The aim of Sustainable Development Action Planning is to improve the efficiency of the organisation.
6 Warm Asphalt Mix Key priority to reduce energy consumption Main use of energy comes from heating bitumen and manufacturing asphalt Desire to get Warm Asphalt Mix (WAM) started in Downer NZ
7 WAM cont’d Warm Mix production is more energy efficient and cost-effective than Hot Mix production Warm Mix asphalt is 20-30 o C cooler than Hot Mix asphalt For Warm Mix production, the bitumen viscosity is reduced to ensure the bitumen coats the aggregate correctly
8 Show me the money… Energy Efficiency: Energy Use Index (Gas) - Hot Mix = 0.335 GJ/tonne Energy Use Index (Gas) - Warm Mix = 0.288 GJ/tonne Difference = 0.047 GJ/tonne Energy Savings (Based on 2008 production levels): Annual Energy Savings (Gas) = 4,223GJ or 1,173,126 kWh per annum Cost Efficiency: Energy Cost Index - Difference = $ 0.584/tonne Cost Savings (Based on 2008 production levels): Annual Savings = $ 52,478 per annum (if all production was Warm Mix)
9 Greenhouse Gas Intensity: CO 2-e Emission Reduction = 0.00246 t CO 2-e / tonne (if all production was Warm Mix)
10 Show me the money… Energy efficiency monitoring and report Grant from EECA Cost to Downer to implement and install Staff time to operate Percentage Warm Mix Production (%) Energy Savings (kWh) Cost Savings ($) Emission Reduction (tCO 2 ) 10%117,313$5,24822.1 20%234,625$10,49644.2 30%351,934$15,74366.3 40%469,250$20,99188.4
11 It’s not just about the money! Safer to use More versatile as it can incorporate higher levels of recycled asphalt Client expectations met Generates fewer greenhouse gases Emits lower levels of fumes, odours, and heat
12 What Else? Driver Training GPS tracking Energy Audits Waste minimisation Water conservation Travel Planning Carbon management GRI reporting Awards and recognition programmes Biggest Loser challenges Working with partners, clients and staff Etc…