Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER DU-107-PP

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  PURPOSE  The purpose of the Operations and Maintenance Training Program is to train Operations and Maintenance Technicians in the operation of the Duke University Chiller and Steam Systems.  OBJECTIVES  Trainees will demonstrate knowledge of – Chilled Water Plant #2 (CHWP-2) Reclaim Water System Components – CHWP-2 Reclaim Water System Components Operation – CHWP-2 Reclaim Water System Configuration – CHWP-2 Reclaim Water System Controls and Instrumentation

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  PURPOSE  The purpose of CHWP-2 Reclaim Water is to: – Reduce dependence on City of Durham water – Reduce costs – Reduce impact on the environment – Prevent loss of services during drought conditions

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  CHWP-2 RECLAIM WATER SYSTEM  Reclaimed water supplies the CHPW-2 cooling tower basin. Reclaim water comes from: – Air Handler Unit (AHU) cooling coil condensate – Wells – Creek – Storm drainage system and reclaim pond – Rainwater  The Control Room controls distribution of reclaim water to the cooling tower basin and irrigation system.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  WHY RECLAIM WATER?  In 2007 drought conditions in Durham NC reached record low levels in water supplies. Duke helped lead the response.  Duke University growth from 2006 – 2010 of 7.4%.  Central Chiller System load increase from 2005 – 2010 of 60%.  Duke University is the largest user of water in the City of Durham.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  At 30% of all water used, the Chilled Water System is the largest single consumer of water at Duke University.  CHWP-2 can use 100 million gallons of water per day.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  HOW DUKE HAS RESPONDED  October 2007, Duke University convened Water Conservation Steering & Working Groups, which analyzed all potable water use on campus.  In 2009 CHWP-2 underwent major renovation, resulting in Leadership in Energy & Environmental Design (LEED) Gold certification

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  The reclaim water project supports the Governor Deval L. Patrick of North Carolina’s “Leading by Example” initiative (Executive Order 484).  As of 2010, 43 million gallons of water per year have been saved.  When the Reclamation Pond is completed, an additional 100 million gallons of water per year will be saved.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  RECLAIM WATER PRINCIPLES  Reclaimed water is used for makeup feedwater and irrigation.  The CHWP-2 Reclaim System – Reduces reliance on City of Durham water – Saves money – Reduces waste and impact on the environment

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  Water from the following sources is distributed through the CHWP- 2 Reclaim Water System: – AHU cooling coil condensate – Two Wells – Creek – Storm Drainage System with Reclaim Pond(being constructed in- stream during 2014) – Rainwater collected from the CHWP-2 rooftop

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  How much of all water used at Duke is consumed by the Chilled Water System? – 9% – 15% – 30% – 25%

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  30% of all water used on campus is consumed by the Chilled Water System.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  What Gold level certification has CHWP-2 been awarded? – EPA – LEED – Malcolm Baldrige – NOA

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  In 2009 CHWP-2 underwent major renovation, resulting in LEED Gold certification

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  What was the percentage of growth for Duke University from 2006 to 2010? – 14.7% – 17.4% – 7.4% – 4.7%

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Duke University grew by 7.4% between 2006 and 2010.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  The reclaim water project supports which initiative of the Governor of North Carolina? – Leading by Example – Keep North Carolina Green – Water Conservation Initiative – Esse Quam Videri

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  The reclaim water project supports the Governor of North Carolina’s “Leading by Example” initiative.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  What is LEED an acronym for? – Land Environment Ecology Designation – Leading Ecologists to Energize our Destination – Leadership in Ecology and Energy Design – Leadership in Energy and Environmental Design

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Leadership in Energy and Environmental Design

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  PURPOSE  Systems that make up the CHWP-2 Reclaim Water System efficiently and responsibly supply water for: – The CHWP-2 Cooling Towers basin to help cool the basin and provide makeup feedwater – Irrigation on campus

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  SYSTEM COMPONENTS  The Duke University CHWP-2 Reclaim Water System includes the following equipment and locations: – Reclaim Water Supply – Reclaim Water Tanks – Reclaim Pumps – CHWP-2 Cooling Tower Basin – Irrigation System

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  RECLAIM WATER SUPPLY  Creek and Wells  AHU Cooling Coil Condensate  Storm Water  Reclamation Pond  Rainwater

