#: locale=en ## Action ### PDF PopupPDFBehaviour_9A12115D_8148_332E_41D4_4C4FD1452BB3.url = files/CHW%20Plant%20Drawing%20Set_en.pdf PopupPDFBehaviour_CB4E1DA6_DD63_5F02_41D6_DEB6F6F2F47B.url = files/Flow%20Switch%20Information_en.pdf PopupPDFBehaviour_68306B32_7072_79F9_41CC_C0D235E41B6B.url = files/Hyspan%20Meter%20Data%20and%20Instructions_en.pdf PopupPDFBehaviour_67FB5066_7076_2799_41C3_C6F3D11C13B9.url = files/Hyspan%20Meter%20Data%20and%20Instructions_en.pdf PopupPDFBehaviour_66FA1690_7072_28B9_41C8_40C917A672D4.url = files/Hyspan%20Meter%20Data%20and%20Instructions_en.pdf PopupPDFBehaviour_667C635D_7072_69AB_41B9_94370F82D63B.url = files/Hyspan%20Meter%20Data%20and%20Instructions_en.pdf PopupPDFBehaviour_87C76276_94B7_8CCB_41B0_895E9BE24D91.url = files/Initial%20Info%20Request_en.pdf PopupPDFBehaviour_86DF2921_95AC_9C48_41C8_5FD6B625EFB2.url = files/Operator%20Interview%20Results_en.pdf PopupPDFBehaviour_A8CEAD08_B866_0388_41C1_136452362578.url = files/Operator%20Interview%20Results_en.pdf PopupPDFBehaviour_6A631D81_7012_189B_41CF_3621E95649CF.url = files/TDV%20Information_en.pdf PopupPDFBehaviour_6C97C766_7012_2999_41DC_1982EAA64A55.url = files/TDV%20Information_en.pdf PopupPDFBehaviour_6CDBA50B_7012_69AE_41D7_AED9785340A3.url = files/TDV%20Information_en.pdf PopupPDFBehaviour_6B2247C6_7012_2899_41D3_6D63362A722B.url = files/TDV%20Information_en.pdf ### URL WebFrame_B1A7FD0F_960B_9BD9_41DF_5002113A530C.url = https://av8rdas.wordpress.com/2017/05/14/condenser-water-systems-air-entrainment-and-pump-cavitation/ WebFrame_89D1677E_91D3_E284_41D5_487D2ACF414C.url = //www.youtube.com/embed/Ac7G7xOG2Ag?si=Fr6ULPf0DDGKA6IA ## E-Learning ### Answer questionOption_B703DC61_9A1A_9A7D_41E1_DE2F34EA2A23.text = 1,060 gpm @ 42 ft.w.c. questionOption_A8548F30_9A1A_97DB_41CD_E15BC23FDF6D.text = 1,100 gpm @ 40 ft.w.c. questionOption_879C119E_9F45_0D5B_41B8_76963ED2B171.text = 360° (allows you to look in all directions but will have some distortion) questionOption_C9A67B46_DD6D_3B02_41E2_DD88452E74CD.text = A chilled water flow meter. questionOption_C87AE5F9_DD6D_CF0E_41DF_7D1D1D7065AB.text = A chilled water flow switch. questionOption_C82A1AC3_DD6D_C503_41CE_707F54815231.text = A condenser water flow meter. questionOption_C9F5CA33_DD6D_4502_41CB_ECE1935B7553.text = A condenser water flow switch questionOption_462BD076_5032_C1E9_41AD_351E338DB75D.text = A flow meter. questionOption_49D26950_503D_4328_41D2_D538A475E136.text = A magnetic water qualtiy control device. questionOption_46595A25_503D_C16B_41D4_3C3B6E3AA271.text = A pressure regulator. questionOption_4606E85B_5032_C1DF_41C8_E9A78EBB3B82.text = A variable iris type control valve. questionOption_86DDCE24_94AC_B44F_41D2_B5283A31F8C0.text = A year's worth of interval data for the utilities. questionOption_C99A5DFC_DD6C_FF05_41C4_A91DD5513674.text = An automatic air vent. questionOption_822ECEC3_9170_4992_41DC_7665CE7A9715.text = Approximately 330 tons. questionOption_87723003_9170_5892_4160_DE1C75556D23.text = Approximately 410 tons. questionOption_B4EBA2E2_9605_AE49_41D4_E4D02C4180EB.text = Automatic air vents. questionOption_87FA47D5_94B5_93C9_41D6_4B48C4764B6F.text = Commissining and energy analysis reports from previous projects. questionOption_89AB99FB_91B4_618E_41DF_3D4FCB2946F3.text = Comply with the lock-out/tag-out procedures in place at the Hijend Hotel and comply with good practice for working around electrical gear. questionOption_8780851A_94AC_B47B_41CB_DA49F7A6F801.text = Construction documents (plans and specifications). questionOption_86918375_94AD_8CC9_41D9_BCC827A79517.text = Control drawings. questionOption_87B5A5CB_94AC_97D8_41C9_0973EE9A8309.text = Guest satisfaction data (records of guest complaints, in particular, compliants related to comfort). questionOption_865F4840_94B4_BCC7_41E1_72947ECDCF92.text = Installation and Operation Manuals (I&OM) for all of the equipment in the facility. questionOption_88E0125E_9538_A1AD_41D5_4FC9C0BA8B2D.text = It is not possible to draw any conclusions from the information that is available. questionOption_827BD684_9170_D996_41AC_9D9C1E955394.text = It is not possible to estimate the load from this information. questionOption_B42936E2_9605_F649_41B7_58D3B099E46B.text = Manual air vents. questionOption_B53C7AAA_960D_FED9_41E1_44ED8BD5810D.text = No questionOption_86564106_94AD_8C48_41E0_A82431B2BF5A.text = One or more year's worth of occupancy data. questionOption_87669763_94AD_94C9_41D3_21325534D0C1.text = One or more years of utilty bills. questionOption_87350E16_9F43_372B_41A6_05525FC157DC.text = Panorama (Most realistic and less distortion) questionOption_869B3CD8_91B3_A78A_41DD_EADC0337E0C9.text = Proceed with caution if you are sensitive to ruminative Diethyliodohexamine. questionOption_877EEA3B_91B4_E28E_41CE_E708E1089393.text = Release the preload on the main spurving bearings. questionOption_8814A06E_953B_626A_41DB_21C6FBAC26B7.text = The condenser water flow rate is above the design target. questionOption_83F30A74_9605_9E4B_41A8_1348EE4C8A77.text = The condenser water flow rate is below the design target but not so low as to cause head pressure problems. questionOption_6B515594_7016_28BA_41D4_7CE2669D8F2E.text = The device is a fixed position balancing valve that has been set 40% open. questionOption_6AF4AD23_7017_F99E_41D9_1944368839C0.text = The device is a fixed position balancing valve that has been set to 40% of the pumps rated capacity. questionOption_6AF769EB_7012_F86E_41D1_BD0B518F09FA.text = The device is indicating the percentage of the pumps rated pressure that is being produced currently. questionOption_88CDC29D_9538_A6AE_4173_06420EBE8C63.text = The flow rate is at approximately the design flow rate. questionOption_6A1E94E1_7012_289B_41D4_8B21899D3BE4.text = The is a pressure regulator that dynamically controls the pressure produced by the pump to the indicated percentage. questionOption_B7603C62_9A05_9A7E_41DD_38DE3EF33209.text = The pump is off its curve at approximately 18 f.t.w.c. questionOption_86163453_94AC_B4C9_41E0_B34BF5E54FA9.text = Trend data for all the systems in the facility. questionOption_86BF865F_91B4_6286_41D2_3DF1570B1B80.text = Use a meter to verify that opening the disconnect switch has isolated the VSD from the power source. questionOption_B5B2ADF6_960D_9A49_4188_FE64AF09FE8D.text = Yes ### Question question_84B7E606_9173_D893_41E0_A5E0FF4B75A5.title = Based on the instrumentation on the evaporator piping at the chiller along with an assessment of the evaporator pump and its nameplate data and/or information from the equipment schedule, what is the load on the chiller currently? \ \ (You may need to visit the engineering office to obtain a copy of the drawing with the equipment schedule and you may need to go over and take a look at the evaporator pumps). question_B799DB34_9A07_9FDA_41C1_DE5D47FF1B3E.title = Based on the instrumentation provided, what is the operating point of the pump currently? question_6CE557A3_7016_289F_41C5_603E9F869B75.title = Congratulations! You have scored two points for being curious. Now see if you can add to that by answering the following question: \ \ What is the function of the device that is concealed under the insulation.? (The cylinder and scale that are highlighted are a part of it.) question_461B0BE9_503E_C6F8_41D0_46B3BCB25EEB.title = Congratulations! You scored 2 points for being observant. Now see if you can pick up a few more points by answering this Question: \ \ What is this device that you are looking at? question_B27C859C_960D_EAF9_41DA_8CD309C0F403.title = Could a modification here resolve an issue that the operators mentioned