Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Backup systems for critical pumping applications - v.31

Six options for providing backup power and operations for critical pumping applications in water and wastewater service

  • Be the first to comment

  • Be the first to like this

Backup systems for critical pumping applications - v.31

  1. 1. Backup Systems for Critical Pumping Applications Brian Gongol DJ Gongol & Associates, Inc. April 18, 2018 62nd Great Plains Waste Management Conference La Vista, Nebraska
  2. 2. Here comes the rain again
  3. 3. If you have to pump, you need backup power
  4. 4. Causes of power outages
  5. 5. Ice storms
  6. 6. System overloads
  7. 7. Routine accidents
  8. 8. Thunderstorms
  9. 9. What happens in a thunderstorm?
  10. 10. I&I (or high combined fows)
  11. 11. You need power most when it's easiest to lose
  12. 12. Six power options
  13. 13. 1. Redundant grid access
  14. 14. 2. Fixed electric generators
  15. 15. 3. Portable electric generators
  16. 16. 4. Fixed engines
  17. 17. 5. PTO
  18. 18. 6. Portable pumps
  19. 19. Storage also matters
  20. 20. Does storage give you time to act?
  21. 21. We'll come back to storage later
  22. 22. Option #1: Redundant grid access
  23. 23. Ten States permits "independent substations"
  24. 24. Power systems very expensive to install
  25. 25. Independent grids, but common threats
  26. 26. How independent can you get?
  27. 27. Ice storms
  28. 28. High winds and hail
  29. 29. High temperatures
  30. 30. All tend to hit a broad geography
  31. 31. A blizzard is never compact
  32. 32. Of no help at all in case of mechanical failure
  33. 33. Requires switching equipment
  34. 34. Option #2: Fixed generators
  35. 35. Common practice to mount at station sites
  36. 36. May be interior or exterior to station
  37. 37. Requires transfer switching
  38. 38. Expensive to install
  39. 39. Not usually integrated with the pump station Affects cost to install and integrate Affects maintenance friendliness (especially if ottdoorsॕ
  40. 40. Security, vandalism, & aesthetic considerations
  41. 41. Sizing risk: You don't want it too small
  42. 42. Sizing risk: You don't want to pay for too much
  43. 43. Often requires a large footprint
  44. 44. Roughly doubles this station footprint
  45. 45. Requires fuel storage or supply
  46. 46. May require spill containment
  47. 47. Requires regular exercise and maintenance
  48. 48. Operates non-stop on power failure Creates non-stop noise Constmes ftel Can create heat and other by prodtcts
  49. 49. May be used to back up other equipment
  50. 50. Option #3: Portable generators
  51. 51. Problem: Travel can be difcult when needed
  52. 52. Sacrifcing manpower at critical times
  53. 53. Can consume a lot of fuel
  54. 54. May require lots of shuttling or babysitting
  55. 55. May be useful for other applications
  56. 56. May need security against theft/vandalism
  57. 57. Can be very loud
  58. 58. May be time-consuming to activate
  59. 59. Requires routine exercise and maintenance
  60. 60. Requires parts, training, and service
  61. 61. Requires storage
  62. 62. Transportation considerations How big? How heavy ? How towable? What kind of skid/wheel kit/trailer?
  63. 63. Fuel may go bad
  64. 64. Not helpful in a lightning strike
  65. 65. Operates non-stop even when pumps don't Not an "efcient" approach in the strict sense of the word
  66. 66. One unit may be useful at many sites
  67. 67. Option #4: Fixed engines
  68. 68. Double-shafted motor with a clutch
  69. 69. Fixed-engine backup confguration
  70. 70. Fixed-engine backup confguration
  71. 71. Fixed-engine backup confguration
  72. 72. Fixed-engine backup confguration
  73. 73. Fixed-engine backup confguration
  74. 74. Fixed-engine backup confguration
  75. 75. Fully integrated unit - no transfer switch
  76. 76. Can use natural gas, LP, or other fuels
