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Analysis of Chilled Water System

Analysis of Chilled Water System. Presented by 鴨子. Outline. Introduction to Chilled Water System Motivation Outdoor Temperature Classification Analysis of Power Consumption for Three Hosts Analysis of Chilled Water Leaving Temperature Conclusion Future Work. 賴先生. Outline.

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Analysis of Chilled Water System

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  1. Analysis of Chilled Water System Presented by 鴨子

  2. Outline • Introduction to Chilled Water System • Motivation • Outdoor Temperature Classification • Analysis of Power Consumption for Three Hosts • Analysis of Chilled Water Leaving Temperature • Conclusion • Future Work

  3. 賴先生

  4. Outline • Introduction to Chilled Water System • Motivation • Outdoor Temperature Classification • Analysis of Power Consumption for Three Hosts • Analysis of Chilled Water Leaving Temperature • Conclusion • Future Work

  5. Introduction to Chilled Water System

  6. NTU CSIE Chilled Water System

  7. NTU CSIE Chilled Water System

  8. Specification of Chilled Water System • 冰水主機： 187 kW • 冰水泵浦： 11.2 kW • 冷卻水泵浦： 22.5 kW • 區域泵浦*2： 30 kW • 冷卻水塔： 7.5 kW • Total： 258.2 kW (視在功率)

  9. Power Consumption of Chilled Water System

  10. State of Chilled Water System 1RT是將1噸0℃的冰溶化為0 ℃的水 所吸收的熱量 (Kcal/hr or Btu/hr) • Full load(全載,滿載) 240RT(refrigeration ton) 380V , 320A (181kW) • Light load(輕載,基本載) 80RT 380V , 130A (72.7kW) • Stop(待機,停機) 0RT 0V , 0A → but it never happened……

  11. State of Chilled Water System • Example : chilled water leaving temperature 7℃ • chilled water leaving temperature of next time: 9 ℃ → Full load 6.5 - 9 ℃ → Light load – Full load about 6 ℃ → Stop

  12. Electric Meter of NTU CSIE

  13. 校園電力監視系統

  14. 校園電力監視系統

  15. Outline • Introduction to Chilled Water System • Motivation • Outdoor Temperature Classification • Analysis of Power Consumption for Three Hosts • Analysis of Chilled Water Leaving Temperature • Conclusion • Future Work

  16. Motivation Thepower consumption of chilled water system takes 40%~50% of all power consumption, but…… 假日 vs. 上課日 : 整天差571.5度 假日只比非假日省了6% 天冷 vs. 天熱 :  整天差 588 度 天冷時只比天熱時省了 6.78% 凌晨 vs. 正常時段 : 一小時平均差59度 凌晨時段只比有人時段省了14.17%

  17. Motivation • In these cases, we observe that chilled water system makes a big waste and some people feel very cool. • We want to adjust the chilled water leaving temperature to save the energy and let everyone feeling comfortable.

  18. Outline • Introduction to Chilled Water System • Motivation • Outdoor Temperature Classification • Analysis of Power Consumption for Three Hosts • Analysis of Chilled Water Leaving Temperature • Conclusion • Future Work

  19. Why Classify the Outdoor Temperature ? • Under similar outdoor temperature conditions, comparing the power consumption between two days.

  20. Outdoor Temperature Classification • Source of Weather’s Data : • 台灣大學大氣系 • 中央氣象局

  21. Outdoor Temperature Classification Max. Min. Avg. temperature of a day DATA (unit :minute) Parse_day.cpp Avg. temperature of an hour Parse_hour.cpp Classify.cpp Classification

  22. Classify.cpp C :1 CM :2 M :3 MH :4 H :5 CH :6 CMH :7 Cold : % Mid : % Hot : % 24hour threshold : 20, 26 Classification

  23. Classify.cpp • C, M, H : • E.g. : (2, 18, 4) where (C, M, H) →M • CMH : • E.g. : (7, 9, 8) where (C, M, H) →CMH • CM ,MH ,CH : • E.g. : (11, 9, 4) where (C, M, H) →CM • E.g. : (11, 0, 13) where (C, M, H) → CH

  24. Weather Classification

  25. Outline • Introduction to Chilled Water System • Motivation • Outdoor Temperature Classification • Analysis of Power Consumption for Three Hosts • Analysis of Chilled Water Leaving Temperature • Conclusion • Future Work

  26. Analysis of Power Consumption for Three Hosts

  27. Analysis of Power Consumption for Three Hosts

  28. Analysis of Power Consumption for Three Hosts

  29. Outline • Introduction to Chilled Water System • Motivation • Outdoor Temperature Classification • Analysis of Power Consumption for Three Hosts • Analysis of Chilled Water Leaving Temperature • Conclusion • Future Work

  30. Schedule of Chilled Water Leaving Temperature

  31. Analysis of Chilled Water Leaving Temperature

  32. Analysis of Chilled Water Leaving Temperature

  33. Analysis of Chilled Water Leaving Temperature

  34. Schedule of Local Pump GPM : Gallon per minute • before 4/28(三) 1館: auto 2館: auto • 4/28(三)16:30 1館: 強制變頻30%(29gpm) 2館: 強制變頻60%(150gpm) • (5/03(一)1館5F陳教授反應太熱<5F 1館館線末端> ) 5/03(一)15:30 1館: 強制變頻40%(46gpm) 2館: 強制變頻50%(96gpm) • 5/08(六)21:00 1館: 強制變頻60%(80gpm) 2館: 強制變頻50%(80gpm)

  35. Outline • Introduction to Chilled Water System • Motivation • Outdoor Temperature Classification • Analysis of Power Consumption for Three Hosts • Analysis of Chilled Water Leaving Temperature • Conclusion • Future Work

  36. Conclusion • Host_3 spends less electricity than host_1, host_2 →Increase its work time! • Adjusting the chilled water leaving temperature can decrease the cost of electricity. • The rotation rate of local pump may have a big influence on chiller system’s cost.

  37. Outline • Introduction to Chilled Water System • Motivation • Outdoor Temperature Classification • Analysis of Power Consumption for Three Hosts • Analysis of Chilled Water Leaving Temperature • Conclusion • Future Work

  38. Current Work • From Chiller System - peripherals - chilled water leaving temperature - monitor

  39. Future Work • From Chiller System - peripherals - chilled water leaving temperature - monitor • From User

  40. Experiment • Seminar Room • Teaching Room • Professor Room • LAB • Open the AC controller of all • Seminar Room & Teaching Room • at 6:00am - 8:00am

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