Energy efficiency

Business

Below are a few simple examples of how businesses can save through better management of their energy usage in the work place.

Lighting

Replace your 100 incandescent light bulbs with Compact Fluorescent Lamps

Payback in 4 months and then save 70% on your lighting costs from then on.

100 x 27W CFLs

100 x 100W
incandescent

First time costs

$700

$100

Annual replacement costs

$154 (22% replaced each yr)

$200 (all replaced twice a yr)

Annual Energy cost

$768

$2847

Total Annual Cost

$922

$3047

Annual Savings

$2125

Assumes: 6Hrs/day @ 13c/kWh

Hot water

Much of the heat lost from the heating of water is through poorly insulated water pipes and tanks.

Costs ($)
incl. materials and labour

Savings ($/yr@
13 c/kwh)

Simple payback

Hot water cylinder wrap*

$70-$120

$22-$80

1-5yrs

Hot water pipe wrap*

$5-$20

$16

4-8 months

*Source EECA

Office Equipment

A regular PC takes around 120W to run (laptops and flat screen monitors are more efficient).

This is around 2.88kWh used in a 24 hour day.

If you had 20 PCs running over a 24hr period you would use 57kWh.

Using an energy cost of 14 cents per kWh we have worked out a saving that can be easily made by simply turning off your PC’s when they are not being used.

Figures based on 20 PC’s

Savings ($)

Weekend period (48hrs)

$15.96

52 weekend periods

$829.92

Air Compressors

Optimising compressed air systems can provide energy-efficiency improvements of 20-50%

A 500 kPa compressed air system operating at 1500 hrs per year has a single hole of between 1-3mm in size. Repairing this leak will save around $272 per year and a tonne of CO2.

Source:

www.mercury.co.nz

Further information:

See: www.mercury.co.nz