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Modern large office park

 

The office area is approximately 75,000 sq-m with 113,000 sq-m of underground carparks.


Old large office park

 

The office area is approximately 55,000 sq-m with 5,000 sq-m of underground carparks.


Small office building

 

The office area is approximately 4,000 sq-m with 1,000 sp-m of underground carparks.

 

Real World Scenario 3

Office Building (Small)

This facility is located in Rosebank, is approximately 10 years old and was constructed with a mixture of energy efficient energy inefficient lighting throughout the office areas. The office area is approximately 4,000 sq-m with approximately 1,000 sp-m of underground carparks. During the evening the facility is empty barring a skeleton team of security staff and a handful of office staff working over-time.

A complete audit of all floors was conducted and an Electro Sense Proactive Energy Management System™ was designed to control the lights. The system and the savings to be realized are shown below.

System Design Parameters

Number of lighting units:
1,302
Number of lamps/bulbs:
2,055
Number of sensors:
134
Number of watts of switchable lighting:
89,080
Average watts per sensor:
665

Projected Full Client Savings

Number of KWH saved per month:
43,569

Savings at Current 2004 City Power Electric Tariffs:

Total Savings per day:
R476
Total Saving per month:
R14,480
Total Saving per year:
R173,759

Savings at Projected Future City Power Electric Tariffs:

Total Savings over 5 years:
R1,009,837
Total Savings over 10 years:
R2,685,893
Return on Investment:
20 months