in the operator interview? (You may need to visit the engineering office to get a copy of the notes from the operator interview, which include some of the issues the operators are hoping you can help them resolve). question_875F8004_91B4_BE7A_41DE_B7714374EA3B.title = If you needed to open up the VFD enclosure to inspect or service the components inside, what precautions should you take? question_87BD04EA_94D4_F5DB_41B7_4693C466C4AC.title = Ultimately, you will likley need all of the items on thi list below as you work on the EBCx project. But which five items would be the most important and practical to request in advance of your initial site visit (especially if your project was energy efficiency driven) to help you focus your scoping effort and maximize the benefit of your field time? question_B41306CB_961B_965F_41B0_17C7CF730EDE.title = What are we looking at here? question_88B842CF_9538_E6AB_41A1_35A7E7F86721.title = What does the information provided by the instrumentation on Chiller 2's condenser water connections tell you about the condenser water flow when you compare it with the current operating condition and information on the equipment schedule? (You may need to visit the Engineering Office to get a copy of the equipment schedule.) question_C91F70AE_DD65_4502_41D2_7778F6297338.title = What is this device? question_8871E06A_9F4F_0BFB_41DE_CEC2E922AEA7.title = What type of view would you like from this location? ### Question Screen quizQuestion_46A39EEF_50ED_5EF8_4197_3746E25901FA.ok = OK ### Report Screen quizScore_46A5BEEF_50ED_5EF8_41D1_7C556F53EED1.title = - SCORE - quizScore_46A5BEEF_50ED_5EF8_41D1_7C556F53EED1.completion = Completed quizScore_46A5BEEF_50ED_5EF8_41D1_7C556F53EED1.questionsCorrect = Correct quizScore_46A5BEEF_50ED_5EF8_41D1_7C556F53EED1.downloadCSV = Download .csv quizScore_46A5BEEF_50ED_5EF8_41D1_7C556F53EED1.questionsIncorrect = Incorrect quizScore_46A5BEEF_50ED_5EF8_41D1_7C556F53EED1.items = Items Found quizScore_46A5BEEF_50ED_5EF8_41D1_7C556F53EED1.questions = Questions quizScore_46A5BEEF_50ED_5EF8_41D1_7C556F53EED1.repeat = Repeat quizScore_46A5BEEF_50ED_5EF8_41D1_7C556F53EED1.submitToLMS = Submit quizScore_46A5BEEF_50ED_5EF8_41D1_7C556F53EED1.elapsedTime = Time ### Score Name score1.label = Score 1 score2.label = Score 2- view selection ### Timeout Screen quizTimeout_46A39EEF_50ED_5EF8_41AF_879A7AF2D5CF.title = - TIMEOUT - quizTimeout_46A39EEF_50ED_5EF8_41AF_879A7AF2D5CF.repeat = Repeat quizTimeout_46A39EEF_50ED_5EF8_41AF_879A7AF2D5CF.score = View Score ## Hotspot ### Tooltip HotspotPanoramaOverlayArea_840A601A_9474_8C7B_41D6_A2C9437D11B9.toolTip = 360° View From This Location HotspotMapOverlayArea_9D44D960_8FC4_28AA_41D9_5D1D8DD5C856.toolTip = 360° perspective standing at the top of the stairs to the tunnel. HotspotMapOverlayArea_C0B254C4_D2BE_5BC5_41DC_68D374668351.toolTip = Allows you to look around at the chilled water pumps. HotspotPanoramaOverlayArea_B75CBAC8_961A_FE59_41C0_4FBD3FCCA728.toolTip = Answer this after checking out the other hot spot HotspotPanoramaOverlayArea_B43C6937_9605_9A37_41D8_6DA367F6BB09.toolTip = Check this out first HotspotPanoramaOverlayArea_980B1D3D_8A8C_F678_41C8_1E499A7D2156.toolTip = Go into the Engineering Office HotspotMapOverlayArea_5CADE529_58F0_57B8_41B2_3815A031ACFA.toolTip = Looking around standing between the chillers, standard vs. 360° perspective. HotspotMapOverlayArea_54A5AF65_5870_73AB_41BD_9A01BCB7A43F.toolTip = Looking down the tunnel at the half way point; standard perspective. HotspotPanoramaOverlayArea_FDEC3B91_E3A5_3B1F_41E1_9965412982CC.toolTip = Move into the tunnel HotspotMapOverlayArea_5EB20447_5890_D5E8_41A1_AEF63599A364.toolTip = Starting Point Standing Inside the Door HotspotPanoramaOverlayArea_DC36CDAC_D2AA_6A45_41C2_FD0F3A9B208E.toolTip = Table with Drawings