© ABB Stotz-Kontakt GmbH 1 21-Nov-15 KNX and Energy Efficiency Gareth Rowlands ABB LTD

© ABB Stotz-Kontakt GmbH 2 21-Nov-15 KNX and Energy Efficiency Input Output 100 % Potential is not used sufficiently ! 20 %

© ABB Stotz-Kontakt GmbH 3 21-Nov-15 KNX and Energy Efficiency … in Buildings The Challenge: Searching for the lost Energy

© ABB Stotz-Kontakt GmbH 4 21-Nov-15 KNX and Energy Efficiency What's going to drive the future? Legislation - Building Regulations (Low Energy Buildings Class) - Climate Change Levy - Availability of government sponsored grants (Tax relief) Economic Pressure - The simple costs of running a building The Environment - Social consciousness "Naming & Shaming" - Carbon footprint

© ABB Stotz-Kontakt GmbH 5 21-Nov-15 KNX and Energy Efficiency Comfort …. Security … Economy ?? How ? How much ?

© ABB Stotz-Kontakt GmbH 6 21-Nov-15 KNX and Energy Efficiency Case Study: Lighting - the conventional Approach All figures are real figures used for the investment calculation of a new office complex in the United Kingdom. Energy Calculation

© ABB Stotz-Kontakt GmbH 7 21-Nov-15 KNX and Energy Efficiency Case Study: Lighting - the KNX Solution Energy Calculation

© ABB Stotz-Kontakt GmbH 8 21-Nov-15 KNX and Energy Efficiency Assembly Hall + Office: Investment in KNX for Lighting Control with Presence Detection  Connected Load: 91,5 KW  Price per KWH: 0,093 €  Reduction: 45 %  Investment: 106 T€  Saving per year: 8738 €  Return of Investment: 10 years

© ABB Stotz-Kontakt GmbH 9 21-Nov-15 KNX and Energy Efficiency University with Seminar Rooms: Comparision of two Rooms (Energy for Light)

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency University with Seminar Rooms: Comparision of two Rooms (Energy for Heating)

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Efficiency Potential: Lighting Automation FunctionPotential Savings Influencing factors (Positive) Constant Light Control (dimmed according to presence & brightness) %- good natural lighting levels - required light levels > 300 lx - especially in combination with ST (below) Automatic Lighting (switched according to presence & brightness) %- good natural lighting levels - required light levels > 300 lx Sunlight Automatic (blind & shutter positioning) %- good natural lighting levels Sun Tracing (Louvre angle positioning) %- good natural lighting levels - especially in combination with CLC (above) Staircase Lighting (Timed lighting) ?- areas of low usage Source: Energieeffizienz automatisien, LonMark Deutschland e.V. Comparison to reference buildings according to DIN V or prEN 15232

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Efficiency Potential: Heating and Cooling Automation FunctionPotential Savings Influencing factors (Positive) Timed Operating Modes %- continuous operation of heating - low thermal-mass construction Presence %- long absences Window Monitoring %- low thermal-mass construction Free Night Cooling?- fresh air circulation must be possible Peak Load Optimisation?- especially air conditioning Automatic Shading (Temperature controlled shutter positioning blinds) 5%- high natural lighting levels - external shading Timed Shading?- daylight warming - night time warmth retention Source: Energieeffizienz automatisien, LonMark Deutschland e.V. Comparison to reference buildings according to DIN V or prEN 15232

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency  Customers ask ABB: How can KNX help ? Potential for Savings ?  Current Situation: There are some information, sometimes with figures, rarely with fundamental background (… save up to 82 % … ?! …)  Real measurement (e.g. with comparision of buildings) is hardly available (University Bremen)

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency  Conclusion: Common project KNX and Energy efficiency with the university Biberach ABB Stotz-Kontakt Busch-Jaeger Hochschule Biberach  The university Biberach offers study courses in the field of building technology and is already working on the topic energy efficiency in buildings

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency  Project description: Investigation of a KNX-System with typical functions (Lighting, Shutter and blinds, HVAC) with defined conditions (Type of building, different user profiles) regarding possible savings Consideration and calculation of the possible savings based upon DIN V and prEN in combination with existing softwaretools Integration of products from ABB, including measurement of standby losses

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency  Project progress:  Start: November 2007  Finalized by the University Biberach until November 2008  Followed by a preparation of the data for publication (Summary and Presentation)

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency  Objection: Own consumption of the additional devices undo the possible savings  Investigation of the university Biberach  Typical own consumption of a KNX component: app. 200 mW

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Room Temperature Control: conventional … Thermostat Stage 5 - does not work for sure ! Problem: Discipline of the user

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Room Temperature Control: conventional … Thermostat Stage 3 - may be it works ? Problem: Accuracy

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Room Temperature Control: intelligent … It works !

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Room Temperature Control: intelligent… Presence depending Precise

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Room Temperature Control: intelligent … Time depending

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Room Temperature Control: intelligent … Event driven

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency A typical example: Heating - conventional Comfort 20ºC not occupied Afternoon lesson Evening classes Night 16ºC mean room temperature ~ 19.5 ºC Morning lessons 04:00 08:00 12:00 16:00 20:00 Comfort 21ºC School Classroom not occupied

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency A typical example: Heating - according to demand 04:00 08:00 12:00 16:00 20:00 not occupied Afternoon lesson Evening classes Night 16ºC mean room temperature ~ 17.5ºC Morning lessons Comfort 21ºC Standby 18ºC They say: A temperature reduction of 1ºC can mean energy savings of 6%. not occupied School Classroom

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Lighting Control: conventional … Illumination turned on, sun from outside, nobody in the room

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Lighting Control: intelligent … Presence depending Constant Light Control

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Blind control: conventional … Sun is shining, Blinds completely closed, Light on

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Blind Control: intelligent … Sun is shining, Noon, Lamellas horizontal

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Blind Control: intelligent … Sun shines, Afternoon, Lamellas slightly closed

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Blind Control: intelligent … Sun shines, evening, Lamella almost completely closed

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Conjunction of a few Functions:  Winter: Sun shines, no Person present,  Light on, Blinds up, Heating Standby Mode  Winter: Sun shines, Person present,  Licht on, Blinds in Position, Heating Comfort Mode  Winter: Sun does not shine, Person present,  Light controlled, Blinds up, Heating Comfort Mode  Winter (Weekend): Sun does not shine, no Person present  Light off, Blinds down, Heating in Frost Protection Mode

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Conjunction of a few Functions:  Summer: Sun shines, no Person present,  Light on, Blind down, AC Standby Mode  Summer: Sun shines, Person present,  Light on, Blinds in Position, AC Comfort Mode  Summer: Sun does not shine, Person present,  Light controlled, Blinds up, AC Comfort Mode  Summer (Weekend): Sun does not shine, no Person present  Light off, Blinds down, AC off

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Conclusion: An intelligent and energy saving solution e.g. in an office building should be as follows:  Presence Detection  Constant Light Control  Room Temperature Control  Shutter control depending on sun position All in one system  One consistent solution

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Integration of Energy Meter Visualisierung

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency Why measuring electrical Energy ? Save Energy and Costs Inspection of consumers behaviour Consumption becomes transparent Fair splitting of costs Internal billing Detection of “Energy Thieves” Creation of incentives for cost saving Change of consumers behaviour Approach for automation Load management Monitoring of the installation + "If you cannot measure it, you cannot improve it." Lord Kelvin $

© ABB Stotz-Kontakt GmbH Nov-15 KNX and Energy Efficiency