1 / 23

Big 10 and friends utility conference May 3, 2010 Presenter: Glenn Lelko

Campus Chilled Water System. Extensive underground piping system, presently connecting 52 buildings throughout campus, serving 3.6 million square feetOperates year

keran
Download Presentation

Big 10 and friends utility conference May 3, 2010 Presenter: Glenn Lelko

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Big 10 and friends utility conference May 3, 2010 Presenter: Glenn Lelko

    2. Campus Chilled Water System Extensive underground piping system, presently connecting 52 buildings throughout campus, serving 3.6 million square feet Operates year ‘round; 24/7/365 More efficient, more reliable, less maintenance than chillers located in each building Electrical power outages may impact system; no emergency power for campus chilled water system, however multiple plants increases reliability of system Summer chilled water temperature 43şF (mechanical cooling) Winter chilled water temperature 45şF (free cooling)

    3. Campus Chilled Water System Master Plan

    4. Campus Chilled Water Plants NORTH CAMPUS CHILLER PLANT 5600 tons current cooling capacity 11,600 tons ultimate anticipated cooling capacity WEST CAMPUS CHILLER PLANT 2000 tons current cooling capacity 12,00 tons ultimate anticipated cooling capacity CHEMISTRY CHILLER PLANT 4000 tons cooling capacity (expansion not possible) EAST CAMPUS CHILLER PLANT (future) 15,000 tons cooling capacity anticipated Total Campus Chilled Water System Current Cooling Capacity: 11,600 tons Ultimate Anticipated Cooling Capacity Required: ~40,000 tons

    5. North Campus Chiller Plant (NCCP) Original construction 2004; 3000 tons cooling capacity Expansion 2008; 2600 tons added Expansion 2010; 3000 additional tons being added Final expansion ????; 3000 additional tons planned Anticipated total plant cooling capacity 11,600 tons Variable primary chilled water system Winter free cooling capacity approximately 1500 tons

    6. North Campus Chiller Plant (NCCP) 4 Carrier, electric, centrifugal chillers: 2 @ 1500 tons rated capacity (19XR) 2 @ 1300 tons rated capacity (19EX) 2-pass evaporators, 1-pass condensers R-134a refrigerant 4160 volt motors Approximately 0.60 kw/ton rated full load efficiency

    7. North Campus Chiller Plant (NCCP) 4 electric, chilled water pumps: 2 Aurora, horizontal split case 2 Gould, horizontal split case 200 HP motors Variable Frequency Drives 480 volt motors Rated at 3000 gpm & 153’ head; capable of >4000 gpm

    8. North Campus Chiller Plant (NCCP) 4 electric, condenser water pumps: 2 Aurora, horizontal split case 2 Gould, horizontal split case 125 HP motors Variable Frequency Drives 480 volt motors Rated at 4500 gpm & 85’ head

    9. North Campus Chiller Plant (NCCP) 4 Marley induced draft, counterflow cooling towers: 100 HP motors Variable Frequency Drives 480 volt motors Rated at 4500 gpm, 85/96°F, 78 °F WB

    10. West Campus Chiller Plant (WCCP) Original construction 1999; 2000 tons cooling capacity Currently Primary/Secondary chilled water system Winter free cooling capacity approximately 150 tons; operation is problematic, not used Modifications 2011: Covert from Primary/Secondary to Variable Primary Modify free cooling system and increase capacity Connect 1300 ton used chiller Correct cooling tower basin issue Anticipated total plant cooling capacity 12,000 tons

    11. West Campus Chiller Plant (WCCP) 2 Trane, electric, centrifugal chillers: 2 @ 1000 tons rated capacity (CVHF) 2-pass evaporators, 2-pass condensers R-123 refrigerant 4160 volt motors Approximately 0.60 kw/ton rated full load efficiency

    12. West Campus Chiller Plant (WCCP) 5 electric, chilled water pumps 2 Primary pumps; Paco, horizontal split case type: constant speed rated at 1334 gpm & 55’ head 30 HP, 480 volt motors 3 Secondary pumps; Paco, horizontal split case type : variable speed rated at 1520 gpm & 95’ head 60 HP, 480 volt motors

    13. West Campus Chiller Plant (WCCP) 2 electric, condenser water pumps: 2 Floway, vertical turbine type Variable speed drive Rated at 3000 gpm, 100’ head 100 HP, 480 volt motors

    14. West Campus Chiller Plant (WCCP) 2 Ceramic Cooling Tower, Inc. induced draft, counterflow cooling towers: 40 HP motors 2-speed motors currently; plan to add variable frequency drives in future 480 volt motors Rated at 3000 gpm, 85/95°F, 74 °F WB

    15. Chemistry Chiller Plant (CHCP) Construction 2002; 4000 tons cooling capacity Expansion for additional capacity not possible Variable primary chilled water system Winter free cooling for Chemistry Building process cooling system only

    16. Chemistry Chiller Plant (CHCP) 3 Carrier, electric, centrifugal chillers: All 3 chillers are identical 1350 tons rated capacity (19XR) 2-pass evaporators, 2-pass condensers R-134a refrigerant 4160 volt motors Approximately 0.60 kw/ton rated full load efficiency

    17. Chemistry Chiller Plant (CHCP) 4 electric, chilled water pumps: Bell & Gossett, horizontal split case 100 HP motors Variable Frequency Drives 480 volt motors Rated at 2022 gpm & 110’ head; capable of ~2700 gpm One pump is standby

    18. Chemistry Chiller Plant (CHCP) 4 electric, condenser water pumps: Bell & Gossett, horizontal split case 100 HP motors Constant speed 480 volt motors Rated at 3823 gpm & 80’ head One pump is standby

    19. Chemistry Chiller Plant (CHCP) 4 Marley induced draft, crossflow cooling towers: 75 HP motors Variable Frequency Drives 480 volt motors Rated at 2867 gpm, 83/93°F, 75 °F WB All 4 towers required when running 3 chillers; no standby

    20. Chilled Water System Type Primary/Secondary vs. Variable Primary Major differences: Constant flow through chiller vs. variable flow Hydraulically de-coupled chiller loop vs. series connection Number of pumps Pumping power required Pump sizing; flow and head requirements Control of the pumps PSU plans to convert entire system to Variable Primary

    21. Plant Differences Location of starters and Motor Control Centers Cooling Towers sump location at WCCP sump heating system at NCCP fan motor control Pumps: pre-piped skids vs. field fabricated Space for maintenance and access for equipment delivery and removal

    22. Free Cooling Water-side economizer using plate & frame heat exchanger Significant energy saving realized from not running chiller Maintain approximately 45-46şF chilled water Requires an outside air temperature of approximately 40 şF wet bulb or lower Ice build-up is an operational issue that requires daily attention by maintenance personnel

    23. Control System Automated Logic Corporation – Building Automation System (BAS), not an “industrial” control system The system is a native BACnet control system Every piece of equipment is connected, controlled, and monitored by the BAS The BAS also monitors and uses water temperatures and pressures for control of plant equipment All pump and cooling tower fan motors are operated through Variable Frequency Drives Staging of chillers is currently a manual operation; might be automated in the future Differential Pressure at each building is monitored; chilled water pumps at the plants operate to maintain critical DP at buildings

    24. Questions ??? Comments Observations

More Related