HotspotMapOverlayArea_5D736F31_7013_FF6B_41BB_E412BE66A027.toolTip = Takes you to the area under the cooling towers HotspotMapOverlayArea_5AB3D778_7017_CFD8_41B5_86E142D2631B.toolTip = View as you enter the condenser water pump room HotspotMapOverlayArea_428B0EDA_5015_7ED9_419E_51D6535EE539.toolTip = View from near ceiling level HotspotMapOverlayArea_50B955CD_5890_36F8_41D0_F672B9D26508.toolTip = View from near celing level HotspotMapOverlayArea_5D6FE1AF_70EF_4377_41B0_8D160D2EA79C.toolTip = View from near floor level HotspotMapOverlayArea_52F14DBD_5890_5698_41D3_1ED699A19F26.toolTip = View from near floor level HotspotMapOverlayArea_5CC71147_58F0_2FE8_41CC_2F06ADB764D1.toolTip = View from the top of a ladder near the chillers; standard vs. 360° perspective. 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Connections panorama_4494DAF1_7073_46EB_41D1_232B9BEE86E6.subtitle = Meet some of the engineering team and see what resources they might have album_FD9DAC61_E363_5D3E_41E6_0504BC03511E.subtitle = Test panorama_6B26C3FB_7016_286F_41D5_0D6E9ED080BC.subtitle = The close up is of the cylinder sticking out at an angle panorama_49E69663_4890_55A8_41C9_B429E02151C1.subtitle = This is the view you would see as you entered the plant and is the starting point for the tour panorama_5BA602E8_5870_32B8_41BE_BEC4989EF154.subtitle = This is what you would see about half way down the utiltiy tunnel looking towards the condenser water pump room panorama_5BA6F5AB_5870_36BF_41D2_3714D384709B.subtitle = This is what you would see as you entered the condenser water pump room from the utility tunnel panorama_55665048_5870_2DF8_41D1_44212AED1636.subtitle = This is what you would see at the bottom of hte stairs to the tunnel panorama_52DAF5F5_5890_56A8_4179_955E26D32D99.subtitle = This is what you would see at the top of the stairs to the utiltiy tunnel that takes you to the condenser water pumps and the district steam service entrance panorama_5BA667EB_5870_32B8_419E_C36760104F18.subtitle = This is what you would see if you looked back towards the central plant from the condenser water pump room panorama_9F27AFA0_8ABB_7208_41AF_F87127685244.subtitle = This is what you would see if you walked into the room and stood at the beginning of the aisle between the chillers. It is full 360° panorama, so you can look in all directions allthough things may be a bit distored at some angles. panorama_5593AC78_58B0_3599_41C4_EB80D8BD83A7.subtitle = This is what you would see if you were standing at the stairs in teh condenser water pump room with your eye level near the floor panorama_54167C2B_58B0_35B8_41B3_1B07F703FF33.subtitle = This is what you would see if you were standing at the stairs in teh condenser water pump room with your eye level near the top of the room panorama_58E681CA_4790_6EF8_41B4_789065353257.subtitle = This view complements the view from inside the front door and lets you see how the chilled water piping is routed to the pumps panorama_5682F0EE_48B0_2EB8_4193_F79C74B30654.subtitle = This view focuses on the chilled water distribution pumps panorama_48A3C092_4993_ED68_41A2_C2914104A206.subtitle = This view lets you look around the entire mechanical room and may help you decide where to go next. panorama_571FBEF6_48B0_32A8_41D1_B1ECE98F2546.subtitle = This view places you in front of the chillers to look around the room panorama_57581CF2_4870_D6A8_41C5_F8E33B185BED.subtitle = This view puts you between the chilled water pumps so you can explore them ### Title album_5C3C44C2_5890_76E8_41C0_661F5C223A49_0.label = 01 panorama_9F27AFA0_8ABB_7208_41AF_F87127685244.label = At Chiller Aisle panorama_C5C101B3_DCE4_C702_41E2_EC9FBD0AA6EF.label = At Tunnel Stairs 360 album_B0AFD231_97FB_E9C9_41DE_BA7254942A2D_0.label = Auto Air Vent- Caption panorama_48A3C092_4993_ED68_41A2_C2914104A206.label = Beginning of Chiller Aisle map_58998C93_5871_D568_41C2_79073F23274B.label = Below Cooling Towers panorama_57581CF2_4870_D6A8_41C5_F8E33B185BED.label = Between Pumps album_C547B7F2_DCBC_CB02_41D2_7CC448B65DEE.label = CHSP3 adn 4 VSDs panorama_C5967456_DCA7_4D05_41CC_7A69A5DF434B.label = CHSP3 adn 4 VSDs album_C547B7F2_DCBC_CB02_41D2_7CC448B65DEE_0.label = CHSP3 adn 4 VSDs album_9ACBA456_8148_F13B_41A4_1AD2A1B98A2B_0.label = CHW Plant Drawing Set_Page_1 photo_6C876D17_7A96_6953_41CC_B650AD077020.label = CHW Plant Drawing Set_Page_1 photo_6C876D17_7A96_6953_41CC_B650AD077020.label = CHW Plant Drawing Set_Page_1 album_9ACBA456_8148_F13B_41A4_1AD2A1B98A2B_1.label = CHW Plant Drawing Set_Page_2 photo_6EB36637_7A96_7B52_41DD_A4E9FBA95F58.label = CHW Plant Drawing Set_Page_2 photo_6EB36637_7A96_7B52_41DD_A4E9FBA95F58.label = CHW Plant Drawing Set_Page_2 photo_6E812F4A_7A96_693D_41DD_42EE975953C2.label = CHW Plant Drawing Set_Page_3 photo_6E812F4A_7A96_693D_41DD_42EE975953C2.label = CHW Plant Drawing Set_Page_3 album_9ACBA456_8148_F13B_41A4_1AD2A1B98A2B_2.label = CHW Plant Drawing Set_Page_3 photo_6E8127A1_7A96_196F_41D5_55F3895B5DEB.label = CHW Plant Drawing Set_Page_4 album_9ACBA456_8148_F13B_41A4_1AD2A1B98A2B_3.label = CHW Plant Drawing Set_Page_4 photo_6E8127A1_7A96_196F_41D5_55F3895B5DEB.label = CHW Plant Drawing Set_Page_4 photo_8A849B40_9605_FE4A_41C2_44848B637222.label = CHW Temp Transmitters - Caption photo_8A849B40_9605_FE4A_41C2_44848B637222.label = CHW Temp Transmitters - Caption album_C57B920B_DCA4_C502_41DC_9E8E5A81A03E_0.label = CHWP-2 Discharge As Found album_C57B920B_DCA4_C502_41DC_9E8E5A81A03E.label = CHWP-2 Discharge As Found album_C563450D_DCA5_4F06_41E6_FF691EE763E3_0.label = CHWP-2 Motor Nameplate album_C563450D_DCA5_4F06_41E6_FF691EE763E3.label = CHWP-2 Motor Nameplate album_C4D7AE53_DCA5_DD02_41E6_4FD2AA6E0F10.label = CHWP-2 Nameplate album_C4D7AE53_DCA5_DD02_41E6_4FD2AA6E0F10_0.label = CHWP-2 Nameplate panorama_C67C576E_DCA7_4B05_41C0_5A3D0FAAC5CF.label = CHWP-2 Starters album_C56013B4_DCA4_CB05_41D8_03224E8A5FC4.label = CHWP-2 Suction As Found album_C56013B4_DCA4_CB05_41D8_03224E8A5FC4_0.label = CHWP-2 Suction As Found panorama_C44354F5_DCA7_4D06_41D9_C4B85D8E0D58.label = CHWP-2-2 album_C54483EA_DCA3_4B02_41E3_C9D534531473.label = CHWP-3 VSD album_C54483EA_DCA3_4B02_41E3_C9D534531473_0.label = CHWP-3 VSD album_C5726874_DCA3_C505_41C9_604F227E6EEC.label = CHWP-4 VSD album_C5726874_DCA3_C505_41C9_604F227E6EEC_0.label = CHWP-4 VSD panorama_B48EB80D_9606_B9DB_41C3_D6AC445FB4D4.label = CW Air Vents panorama_A2309338_9E0D_6FD1_41D5_97B500E57FF0.label = CW Air Vents- Zoom panorama_B4B48E2C_961A_99D9_41E1_DC42785228A8.label = CW Air Vents- Zoom panorama_57E8B507_58B0_F768_41C4_4465538BB232.label = CW Bypass photo_9BE0937F_95FE_AE33_41C6_61CDF53B8A05.label = CW End Caption photo_9BE0937F_95FE_AE33_41C6_61CDF53B8A05.label = CW End Caption panorama_5F91AA7B_502D_C1DF_41C5_C9A0C89B2415.label = CW Flow Meter panorama_56D21981_58B0_5F68_41D0_7E78FC50B117.label = CW Pump ROom Corner - Minus 6 Feet panorama_54167C2B_58B0_35B8_41B3_1B07F703FF33.label = CW Pump Rm View Standing at the Stairs, High View panorama_5593AC78_58B0_3599_41C4_EB80D8BD83A7.label = CW Pump Rm View Standing at the Stairs, Low View panorama_5595BD5A_5890_3798_41AE_8B5032F7B48B.label = CW Pump Room Corner Minus 2 Foot 9 map_5EF3AD40_5890_37E8_41B0_D84D6A655AA6.label = Chilled Water Plant album_C9838892_DD65_4502_41DC_4FFE2617FFCB_0.label = Chiller 2 CW Flow Switch album_FC6237FC_E363_CB05_41E4_23F951E0BC04.label = Chiller 2 Chilled Water Connections album_FD9DAC61_E363_5D3E_41E6_0504BC03511E.label = Chiller 2 Condenser Water Connections photo_88D2FB29_960D_7FDB_41C8_E4ABEB2F0AE2.label = Chiller 2 Control Panel - Caption photo_88D2FB29_960D_7FDB_41C8_E4ABEB2F0AE2.label = Chiller 2 Control Panel - Caption photo_8A8B4568_960A_EA5A_41DB_B85D3A60BC07.label = Chiller 2 Entering Water Pressure Gauge - Caption photo_8A8B4568_960A_EA5A_41DB_B85D3A60BC07.label = Chiller 2 Entering Water Pressure Gauge - Caption panorama_CEF1BBA8_DD63_DB0D_41E3_AFB5C0524AAE.label = Chiller 2 Front photo_8CA0C9A0_960A_FACA_41C8_0FC0E4D7B2AC.label = Chiller 2 LWT Logger - 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Venturi Flow Meter
