SmartHome Technologies as a Means to Energy Efficient Buildings. Dr. Nermin Brgulja

Transcription

1 SmartHome Technologies as a Means to Energy Efficient Buildings Dr. Nermin Brgulja

2 Motivation SmartHome Security Comfort Energy Efficiency Welfare Image Source:

3 Motivation Energy consumption US and Europe 2011 Source: U.S. Department of Energy, Buildings Energy Data Book

4 SmartHome: Energy Efficiency in Commercial Buildings

5 Energy Efficiency in Commercial Buildings Energy usage in commercial (office) buildings is influenced by: Building Systems the equipment Building Operations how that equipment is operated Occupant Use how occupants behave in and use the building

6 Energy Efficiency in Commercial Buildings Energy consumption in office buildings depends heavily on employees behavior!

7 pinta: Smart offices with minimal energy consumption Absence time turns to energy saving time!

8 Regular vs pinta office regular office energy-saving functions often not used control at room level time programs for heating zone-based control of lights fixed sensing points one time configuration changes to be applied by experts pinta office automated control of IT devices control at workplace level context-aware control sensors at each workplace individual control of lights and HVAC App for configuration and control

9 pinta: scenario economy mode pre-comfort mode comfort mode

10 pinta in the field Location Duration Nr. User City Hall Bruchkoebel Dec. Feb. 3 pers. Siemens Munich May - July 4 pers. Fraunhofer (IWES) Kassel Feb. - June 1 pers. University of Kassel May - June 2 pers. University of Kassel May - June 1 pers. IdE Kassel May - Nov 4 pers. E.ON Mitte Kassel Oct. Nov. 5 pers. Absence detection techniques: WiFi Bluetooth PIR (passive infrared) Kalender

11 pinta: Evaluation results Absence time... turns to... energy saving time Key factor for potential savings depends on employees behavior Avg. absence time during working hours energy saving potential total work time = f( ) total occupancy time

12 pinta: Evaluation results - City Hall Bruchkoebel Annual energy consumption of an 3 Person office (interpolated) City Hall Bruchkoebel 3 Persons / Workplaces WiFi / GPS Feb.-Dec.

13 SmartHome: Energy Efficiency in Residential Buildings

14 Energy Consumption in Residential Buildings Energy consumption avg. private household in Germany

15 Rule of thumb: Thermal energy savings as a funct. of Temperature Temperaturereduction Energysavings 4%-6%

16 Energy Efficiency in Residential Buildings using SmartHome Controlling local temperature based on user s behavior and needs! Image Source:

17 Controlling temperature based on user s location Adapt home temperature based on the user s presence (distance from home) and time of the day. Temperature defined by user comfort settings. Temp:

18 Controlling temperature based on user s location Temp:

19 Controlling temperature based on user s location Temp:

20 Net energy demand Evaluation results: location-based temperature control Reducing heat supply by 14%-26% when user s location considered Reference Building Test Building Additional reduction up to 7% when weather condition considered TRN-SYS 17 Simulation Apartment (old building) Family Home (old building) Source: Fraunhofer Institute for Building Physics (IBP) Stuttgart

21 Room level temperature control Source: Heizungsjournal 12/2013 (pp 20-23)

22 Source: City of Henningsdorf (Germany) Evaluation results: Room level temperature control Large differences in heat demand among identical apartments: Up to 3 times Reducing heat demand by 8%-15% per apartment when using SmartHome Test building (SmartHome) Building from 1960 Refurbished Floors 110 Appartements Reference building (Without SmartHome)

23 Conclusion

24 Conclusion SmartHome technologies provides significant potential for energy savings in commercial and residential buildings Main focus: Thermal energy savings Electrical energy savings relevant when heat pumps used Major influencing factor: User behavior Large absence times = high energy savings potential Energy savings may significantly vary from case to case User comfort settings, absence times, building etc. SmartHome user survey in Germany: Security and comfort more important than energy efficiency We need sound business models! Increase user acceptance of SmartHome technologies

25 Thank you Nermin Brgulja IdE Institute decentralized Energy Technology Staendeplatz 15 D Kassel Tel.: +49 (0) Fax: +49 (0) Internet: