Energy efficiency and the use of 100% renewable energy sources

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Lipor, while public agent of change of behaviour, in operational management, is committed to promoting efficient management to develop strategic plans for energy as part of a broader goal of sustainable development. Energy efficient planning, allows to optimize the provision of services by improving the quality of life of citizens, who have access to LIPOR facilities, as for the cost reduction in energy usage, either by reducing emissions of greenhouse gases (GHG), increasing economic competitiveness.
Lipor, while producer and agent GEE Manager, took over, as part of its strategy, the EU objectives:

-20% reduction of GHG emissions;
-20% increase in the use of renewable energy sources;
-20% increase in energy efficiency, until 2020.

In order to comply with the objectives laid down by the EU, Lipor has implemented internally, a Sustainable Shopping Strategy that aims in the medium term, to introduce sustainability criteria in procurement procedures. The increase of energy efficiency, the use of renewable energy sources (RES), the reduction of GHG emissions and the Life cycle costs (LCC), were the main criteria in the preparation of the following purchasing procedure:

• Multifunction equipment rental of low carbon (DMF), and;
• purchase of electricity produced from 100% renewable sources of energy.

Assumptions

Low carbon multifunction equipment rental (MFD)

• Multifunction equipment rental (MFD and printers), including technical assistance and maintenance;
• Equipment: 14 multi-function equipment, divided into 4 types;
• Contract duration: 36 months.

Purchase of electricity produced from 100% renewable energy sources

• Estimated electricity consumption: 1,300,000 kWh/year;
• Contract duration: 1 year with the possibility of 1-year extension.

Results

Low carbon multifunction equipment rental (MFD)

• 45% savings in energy consumption and CO2 emissions;
• About € 438 savings in electricity costs during the period of 3 years.


Energy consumptionCO2 emissions
Comparison with Energy Star 2.02791.2 kWh/year1.43 tCO2/year
Acquisition contest1511.9 kWh/year0.79 tCO2/year
Savings/year1279.3 kWh/year0.64 tCO2/year
Savings/life time (rental period)3837.9 kWh1.93 tCO2

 
The estimates were made by Typical Energy Consumption information (TEC) available at www.eu-energystar.org/products.htm.
Energy consumption and CO2 emissions were compared with the maximum power consumption defined in Energy Star certification.

Purchase of electricity produced from 100% renewable energy sources

• Saving of 488 tCO2 in the period of 1 year;
• 96% savings in CO2 emissions;
• Savings on about € 9,000 in electricity costs over the period of 1 year.


Energy consumptionCO2 emissions
Comparison with Mix of electricity with 30% FER1,300,000 kWh/year510.1 tCO2/year
Electricity Acquisition contest 100% FER1,300,000 kWh/year22.1 tCO2/year
Savings/year€ 9,000/year488 tCO2/year

 

CO2 savings were calculated using the calculator GPP 2020 for the power supply.

Based on the mix of electricity from leading vendors, recorded for the past few years (2011-2014), has been set a term of comparison as the lowest value of renewables on the market (32%). It is composed by:

• 68% conventional electricity = 884,000 kWh
• 32% electricity FER = 416,000 kWh.

The emission factor for electricity conventional (non-renewable sources) was calculated: 0569 kg CO2/kWh (average value for 2011-2013 – source: www.erse.pt). For 32% of RES electricity, we used the emissions calculator factor GPP 2020:0.017 kg CO2/kWh.

Learned lessons

The main success factors of this new approach, are based on wide consultation to the market before the purchasing procedure, allowing the presentation of new solutions more advantageous prices.

Although the set of equipment had to comply with the latest Energy Star specifications, less 10%, the difference between the winning bid and the maximum set in the competition was 62% lower, showing that we can go beyond Energy Star for more energy-efficient equipment. This learning will be taken into account in future purchasing procedures.

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