The operating team does not realize that this exists because their drawings indicate that all flow meter points were eliminated from the project by value engineering. But the value engineering effort was not well coordinated.
It did in fact eliminate the control points and related work from the control system contractors work. However, the physical meter was provided by the mechanical contractor because it had to be welded in place and it was not eliminated in the documents defining the mechanical contractor's scope of work.
Thus it was welded into the system but no control system hardware and software were provided to pick up, display and use the signal from it.
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By its nature, a condenser water system is constantly exposing the recirculated water to air. One of the main goals associated with the design of a cooling tower is to maximize the contact of the condenser water with the ambient air in order to transfer heat from the condenser water to the ambient air via evaporation and sensible heat transfer.
The solubility of air in water decreases as the water temperature increases. So, by nature, condenser water systems will tend to absorb air into the water at the cooling tower and then drive the air out of solution when it is heated by the rejected heat from the load, which in this case are the chillers. Thus, even if you vent air from the high points when you fill the system, air will continue to accumulate there because the system is constantly absorbing it at the cooling towers and then driving it out of solution in the chiller condensers.
During the operator interview, the operating team mentioned that "the condenser water system tends to become air-bound, even though they go through and manually vent the air. They do not understand this and hope that it can be explained and corrected."
Replacing these manual air vents with automatic air vents may help alleviate that problem. That may not be as easy as it seems because the piping is running very close to the ceiling and their may not be room to pipe in an automatic air vent. But, extending the piping from the manual air vents to near floor level woudl allow the operators to easily vent air manually on a routine basis and may be a good compromise solution.
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This blog post discusses this in more detail.
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Congratulations! You have just scored a point for taking the time to get to know the operating team you will be working with.
Harley (David's son) is working part time for Hijend as an Engineering Technician while completing his engineering degree at a local university. It was his excitement about Hijend's approach to operations that got his Dad interested in working for Hijend when the DOE position opened up.
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Congratulations! You just scored a point for spending some time getting to know the operating team you will be working with.
Noreen has been at the hotel since it was opened, starting out as an engineering technician. She was recently nominated to attend the Hijend Hotel's Advanced Engineering Program (AEP), where she has been introduced to Existing Building Commissioning (EBCx) principles and encouraged to make them standard operating proceedure at her hotel.
