1. Heat Xfer/RadCon Progress 20Oct2006 By John Tang Benton White

2. Heat Xfer Requirements Max differential pressure: –Across Clinac=6psi –Across chiller=4.1psi Flow rate across piping=4.3GPM 30kW heat dissapation req’d

3. Heat Xfer Constraints Flexible tubing for piping –Fit in confined spaces –Allows for flexible placement of heat xfer components Maintenance considerations –Access to essential components (ie: pump, reservoir tank) easier –Isolation valves

4. Vendor Candidates Vendor Contact Info Dimesion (in) Weight (lbs) Power Requirements Cooling Capacity (kW) Temp range (deg C) Pressure available for piping Liebert 1050 Dearborn Dr W 77x H 69.25 x D 38.57502.2 pump kW25.210 to 2550 psi PO Box 29186 460V 60 Hz 3 phase Columbus, OH 43229 208/230V 800-877-9222 ThermoNE SLAB800-258-0830 W 12.6 x H 23.5 x D 20.9120 115V, 60Hz, 15 Amps1.255 to 35 www.thermo.co m/ or 230V, 50Hz, 8 Amps Ambient 13 to 35C 55 to 95F

5. Pipe Flow Analysis

6. Pipe Flow Analysis (cont.)

7. Use Moody Diagram to find friction factors Find Reynold’s Number, Re D=Diameter V=fluid velocity ρ= fluid density μ= dynamic fluid viscosity

8. Pipe Flow Analysis (cont.) Use of headloss calculations can be used to find differential pressure in piping h L =headloss in piping ν= specific volume of fluid

9. Pipe Flow Analysis (cont.) Determine mass flow rate of fluid

10. RadCon Calcs See excel spreadsheet

11. RadCon Safe operating distance for x-ray dose rate is 9km.