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Eco-Factor design method. Åsa Wahlström SP Swedish National Testing and Research Institute Henrik Brohus Aalborg University. 4 th Annex 44 Forum / TORINO / 29 march 2006. Outdoor environmental impact. Effective energy use (cost). The performance of the building – a question of system.
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Eco-Factor design method Åsa WahlströmSP Swedish National Testing and Research InstituteHenrik BrohusAalborg University 4th Annex 44 Forum / TORINO / 29 march 2006
Outdoor environmental impact Effective energy use (cost) The performance of the building – a question of system Adequate Indoor climate(gain) Åsa Wahlström
Difficult to overview the impact of the environment Use of electricity, heating and cooling Gain in indoor climate Overall thermal balance CO CO2 NOx Radiant temperature asymmetry IAQ Particles SOx Local discomfort N2O Vertical temperature gradient NMVOC Draught NH3 CH4 Warm or cold floors Åsa Wahlström
Objective -to develop a method that assists in interpretation and evaluation of the performance of different system solutions Client Architect Builder Åsa Wahlström
Interdisplinary development of a new simple tool Åsa Wahlström
Eco-factor for indoor climate • IAQ • Thermal comfort • Overall thermal comfort • Local thermal comfort • Draught • Air temperature gradient • Radiant temperature asymmetry • Warm/cold floors Åsa Wahlström
100% Eco-factor • Minimum percentages dissatisfied (ISO 7730) • 50% Eco-factor • Medium level of expectations (CR 1752, Case B) Score-function for indoor climate Åsa Wahlström
Eco-factor for energy use • Energy use for each energy source • Emissions from each energy source • Impact: Established environmental • assessment methods • (EPS, Eco-indicator 99 etc.) Åsa Wahlström
100% Eco-factor • - No emissions • 25% Eco-factor - Emissions from an average European office Score-function for energy use Åsa Wahlström
Eco-factor for visualization of performance Åsa Wahlström
Input, Eco-factor Tool, 1 Åsa Wahlström
Input, Eco-factor Tool, 2 Åsa Wahlström
Output, Eco-factor Tool, 1 Åsa Wahlström
Output, Eco-factor Tool, 2 Åsa Wahlström
We find the ”missing” points in the IP Example B&O headquarter Åsa Wahlström
Alternative Energy Source ( 9 %) Åsa Wahlström
Total Eco-factor = 60 % Indoor climate Energy • Spreadsheet based tool, • Easily accessible in practise • Both energy use and indoor climate • Relatively quickly provide an visual presentation • Easy to understand and communicate with one common scale • Based on physical indicators and evaluation methods that are already well-known and recognized in the building community Conclusions Åsa Wahlström
Total Eco-factor = 60 % Energy Indoor climate • Supports an iterative procedure, useful for “integrated design” • Immediate feedback on design changes • Communication: experts vs. non-experts • Ranking of solutions • Encourage a comprehensive view Conclusions Åsa Wahlström