As a result, she has retained Joe DeNuguy and his team to support her and her engineering technician Harley in their initial EBCx effort.
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Congratulations! You just scored a point for taking the time to get to know the operating team you will be working with.
David is new to the Hijend Hotel system, coming into it from a position as director of facilities for Center of the State University (COSTU) in Golden Girl, Missouri.
David's son, Harley, is attending a nearby university in pursuit of an engineering degree, and works for Hijend part time as an engineering technician. It was Harley's enthsiasm for Hijend's approach to operations and their dedication to sustainable, efficient operations that caused David to apply for the DOE position when it opened up, even though it meant a move from the Midwest to the West Coast.
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Congratulations! You just scored a point for taking the time to get to know the operatint team you will be working with.
Kathy has been at the Hijend since it opened and manages the hotel's facility engineering office.
She is a wealth of information. If you are looking for a drawing or information about a piece of equipment, she is very adept at retriving everything there is on it from her filing system and providing you with copies.
She is also extremely good at multitasking; she can be enchanting the person who just showed up in the office in receptionist mode while patching a call through from a vendor to David's voice mail, all accomplished while sorting the mail and filing submittals from the current meeting room rennovation.
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Congratulations! You just scored a point for visiting the Engineering Office.
This is an important stop, and ideally, should be the first stop you make, especially on your first site visit. For one thing, you should let the engineering team know you are there and what you will be doing before you start wandering around in their plant.
Plus, its an opportunity to get to know the folks who will ulitmately implement the recommendations you make. Showing up with doughnuts occasionally never hurts.
In addition, most engineering offices include a library of information that will be crucial for your success, things like drawings, specifications, utiltiy records, equipment submittals and manuals, etc.
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Contratulations, you scored a point for identifying an important resource. As you work through the project, you will want to check back here to see if there is information available to support the development of your findings.
For example, if you discover a pump optimization opportunity, you may want to check back here for the submittal information on the pump and the pump curve.
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The image from the Hijend Hotel model shows what amounts to a manual air vent; basically a tap into the high point in the system with a manual ball valve provided to allow air to vented.
In contrast, automatic air vents typically have some sort of float mechanism that allows them to vent air as needed. Providing a ball valve between them and the system is still quite desireable since it will allow them to be serviced with out having to drain the system.
These photos illustrate a project with an inverted trap that only had a manual air vent. After air kept accumulating, automatic air vents were added. Details can be found at this link.
https://av8rdas.wordpress.com/2009/02/04/commissioning-a-condenser-water-system-part-1-evidence-of-an-issue/
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To answer this, you need to estimate the approximate amount of cooling that is being done by the chiller and recognize that the power being drawn by the compressor will also show up as rejected heat into the condenser water system.
Recognizing that, you can solve the water side load equation for flow using your estimate of rejected heat and the observed temperature rise, which will cause you to conclude that there is more than the design flow rate.
The higher than design flow rate is also evidient from the higher than design pressure drop across the condenser. You could use the observed pressure drop and the design flow rate and pressure drop from the equipment schedule along with the square law to estimate the current flow rate.
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Using the two existing gauges you can read a differential pressure of 18 psig. Converted to feet, this is approximately 42 ft.w.c. Using the 42 gpm, you can enter the pump curve and read a flow rate of 1,060 gpm.
You can obtain the pump curve by using the pump nameplate data to search online. Or, you may have found it by discovering the Wall-E information icon, which lets you download a digitized version of it.
The gauges are not labled with engineering units. However, it is reasonable to assume a gauge is reading in psi, not feet water column because reading in psi makes it independent of the fluid in the piping system.
A better test result would be obtained by using a single gauge because the gauge error would cancel out. If you did this by taking a reading with one gauge and then moving it to the other gauge valve and taking a second reading, you would have concluded the pump was running at 1,179 gpm at 37 ft.w.c.
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When working on electrical equipment, it is absolutely critical to comply with the protocols in place at the facility where you are working and also with good practice.
Good practice would dictate that you open the disconnect switch and lock it open with your designated lock along with a tag indicating that you had placed the lock on the disconnect. In some facilities, you may not be able to do this unless you have proper credentials, for instance, arc-flash training certifications or being a licensed electrician.
If I had a nickel for each time a Turboencabulator failed because someone failed to release the preload on the main spurving bearings, I would be rich. Taking this step is crucial to success.
