future energy leader’s club lecture 2
TRANSCRIPT
Future Energy Leader’s Club
Online Energy Course for High School Students in Nigeria
Energy Conversion
Energy Conversion
Energy loss in conversion
Energy loss = Energy Input - Energy Output
Concept of energy efficiency
In reality, Efficiency < 100%
Energy Efficiency
Energy Efficiency
• Which would you choose?
Appliance Power rating (W)
Appliance Power rating (W)
Ceiling Fan 100 Well Pump (1/3 – 1 HP)
480-1200
AC 5,000 Laptop 60-250Oven 3,000 Plasma TV 339
Hair Dryer 1,538 Video Game 195Dishwasher 1200-1500 Satellite dish 30
Coffee Machine
1,500 Cell Phone - recharge
0.25 – 0.40
Microwave 1,500 Refrigerator/Freezer
1200 – 1400 Wh/day
Iron 1,100 Computer 120
Energy Appliances (2)• Office space (7.8 kWh/sq ft)• Street lighting (100 W – 250 W)• Flour Mills Plant in Apapa for example, has 11 General Electric
(GE) Jenbacher gas generators at its Apapa Mills, with a combined capacity of 30 MW. It also has a 30 MW diesel plant at the same site as a backup.
Energy Appliances (3)• Roll milling machine (Their
range of power ratings extends from 0.5 MW up to 16.5 MW at speeds of between 20 and 1500 rpm.)
• Cement industry (“The cement industry is the most energy intensive of all manufacturing industries” –EIA 2013) (100-140 KWh/ton of cement)
Ref: Donald I. Bleiwas. Estimates of Electricity Requirements for the Recovery of Mineral Commodities, with Examples Applied to Sub-Saharan Africa, 2011
Energy conservation
• Energy vampires – • Turn-off water, heat, light, etc when not in
use.
Energy AuditName: Abdulbakre Ngozi School:
S/N Appliance Quantity Power rating
Amount of hours used
Total energy
1 Cooker 1 400 W 3 hrs 1200 J (KWh)2 Washing
machine1 500 W 2 hrs 1000 J
3 Electric iron 2 200 W 1 hr 400 J
4 TV 3 140 W 5 hr 2100 J5 Home theatre 1 130 W 5 hr 650 J6 Computer 5 50 W 7 hr 1050 J
Total 6400 J/day