Building automation and control system

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Walter Floyd
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1 Building automation and control system DIN 276: Parts of a BAC system (Cost groups) BAC system Management system (SCADA) Room automation system DDC systems incl. distribution panels Energieeffizienz Raumautomation spega 1

2 Room automation for energy performance DIN 18599: Room automation avoids waste of energy! Emission Distribution Production Direction of energy flow Radiator Heat required? Pipe system/ Mixer Central heating boiler Chilled Ceiling Light required? Pipe system Chiller Only room automation systems can decide wether certain energy emmision is reasonable or not! Luminaire ROOM Cable tray/ Sub distribution Direction of control Room automation (484) DDC system (481/482) Transformer/ Main distribution Energieeffizienz Raumautomation spega 2

3 Room automation for energy performance EN 15232: BAC efficiency classes imply room control Definition of classes Residential Non residential D C B A D C B A AUTOMATIC CONTROL HEATING AND COOLING CONTROL Emission control The Control system is installed at the emitter or room level, for case 1 one system can control several rooms 0 No automatic control 1 Central automatic control 2 3 Individual room automatic control by thermostatic valves or electronic controller Individual room control with communication between controllers Control of distruibution network water temperature (supply or return) Similar function can be applied to the control of direct electric heating networks Fact: Efficiency classes B or A require room automation Energieeffizienz Raumautomation spega 3

4 ZVEI study: Saving potentials in home automation Energy saving potentials through home automation (higher and lower average values of different studies) Source: Energieeinsparpotenzial durch moderne Elektroinstallation (ZVEI/University of Biberach 2008) Energieeffizienz Raumautomation spega 4

5 LonMark study: Room automation saves up to 50%! kwh/m 2 a Hot water Lighting Cooling Heating 60% savings in electrical energy for lighting 45% savings in electrical energy for cooling or AC 0 Office w/o room automation* Office with room automation** * Data source: Reference calculation in LonMark study acc. to DIN V ** Saving potentials according to LonMark study 2007 (University of Biberach) 25% savings in heat energy Energieeffizienz Raumautomation spega 5

6 LonMark study: Saving potentials on lighting energy RA function* Savings** Influencing factors Constant light control (presence-depending) Daylight switching (presence-depending) % -> sufficient daylight provision -> high illuminance level (300lx +) -> most efficient with sun tracking 25 45% -> sufficient daylight provision -> high illuminance level (300lx +) Sunlight control 5 8% -> sufficient daylight provision Sun tracking control % -> sufficient daylight provision -> most efficient with light control Automatic light n.s. -> intermittent presence (e.g. corridors) * see explanations and definitions in spega e.control catalogue (pages 10-15) ** Saving potentials on lighting energy acc. to DIN V and pren compared to EPBD reference building type Energieeffizienz Raumautomation spega 6

7 LonMark study: Saving potentials on thermal energy I RA function* Savings** Influencing factors Mode change-over via time program 5 10% -> long operating time of boiler or chiller -> low building mass Occupancy sensors 5 10% -> longer periods of absence during operating time of boiler and chiller Window monitoring 5 10% -> low building mass Free night cooling n.s. -> air circulation must be possible Summer compensation n.s. -> feasible for all cooling systems Load optimisation n.s. -> feasible for all heating and cooling systems * see explanations and definitions in spega e.control catalogue (pages 10-15) ** Saving potentials on lighting energy acc. to DIN V and pren compared to EPBD reference building type Energieeffizienz Raumautomation spega 7

8 LonMark study: Saving potentials on thermal energy II RA function* Savings** Influencing factors Sunblind thermo control 5% -> sufficient daylight provision -> outside sunblind systems Time program for sunblinds n.s. -> prevents cooling-down during night * see explanations and definitions in spega e.control catalogue (pages 10-15) ** Saving potentials on lighting energy acc. to DIN V and pren compared to EPBD reference building type Energieeffizienz Raumautomation spega 8

Heating / Ventilation / Air Conditioning Room Climate Control with ABB i-bus KNX

Heating / Ventilation / Air Conditioning Room Climate Control with ABB i-bus KNX Content Heating / Ventilation / Air Conditioning 3 The Right Room Climate 4 Optimised Energy Efficiency and well-being Room