Finally, the reason that being cautions if you are sensitive to ruminative Diethyliodohexamine. was not a correct answer is that the Turboencabulator module contains ruminative Tetraethyliodohexamine. Ruminative Diethyliodohexamine is totally safe because of the Di part instead of the Tetra part.
For a detailed explanation of the Turboencabulator, visit the link below.
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You just scored a point for noticing a resource that will be useful to you in your EBCx effort. Perhaps you can get a copy of the drawings from the Engineering Office.
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We intentionally made the instructions cover the whole screen at start-up to encourage you to take a minute to read through them This will help you gain the maximum benefit from the exercise. Notice there are several tabs. This first one give you general instructions on how to navigate the model and what the function of the buttons are in the lower left corner. The second provides guidance about the icons you will run into as you navigate through the model, which generally are hot spots that open other views or interactive elements.The third provides some background information about what is going on in the facility on the day of your virtual exercise. The events and climate conditions likely impact the systems you will be observing.


This exercise is intended to allow you to generally explore the Hijend Hotel central chilled water plant and then focus on scoping the condenser water system and cooling towers. The model uses three different types of images to create the tour.


• Plan and elevation views
• Panoramas
• 360° spherical views


The plans, elevations and panorama views will be the most realistic. But, the plans and elevations will have very limited panning and zooming and are used to focus on a particular learning experience.


In contrast, the panoramas will allow you to pan left and right and zoom a bit but will not allow you to pan up and down. It is as if you were standing someplace and turned your head left or right to look around. They are used to allow you to explore the model with the most realistic perspective and will contain hot spots that you can select so that you can investigate something in greater detail and perhaps score a point or two.


The 360° spherical views generally provide full flexibility to look in all directions and zoom quite a bit. But because of the technique used to create them, they will have some distortion associated with them. However, they are useful if you are trying to trace out a pipe, duct, or conduit because they will allow you to follow it, just like you would in the field. Thus they provide a different way to explore the model and will also contain hot spots that will allow you to investigate items of interest an perhaps score points.


There are a number of ways to navigate through the model. One is to use the floor plan viewer in the upper left corner. A drop down menu allows you to pick different areas in the model. The floor plans contain a number of red dots and squares. When you click on a red dot or square, you will be placed at that location, as if you were standing there. Red squares will allow you to select either a 360° spherical view or a panorama view. The red dots are locations with only a panorama type view. The yellow "radars" around the dot or square when you have clicked on it show your field of view.


There is a button in the lower left corner that lets you turn the floor plans on and off and generally you will probably want to turn them off once you have selected a location to maximize your viewing area. If, after following a series of hot spots, you find yourself "stuck" with no way back to where you came from, you can always use the floor plan viewer to return to one of the locations it contains and move on from there.


As you pan around in the different views and mouse over them, you will discover "hot spots" that will show up as a highlighted area. If you click on one of them, you will find things like information, questions you can answer to score points, or be taken to a different view based on the hot spot location. For instance, a hot spot over a door will probably take you through the door. A hot spot over an item like a piece of equipment will probably take you to a question or information about the item.


The buttons in the lower left corner of the screen will allow you to toggle a number of things on and off so you can refer to them as needed but otherwise free up the view.


• The one at the far left that looks like a floor plan toggles the floor plan on and off.
• The "View Information" button toggles the general information on the lower right corner on and off.
• The "Instructions" button toggles this instruction card on and off
• The speaker button toggles the sound on and off.
• The score button toggles your score on and off. The score window shows your total score along with the maximum number of points you can score.
• The camera button will take a screen shot and allow you to save it. It is analogous to being out in the field and taking a picture with your camera when you are scoping out a project or doing field work.



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### Tab Panel TabPanelPage_7F8F0284_6B90_ABB6_41B0_FB239CFED44F.label = Current Conditions TabPanelPage_7DEED519_6BF7_AEDE_41B1_76D226E7F6FC.label = General Instructions TabPanelPage_7F8F3284_6B90_ABB7_41D5_C4C686AA24E4.label = Icon Definitions ### Tooltip Image_62BA89E2_7012_189E_41D6_3624BC7A95F3.toolTip = Click to Take a Screen Shot Image_43C39437_5015_4157_41D4_61C0ED482907.toolTip = Click to Toggle Floor Plans Image_7C2BD0B4_5012_C169_41D3_D60E6EFA23B1.toolTip = Click to Toggle Instructions ## Tour ### Description tour.description = CW System Focused Scoping Exercise ### Title tour.name = Chiller Plant Scoping v12