Case Study (49 Kb PDF)

Summary

In 2005, the Pilot Project "Green Light Graz I" (modernizing street lighting along the main traffic route Wienerstraße - Gürtel and other main streets) was started. 718 lamps in main streets were renewed and provided with state-of-the art technologies and control engineering. The Graz Energy Agency has taken over the whole project handling for contract management as an overall package by order of the City of Graz. As for technical implementation and financing, the Graz Energy Agency co-operates with Energy Graz. Together these two organizations guarantee the calculated energy savings! The costs are amortized by the savings. No additional investment costs accrue to the City of Graz. On April 26, 2006, the City of Graz was presented with the Green Light Award 2006 in Frankfurt for its programme!

Results

The energy savings

Lighting hours:	4161 hours
Power consumption before the measures:	905,766 kWh
Energy savings € guaranteed!	524,000 kWh (- 58 %)
Energy savings, actual:	533,100 kWh (- 59 %)
Savings of energy costs:	67,200,- €/year

This means the guaranteed savings are even exceeded. The additional savings to the amount of € 2,000.- are for the benefit of the City of Graz .

The cost savings

Costs and savings for the City of Graz per year:

	up to now	contracting period	After the end of term
Energy costs Contracting rate	112,790.-	45,590.- 36,567.-	45,590.-
Total costs	112,790.-	82,166.-	45,590.-
Savings, City of Graz		30,624.-	67,200.-

Thanks to the Thermoprofit Model, the budget is immediately relieved by approx. € 30,000.- a year. After 15 years, the full saving to the amount of at least € 67,200.- is for the profit of the City of Graz