usage, so it may be lower than other totals | ||||
| Yearly Total | 63.560 | 7309.445 | 61.509 | $3.69 | This factors 6 mos summer, 6 mos winter | ||||
| Total (Emergency in Winter) | 16.093 | 1850.695 | Factors here are communications, server, refrigeration, lighting at night. Turn off TV when Monitor is on and VV. Heat and cook with Propane stored in 20lb bottle. Size a quiet generator based on this. | ||||||
| Total (Emergency in Summer) | 15.093 | 1735.695 | Factors here are maintaining a fan, communications, server, refrigeration, lighting at night. Cook with Propane stored in 20lb bottle. Turn off TV when Monitor is on and VV. | ||||||
| Conversion Factors | |||||||||
| Volume | |||||||||
| 1 gal = 0.00378541m^3 | |||||||||
| 1 ft^3 = 0.02831685 m^3 | |||||||||
| 1 m^3 = 35.3146 ft^3 | |||||||||
| 1 gal = 0.133680 ft^3 | |||||||||
| Energy | |||||||||
| 1 cal = 4.186 J | |||||||||
| 1eV = 1.6E-19 J | |||||||||
| 1KWH = 3.6E6 J | |||||||||
| 1 BTU = 1.054E3 J | |||||||||
| 1 J = 1 W*sec | |||||||||
| Power | |||||||||
| 1W = 1J/sec | |||||||||
| 1 BTU/hr = 0.293W | |||||||||
| 1 BTU = .293 W*hr | |||||||||