Energy Consumption Formula

The utilization of a program’s energy through using supplies is referred to as energy consumption. Giga Joules per year, kilograms of oil equivalent per year (kg/a), and Watts are used to calculate the said amount of consumption.

Formula

E_c = Pt/1000

where,

• E_c is the energy consumed in kWh
• P refers to the power in Watts
• t refers to time

Sample Problems

Problem 1. Calculate the energy consumed by an engine that consumes 200 W power while working for 4 hours.

Solution:

Given: P = 200 W and t = 4 hours

Since E_c = Pt/1000

= 200 × 4 × 60 × 60/1000

= 2880 kWh

Problem 2. Calculate the energy consumed by an engine that consumes 150 W power while working for 2 hours.

Solution:

Given: P = 150 W and t = 2 hours

Since Ec = Pt/1000

= 150 × 2 × 60 × 60/1000

= 1080 kWh

Problem 3. Calculate the energy consumed by an engine that consumes 120 W power while working for 2 hours.

Solution:

Given: P = 120 W and t = 2 hours

Since Ec = Pt/1000

= 120 × 2 × 60 × 60/1000

= 864 kWh

Problem 4. Calculate the energy consumed by an engine that consumes 120 W power while working for 2 hours.

Solution:

Given: P = 120 W and t = 2 hours

Since Ec = Pt/1000

= 120 × 2 × 60 × 60/1000

= 6624 kWh

Problem 5. Calculate the energy consumed by an engine that consumes 90 W power while working for 3 hours.

Solution:

Given: P = 90 W and t = 3 hours

Since Ec = Pt/1000

= 90 × 3 × 60 × 60/1000

= 972 kWh