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