  77. 77. Highly compact, fully secure footprint
  78. 78. All O&M conducted indoors; no outdoor work
  79. 79. Buildings can reduce noise
  80. 80. Can be made "neighborhood-friendly"
  81. 81. Single-engine or multiple-engine confgs
  82. 82. Little or no feld wiring required
  83. 83. Usually employs dual AC/DC controls
  84. 84. Battery on trickle charger supplies controls
  85. 85. Engine shuts down when not in use
  86. 86. Tamper-proof and vandalism-resistant
  87. 87. Should be factory-designed and tested
  88. 88. Only option that can be fully factory-tested
  89. 89. Limited to 25' suction lift
  90. 90. Option #5: PTO
  91. 91. Useful in select applications
  92. 92. Handy if tractors are in widespread use
  93. 93. May work mainly with lineshaft pumps
  94. 94. Option #6: Portable pumps
  95. 95. Simple version: Drop hoses in a hole
  96. 96. Better version: Built-in bypass connections
  97. 97. Most complex: Self-contained portable station
  98. 98. Consider noise abatement
  99. 99. Consider fuel storage
  100. 100. Consider fuel choice, too (gas vs diesel)
  101. 101. The pump will need storage, too
  102. 102. Some require babysitting
  103. 103. Some supplied with full control packages
  104. 104. Best if station accommodates quick activation
  105. 105. Least amount of total equipment required
  106. 106. Requires operator time and efort to start REMEMBER: By the time y ot get the call, y ot're probably already in an alarm condition -- and that's before travel time
  107. 107. May have multipurpose use
  108. 108. May be only option for a fooded station
  109. 109. Portable station, semi-permanent placement
  110. 110. Consider transportation issues  Carry in back of a truck?  Lift by hand?  Skid-mounted?  Trailer-mounted?  Highway trailer?
  111. 111. Consider cold-weather operation  Do you want to work on this in the cold?  Will a diesel engine work?  Can you get to every site in a snowstorm?
  112. 112. Reliability is critical: Plan around "PEAT" Ptmp Engine Accessories Transportation
  113. 113. Storage capacity also matters!
  114. 114. A common mistake: Under-sizing the wetwell
  115. 115. Wetwell capacity isn't linear with diameter
  116. 116. 5' of storage in 6' diameter: 1,055 gallons
  117. 117. 5' of storage in 8' diameter: 1,880 gallons
  118. 118. 5' of storage in 10' diameter: 2,937 gallons
  119. 119. A larger wetwell rarely changes O&M costs
  120. 120. But what about the wetwell going septic?
  121. 121. Anti-septic solution #1: Mixers
  122. 122. Anti-septic solution #2: Cyclical aeration
  123. 123. Anti-septic solution #3: Pumping cycles
  124. 124. Anti-septic solution #4: Chemicals/microbes
  125. 125. Overfow basins/storage
  126. 126. Be aware of what's stored in gravity sewers
  127. 127. Hundreds of gallons can be hidden
  128. 128. May cause extraordinary pumpdown times
  129. 129. Also note what's stored in the force main
  130. 130. Not useful for emergency operations
  131. 131. But important to total system operation
  132. 132. To recap  Consider all six options:  Redundant grid access  Fixed electric generators  Portable electric generators  Fixed engines  PTO  Portable pumps  Up-front cost doesn't tell the full story -- at all  Each option has its place
  133. 133. Thanks for your attention Contact ts any time with qtestions Brian Gongol - DJ Gongol & Associates 515-223-4144 brian@gongol.net
  134. 134. Sources  Radar map of March 6, 2017 severe weather from NOAA  Map of March 23, 2018 snowstorm captured from the National Weather Service  Map of derecho event in 2014 from NOAA:  http://www.spc.noaa.gov/misc/AbtDerechos/casepages/jun302014pa ge.htm#  Map of Nebraska power districts from the Nebraska Power Review Board:  http://nprb.gisworkshop.com/  All other photos and illustrations are the original work of the author, the author's company, or Gorman-Rupp  All rights reserved; reproduction prohibited without written consent

×