Calculation Xls | Vacuum Pump Capacity

| S_pump (trial) | C (conductance) | S_eff = =1/(1/S_pump+1/C) | Meets S_req? | |----------------|----------------|-------------------------------|--------------| | 10 L/s | 100 | 9.09 L/s | No (need >9.61) | | 12 L/s | 100 | 10.71 L/s | Yes | | 15 L/s | 100 | 13.04 L/s | Yes |

Define the acceptable time window to reach operational pressure. vacuum pump capacity calculation xls

Elias looked at the rusty portable pump. "Check the nameplate." | S_pump (trial) | C (conductance) | S_eff

"Why the 3-minute difference?" he asked Elias, who was sipping lukewarm coffee. "Check the nameplate

"It's not just about the pump being 'big enough'," Elias concluded. "It's about the balance between the vessel volume, the air leaks, the water temperature, and the seal water temperature. Your spreadsheet tells us that this rusty 600 m3 pump can do the job, provided we don't have a sudden gasket blowout and we throttle the inlet to manage the flash steam."