Hawker De Havilland, Melbourne Intelligent lighting control with Intelux controllers
Hawker De Havilland Melbourne energy saving Intleux controllers
Background

The Hawker De Havilland plant in Melbourne was chosen by the State Electricity Commission of Victoria as the pilot plant for installation of intelligent lighting control. The intention was to have a project that made use of all possible energy saving factors and at the same set up a control system, transparent and clear for all consumers. The plant is extended over a wide open space, where about 10% of the covered surface is made up of glass, which obviously harvests a considerable amount of daylight.


The solution

First of all the project saw to replacing the mercury vapour lamp with metal halide lamps, without altering the power (400 W) but reducing the number from 1570 to 460. The corresponding installed power dropped from 683 to 200 kW. 93 Intelux source controllers (5,8 kVA 25 A) controllers were installed. The controller series is governed by a CCU placed in the centre of the area to be covered. In response to the signal sent by the photocell sensor (a total of 16 were installed), the CCU continuously varies the artificial lighting level emitted. The predefined lighting level (400 lux) is maintained when the area is occupied, to be then lowered to a pre-set minimum when less light is needed e.g. during the lunch break or during the shift turnover.

Benefits

 

Situations and precedents

New Project

with Intelux

Intelux savings

Total savings
 

(a)

(b)

(c)

(b) - (c)

(a) - (c)

Working hours p.a.

hrs per year

5700

5700

5700

5700

 

Lighting level

lux

 

400

400

400

 

Number of lamps

pezzi

1570

460

460

460

 

Total installed power

kW

683

200

200

200

 

Energy consumption

kWh/year

3.893.100

1.140.000

732.987

407.013

3.160.113

Energy cost (*)

EUR/year

171.296

50.160

32.251

17.909

139.045

Cost of new plant

EUR

 

144.294

144.294

   

Cost of INTELUX system

EUR

   

78.088

78.088

 

Public financing

EUR

 

- 59.334

- 91.282

- 31.948

 

Total net investment

EUR

 

84.960

131.100

46.140

 

Total saving

EUR/year

       

139.045

Payback time

year

     

2,6

0,94


(*) Cost of energy: 0,044 EUR/kWh