When deciding on an electric motor
supplier, it’s easy to focus on the purchase price. However, the up-front
payment is a drop in the ocean compared to the motor’s electricity demand over its
10-15 years’ service.
So how do you go about calculating a motor’s operating cost?
We’ve put together a straightforward guide to help, using as an example a 0.55
kW motor with 70% efficiency that runs on average eight hours per day, five
days per week.
1. Take the power of your motor and divide it by its
efficiency for the input required:
0.55 kW / 70% = 0.79 kW (79 W)
2. Calculate how many hours your motor runs for per year:
8 hours per day x 5
days per week x 52 weeks = 2,080 hours
per year
3. Work out the annual energy usage by multiplying the input
power by annual running time:
0.79 x 2,080 = 1,643 kWh hours per year
4. Finally, multiply the annual energy usage by the rate of
electricity (currently around 10 pence per kWh for businesses):
1,643 kWh x 10p = £164.30 annual cost
Assuming your electric motor has a service life of 15 years,
this works out at a total operating cost of £2,464.50 for a machine that cost
around £50-100 to buy - meaning you’re spending up to 50 times the purchase
price on energy. That’s before you even consider the cost of downtime and
maintenance.
There’s a lot to consider, so if you’d like to get an idea
of the best-value electric
motor for your application in the long term, call Sales Manager Paul Scott
on 01621 868138 or email paul.scott@gibbonsgroup.co.uk.
0 comments:
Post a Comment