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  CREEK AND WELLS  Reclaiming creek water saves 22 million gallons per year.  Two wells save 1.5 million gallons per year

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  AHU COOLING COIL CONDENSATE  Reclaiming condensate from air handler cooling coils saves 15 million gallons per year. CONDENSATE DRAIN

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  STORM WATER  Storm water runoff is collected in the storm drainage system.  The storm drainage system consists of nearly 32 miles of storm pipes and drainage ditches.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  RECLAMATION POND  The storm water reclamation pond is being constructed in-stream of the storm drainage system.  The pond will save approximately 100 million gallons of water per year.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  RAINWATER  Rainwater is collected from the CHWP-2 roof and piped to the Reclaim Tanks in the basement.  Rainwater collected from campus buildings saves 9 million gallons per year.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  What does reclaim water do in the cooling tower basin? – Cools the basin and provides makeup feedwater – Preheats water in the basin and provides makeup feedwater – Reclaim water is not supplied to the basin – Rinses old feedwater from the basin and provides makeup condensate

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Reclaim water cools the basin and provides makeup feedwater.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  How many millions of gallons of water may be saved annually by the reclamation pond? – 22 – 100 – 15 – 60

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  The reclaim pond will save approximately 100 million gallons of water per year.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  Approximately how many miles of storm pipes and drainage ditches are in the storm drainage system? – 100 – 25 – 32 – 17

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  The storm drainage system consists of nearly 32 miles of storm pipes and drainage ditches.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  How many millions of gallons of water are saved by reclaiming rainwater? – 7.4 – 22 – 9 – 14

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Rainwater collected from campus buildings saves 9 million gallons per year.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  How many millions of gallons of water are saved by reclaiming creek water? – 7.4 – 22 – 32 – 1.5

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Reclaiming creek water saves 22 million gallons per year.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  How many millions of gallons of water per year can be saved by r eclaiming condensate from AHU cooling coils? –22 –32 –9 –15

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Reclaiming condensate from air handler cooling coils saves 15 million gallons per year.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  RECLAIM WATER TANKS  Reclaim Water Tanks 1 and 2 are located in the basement of CHWP-2.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  RECLAIM PUMPS  Reclaim Pumps P1 and P2 are located next to the Reclaim Water Tanks.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  RECLAIM PUMP CONTROLS  Manual controls for Reclaim Pumps P1 and P2 are located to the right of the pumps.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  COOLING TOWER BASIN  The cooling tower basin is located below the cooling towers. EAST CAMPUS STEAM PLANT

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  IRRIGATION SYSTEM  Reclaim water reduces or eliminates reliance on City of Durham water for landscape irrigation. EAST CAMPUS STEAM PLANT

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  Where are the Reclaim Water Tanks located? – Below the cooling towers – Outside CHWP-2 – Control Room – Basement of CHWP-2

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  Answer  Reclaim Water Tanks 1 and 2 are located in the basement of CHWP-2.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  Where are the Reclaim Pumps located? – Below the cooling towers – Control Room – Next to the Reclaim Water Tanks – Mezzanine

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Reclaim Pumps P1 and P2 are located next to the Reclaim Water Tanks.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  Where are the manual controls for the Condensate Reclaim Pumps located? – Below the cooling towers – To the right of the pumps – Control Room – Outside CHWP-2

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Manual controls for the Condensate Reclaim Pumps P1 and P2 are located to the right of the pumps.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  CHWP-2 RECLAIM WATER CONFIGURATION AND PROCESS FLOW

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  Reclaim water from AHUs, the creek, wells, and rainwater is collected in the Reclaim Water Tanks. RECLAIM SUPPLY RECLAIM WATER TANK 1RECLAIM WATER TANK 2

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  When the water level in the tanks reaches 4 feet, the reclaim pumps turn on, sending water to the CWP2A and CWP2B cooling tower basins.  When the level drops below 2 feet, the pumps automatically shut off. CWP2ACWP2BRECLAIM WATER RECLAIM PUMP P-1 RECLAIM PUMP P-2 TOWER FILL VALVE TOWER FILL METER

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  When the water level in the tanks reaches 4 feet, water is also pumped to the irrigation system. IRRIGATION SYSTEM IRRIGATION VALVE IRRIGATION METER

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  At what level do the reclaim pumps turn on? – 4 feet – 7 feet – 2 feet – 5 feet

