Energieffektiviserande åtgärderpå Robertsfors VA-nät
En förstudie av vilka energieffektiviserande åtgärdersom kan göras på pumpstationer och reningsverk
The objective of this work was to introduce measures to reduce energy and water demand at Gävle Söder 17:10. To succeed, this energy audit has been made. The work is based on collected statistics from the property owner Norrporten, measurements, literature review and through consultation with experts in the field. Two models, one for each building, have been created in the simulation program BV2 to estimate the potential of energy measures based on the collected information. The models in BV2 have been verified against the statistics of the energy consumption.With the help of calculations and simulations, seven cost-effective measures have been identified. This involves replacement of a ventilation unit, installation of low-flow nozzles and better management of the mechanical chiller. Overall, the measures are expected to reduce heating requirements by 223 MWh/year (17%) and reduce electricity demand by 66 MWh / year (5%). Additionally, the water demand can decrease by 609 m3 (12%). The total costs are estimated to decrease by 143,000 SEK per year, excluding VAT, with a payback period for the investment of 3.9 years. The proposed measures also contribute to reducing emissions by 4.16 tons CO2/year or 8.61 tons CO2/year, depending on whether emissions for electricity is based on the Swedish or Nordic electricity mix.