Control Functions And Benefits

599 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
599
On SlideShare
0
From Embeds
0
Number of Embeds
5
Actions
Shares
0
Downloads
24
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Control Functions And Benefits

  1. 1. Control Functions and Benefits Eng. Wael Zmerly 08/09/2004 Control Functions and Benefits 1 Albin SAL. – Eng. Wael Zmerly - 2004
  2. 2. Why fit Control ? Control Functions and Benefits 2 Albin SAL. – Eng. Wael Zmerly - 2004
  3. 3. Why fit Control ? - More Comfort More comfort is achieved by: More •Maintaining accurate system temperatures. •Ensuring quiet system operation. •Preventing excessive temperatures on heating surfaces. Comfort •Providing the right amount of heat when and where you want it. Control Functions and Benefits 3 Albin SAL. – Eng. Wael Zmerly - 2004
  4. 4. Why fit Control ? - Energy Saving Energy savings is achieved by: •Minimizing boiler short cycling. Energy •Operating the boiler and the heat distribution system efficiently. Saving •Shutting down the system when no heat is required. •Operating the system at the lowest practical water temperature. Lighting 10% Apliances 20% Heating & Hot Water 70% Control Functions and Benefits 4 Albin SAL. – Eng. Wael Zmerly - 2004
  5. 5. Why fit Control ? - High Quality High quality is achieved by: High •Protecting the boiler from corrosion and thermal shock. •Preventing excessive temperatures in the heating system. Quality •Preventing corrosion and precipitate build up by exercising system components. •Minimizing cycling of equipment. •Providing high quality controls. Control Functions and Benefits 5 Albin SAL. – Eng. Wael Zmerly - 2004
  6. 6. Why fit Control ? - Ease of Use Ease of use is achieved by: Ease of •Providing easy and consistent wiring and installation procedures. •Providing feasible mounting options of enclosures. Use •Providing automatic testing of wiring and detection of sensor faults. •Minimizing manual settings through automatic functions. •Providing visual readouts of system status. Control Functions and Benefits 6 Albin SAL. – Eng. Wael Zmerly - 2004
  7. 7. Boiler Control Constant Boiler Temperature On/Off Differential Constant Boiler Supply Water Temperature Temperature 40 30 20 Outdoor Air Temperature 90 Boiler Differential 70 Outdoor Reset 30 20 Control Functions and Benefits 7 Albin SAL. – Eng. Wael Zmerly - 2004
  8. 8. Boiler Control Expansion Noises Boiler Minimum Supply Supply Water Temperature Normal Operation Supply Temperature Boiler Minum Supply Soft Start 40 Soft Start 30 20 Outdoor Air Temperature Time Boiler Post Purge Control Functions and Benefits 8 Albin SAL. – Eng. Wael Zmerly - 2004
  9. 9. Conmfort Range TOO WARM ZONE Winter Comfort Comfort Range TOO COOL ZONE Conventional Control TOO WARM ZONE TOO WARM ZONE Intelligent Control Wasted Fuel and Discomfort TOO COOL ZONE TOO COOL ZONE Control Functions and Benefits 9 Albin SAL. – Eng. Wael Zmerly - 2004
  10. 10. Thermostatic Radiator Valve Swimming pool Bathroom Work room or children’s bedroom Living or dining rooms (Basic setting) Kitchen, corridor Hobby room, bedroom All rooms at night (nighttime reduction) Stairway, vestibule Basement/cellar rooms (frost protection setting) Control Functions and Benefits 10 Albin SAL. – Eng. Wael Zmerly - 2004
  11. 11. Thermostatic Radiator Valve Installation Correct Correct Circulation of The remote sen- air around the sor enables an thermostatic unhindered head is not reading of the hindered. air temperature in the room. Built-in Underfloor cabinet convector 100 Incorrect Incorrect The thermo- The thermosta- static head tic head with with built-in built-in sensor sensor may may not be not be covered by mounted curtains. vertically. 50 30 3/4” Control Functions and Benefits 11 Albin SAL. – Eng. Wael Zmerly - 2004
  12. 12. Room Thermostat Programmable Thermostat Room Thermostat I nt el l i t her m C55 21°C M S - + + AU T O + PROG COPY DAY AUTO Thermostat installation Wireless Thermostat Control Functions and Benefits 12 Albin SAL. – Eng. Wael Zmerly - 2004
  13. 13. Room Controller Room Controller Room Sensor Room Sensor Controller Thermostat Application Thermostat Application Control Functions and Benefits 13 Albin SAL. – Eng. Wael Zmerly - 2004
  14. 14. Outdoor Reset Heat Out Constant Speed Constant Room Temperature 100 Heat Out Heat Losses = Heat in Heat in Heat in Outdoor Heat Temperature Drop Loss Increase Variable Boiler Temperature Thermostat Setting °C 25 Boiler Temperature °C 24 80 Conventional Control 23 70 22 60 Tolerances 21 50 20 40 19 Outdoor Control 30 18 17 -20 -15 -10 -5 0 5 10 15 20 25 Outdoor Temperature °C Time Control Functions and Benefits 14 Albin SAL. – Eng. Wael Zmerly - 2004
  15. 15. Outdoor Reset Characterized Heating Curve 90 90 70 70 Heating Curve 30 30 20 20 Boiler Temperature Supply Temperature 90 90 70 70 30 30 20 20 Control Functions and Benefits 15 Albin SAL. – Eng. Wael Zmerly - 2004
  16. 16. Outdoor Reset 90 Differential Feedback Supply Water Temperature 80 Supply Water Temperature More Indoor < Setting Heat 70 Indoor Feedback 60 50 Indoor Indoor Sensor Less 40 Sensor Indoor > Setting Heat 30 20 o 25 20 15 10 05 00 C Outdoor Air Temperature Outdoor Air Temperature Required 90 Supply Water Temperature day time temperature 80 Temperature 70 POTENTIAL Optimum Start Night Setback 60 SAVING 50 40 Overnight 30 temperature Delay Period 20 o 25 20 15 10 05 00 C Normal Delayed switch-on time Occupancy/ Outdoor Air Temperature switch-on time with Optimum Start wake-up time Control Functions and Benefits 16 Albin SAL. – Eng. Wael Zmerly - 2004
  17. 17. Outdoor Reset Control Functions and Benefits 17 Albin SAL. – Eng. Wael Zmerly - 2004
  18. 18. Domestic Hot Water Control Yearly Heating Operation for a typical family house (4 persons) 50000 Liters of Hot Water 8000 System Operating Hours 5000 on/off cycles 1000 Burner 0 1 2 3 4 Run Hours bar Control Functions and Benefits 18 Albin SAL. – Eng. Wael Zmerly - 2004
  19. 19. Domestic Hot Water Control DHW Circulation DHW Control Solar Water Heating DHW Priority Control Functions and Benefits 19 Albin SAL. – Eng. Wael Zmerly - 2004
  20. 20. Domestic Hot Water Control Optimum Start DHW Setback DHW Boiler Reset Override DHW Optimization Supply Water Temperature 40 30 20 Outdoor Air Temperature Control Functions and Benefits 20 Albin SAL. – Eng. Wael Zmerly - 2004
  21. 21. Domestic Hot Water Areas of Risk DHW Safe Temperature BATHS 43° C SHOWERS 40° C 40° C WASH ROWS OF ° BASINS BASINS BIDETS KITCHEN SINKS 48° C 37 °C Surviving bacteria inactive rd Death of 90% of bacteria Death of 90% of bacteria Time to produce a 2nd & 3 Instant death of bacteria Optimum temperature for growth of bacteria degree burn to adult Skin: 70°C About 1/2 seconds 65°C About 1-1/2 seconds in 2 minutes in 2 hours Legionella 55°C About 30 seconds Scalding 52°C About 2 minutes 50°C More than 5 minutes 40°C No hazard 0 10 20 30 40 50 60 70 Control Functions and Benefits 21 Albin SAL. – Eng. Wael Zmerly - 2004

×