1. NOvA Water Cooling System Erik Voirin, Mike Zuckerbrot Erik Voirin; Mike Zuckerbrot1NOvA Water Cooling System

2. Equipment Placement Need 4 of the previous 15 areas where the chillers were planned to be placed. 2 for 1 chiller each 1 for two pumps / PLC/ Panel 1 for water reservoir Which 4 areas is unimportant however: – Would like to use 2 close to each end of the building Erik Voirin; Mike ZuckerbrotNOvA Water Cooling System2

3. Equipment Placement Erik Voirin; Mike ZuckerbrotNOvA Water Cooling System3

4. Catwalk Layout Erik Voirin; Mike ZuckerbrotNOvA Water Cooling System4

5. Recent Cooling System Changes 16 TEC’s in Series instead of 32: Pros: – Allows the system to run at lower pressures Less chance of leaks, lower leak rate in case of leak. – Lowers the range of highest to lowest TEC water temperature May be important for aging TECs? Previous Range was ~3.8C, new range will be ~2.1C Erik Voirin; Mike ZuckerbrotNOvA Water Cooling System5

6. Recent Cooling System Changes 16 TEC’s in Series instead of 32: Cons: – Requires more hoses (higher heat leak) – Requires larger pump (higher electrical use) – Higher initial and operational cost (slightly) Overall Effect: Slightly less cost effective design but with a larger margin of safety for leaks and TEC/TECC issues. Erik Voirin; Mike ZuckerbrotNOvA Water Cooling System6

7. Schedule Erik Voirin; Mike ZuckerbrotNOvA Water Cooling System7 Conceptual design, specification3/30/2011 P&ID, Valve list, instrument list, equipment bids4/30/2011 Pipng and equipment layout5/30/2011 Prototype and test necessary portions6/15/2011 Order all components and equipment6/30/2011 Begin adding Solid model of Cooling System to Detector model7/1/2011 Receive all components and equipment8/30/2011 PLC setup and programming10/30/2011 Complete assembly of one di-block & chillers10/30/2011 Procedures, commissioning plan10/30/2011 Complete commissioning11/30/2011 Add piping/equipment for additional Di-BlocksAs needed