1. Introduction to Energy Management

2. Week/Lesson 12 Advanced Technology for Effective Facility Control

3. After completing this chapter, you will be able to:  Explain how facility management systems have evolved  State the differences between newer and older technology

4.  Relate energy management features to energy conservation  Understand, in concept, the wide range of computer software, hardware and firmware  Describe how information management features benefit the facility manager and staff Advanced Technology for Effective Facility Control

5. Facility Management Systems (FMS)  Computerized building automation systems  Increase staff productivity  Reduce the structure’s energy consumption  Identify maintenance needs  Manage information Advanced Technology for Effective Facility Control

6. Integrated control – distributed networks  Older systems Headend communicates with remote field gear Headend – monitors and controls processes Field gear – sends signals to headend Advanced Technology for Effective Facility Control

7. Integrated control – distributed networks  Newer systems Direct digital control (DDC) panels Compatible with sensors and actuators Can interface with headends Can operate independently Advanced Technology for Effective Facility Control

8. Integrated control – distributed networks  DDC panels Custom programmed for individual needs Multi-task devices Network Control Units (NCU) Network Expansion Unit (NEU) Advanced Technology for Effective Facility Control

9.  Communication between network devices  Coaxial cable/twisted-shielded pair  Fiber optic cable  Dedicated leased phone lines  Building electric or telephone wiring Advanced Technology for Effective Facility Control

10. Small building systems  Less sophisticated systems are usually desired Smaller building or structure Potential energy savings are small Staff cannot devote time to learning the system Advanced Technology for Effective Facility Control

11. Large facility systems  More equipment can be monitored  Greater distance requirements  Flexible programming  Sophisticated data reporting  Multiple operators Advanced Technology for Effective Facility Control

12. Features for optimal control  Improve building efficiency  Reduce electricity and power usage  Managing HVAC and computer equipment  Managing electric usage (timing) Advanced Technology for Effective Facility Control

13. Optimal Run Time (ORT)  Combine optimal start/stop times  Optimal start time  Turning equipment on at the last possible moment  Comfort is not sacrificed  Optimal stop time (may not be permitted) Advanced Technology for Effective Facility Control

14. Load rolling  Turns equipment off for short periods of time  Reduces overall energy consumption  Minimum on/minimum off times  Only shed expendable loads  Do not shed deferrable loads Advanced Technology for Effective Facility Control

15. Demand limiting  Monitors electrical consumption  Sheds loads in order to balance consumption  Balanced consumption  lower bills  Total consumption + rate of consumption Advanced Technology for Effective Facility Control

16. Economizer switchover  Chooses between outside and return air Dry bulb temperature method Enthalpy switchover – complex but accurate Floating switchover Advanced Technology for Effective Facility Control

17. Supply Air Reset (SAR)  Monitors heating and cooling loads  Adjusts the discharge air temperature  Highest possible cooling air temperature  Lowest possible heating air temperature Advanced Technology for Effective Facility Control

18. Supply water reset (chilled or hot water)  Selects highest possible water temperature (cooling)  Selects lowest possible water temperature (heating)  Comfort is not sacrificed Advanced Technology for Effective Facility Control

19. Condenser water reset  Lowers water to its lowest possible temperature  Determined by Wet bulb temperature of entering air Cooling load on the chiller Advanced Technology for Effective Facility Control

20. Chiller sequencing  Chillers run within their efficiency ranges  Chillers cycle on and off as needed  Chiller run time is also considered Allows for even usage of equipment Prolongs useful life of equipment Advanced Technology for Effective Facility Control

21. Information management features  Summaries Detailed information Specific aspects of the facility  Password Provides security Limited or restricted access Advanced Technology for Effective Facility Control

22.  Alarm reporting Records abnormal activity Set off audible/message alarm  Time scheduling Program events Light/equipment schedules Advanced Technology for Effective Facility Control

23.  Trending Records events at time intervals How areas are effected by processes  Totalization – records the number of times an event occurred  Graphics – provide visual representation Advanced Technology for Effective Facility Control