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  When the water level in the tanks reaches 4 feet, the reclaim pumps turn on.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  At what level do the reclaim pumps automatically shut off? – 4 feet – 7 feet – 2 feet – 5 feet

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  When the water level in the tanks reaches 2 feet, the reclaim pumps automatically shut off.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  AHU COOLING COIL CONDENSATE FLOW  Moisture laden air passes through the chilled water coil. CONDENSATE DRAIN ENTERING AIR CHILLED WATER COIL

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  AHU COOLING COIL CONDENSATE FLOW  The moisture condenses on the coil and is captured in the drain pan. CONDENSATE DRAIN ENTERING AIR CHILLED WATER COIL CONDENSATE DRAIN PAN

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  AHU COOLING COIL CONDENSATE FLOW  The booster pump injects condensate into the condenser water line to the cooling tower basin. CONDENSATE DRAIN ENTERING AIR CHILLED WATER COIL CONDENSATE DRAIN PAN BOOSTER PUMP CONDENSER PUMP COOLING TOWER BASIN

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  OPERATIONS MONITORING – Operation of the CHWP-2 Reclaim Water System is monitored through the Control Room on the top floor of CHWP-2. – The Digital Control System (DCS) provides operators with information on system operation and control over system parameters.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  PLANT ROUNDS – During an Operator’s routine shift, Rounds are accomplished to record key information and visually assess Chilled Water System operation. – Each Plant has a Rounds Sheet to be filled out by the Operator. – Each plant has different requirements for plant rounds. – The information is recorded, not only for the current status, but also to record system trends.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  CHWP-2 DAILY ROUNDS – The following is recorded, during operator rounds, specifically for the CHWP-2 Reclaim Water System: Tank #1 Level (inches) Tank #2 Level (inches) Reclaim Pump P-1 (ON/OFF) Speed (HZ/Amps) Reclaim Pump P-2 (ON/OFF) Speed (HZ/Amps) Suction PSI Discharge PSI

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  EXAMPLE CHWP-2 ROUNDS SHEET (front and back)

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  TYPICAL PROBLEMS ASSOCIATED WITH CHWP-2 RECLAIM WATER –Reclaim pumps leaking Most likely cause is packing failure. –Failed Flow Meters Most likely cause is failure or clogging of meter. –Flooding of basement Most likely cause is sump pump has failed or drain is clogged. –Failed Flow Control Valves Most likely cause is clogged valve or failed actuator

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  Where does Operations Monitoring take place? – Control Room in each steam plant – Control Room in West Campus Steam Plant – Control Room in CHWP-2 – Control Room in CHWP-1

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  In the Control Room in CHWP-2

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  Why is it necessary to reclaim water? – Reduce dependence on city water – Reduce costs – Reduce impact on the environment – All of the above

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  All of the above. The purpose of CHWP-2 Reclaim Water is to reduce the dependence on city water, reduce costs, reduce impact on the environment.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  Reclaim water supplies what and irrigation? – Hospital – Reclamation pond – Creek – Cooling tower basin

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Reclaim water supplies the cooling tower basin as makeup.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  How many millions of gallons of water can CHWP-2 use in a day? – 7.4 – 100 – 15 – 60

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  CHWP-2 can use 100 million gallons of water per day.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  How many water reclaim tanks are located in CHWP-2? – 4 – 1 – 2 – 10

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Two water reclaim tanks are located in CHWP-2.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  How many water reclaim pumps are located in CHWP-2? – 4 – 1 – 2 – 10

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Two water reclaim pumps are located in CHWP-2.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  In which year did drought conditions in Durham NC reach record low levels and stimulate Duke’s response? – 2006 – 2007 – 1998 – 2001

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  In 2007 drought conditions in Durham NC reached record low levels in water supplies. Duke helped lead the response.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  How much did the Central Chiller System’s load increase between 2005 to 2010? – 30% – 15% – 60% – 7.4%

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  Between 2005 and 2010 Central Chiller System load increased 60%.

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  QUESTION  Where is the Reclamation Pond being constructed? – Under the cooling towers – In-stream of the storm drainage system – In the basement – Eno River State Park

Facilities Management Utilities & Engineering Services Duke CHWP-2 RECLAIM WATER  ANSWER  The Reclamation Pond, is being constructed in-stream of the storm drainage system.