: Smaller units like a 2.5 CFM pump are often sufficient for automotive air conditioning.
| 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 |
To help refine your specific sheet, tell me: What is this for, what is your target vacuum level , and do you want to add vapor load tracking to the sheet? Share public link vacuum pump capacity calculation xls
Compare the resulting flow rate (in your chosen units, e.g., cfm, L/s) against the performance curves of real-world pumps. Choose a model that meets or slightly exceeds the requirement.
Note: Multiplying the time (B4) by 60 converts minutes to seconds, giving you a baseline volumetric flow rate in Liters per second (L/s). 3. Unit Conversion Cheat Sheet for XLS Automation : Smaller units like a 2
Used to determine how long it takes to reach a target pressure.
For industrial applications, the capacity often includes compensations for air leakage (typically per meter of gasket joint) and dissolved gases. EVP vacuum pump Excel Calculation Guide (XLS Template Setup) Share public link Compare the resulting flow rate
: A direct Excel download for calculating evacuation times.
Link the final required speed to standard pump sizes (e.g., Fieldpiece 5-CFM or 10-CFM models for HVAC use).
What is your ? (e.g., rough, medium, or high vacuum)