Ejector Design Calculation Xls Review

Here’s a recommended layout for your ejector design calculator XLS:

| A Column | B Column | C Column | |----------|----------|----------| | Inputs | Value | Unit | | Motive fluid type | Steam / Air / Gas | - | | Motive pressure | 8 | bar g | | Motive flow | 500 | kg/h | | Suction pressure | 0.5 | bar abs | | Discharge pressure | 1.2 | bar abs | | Calculations | | | | Critical pressure ratio | 0.528 (for ideal gas) | - | | Nozzle throat diameter | 4.2 | mm | | Entrainment ratio (Rw) | 0.85 | kg/kg | | Suction flow possible | 425 | kg/h | | Diffuser outlet diameter | 32 | mm | | Status | OK / Check | |

Requirement: Remove 200 kg/h of air (suction) from a vacuum column at 0.3 bar abs, compressing to 1.2 bar abs, using 8 bar g steam. ejector design calculation xls

After running through the Excel tool:

The sheet instantly shows if the ejector is feasible in a single stage or needs multiple stages. Here’s a recommended layout for your ejector design

A typical ejector calculation spreadsheet requires the following inputs:

| Parameter | Symbol | Unit | |-----------|--------|------| | Motive fluid pressure (inlet) | P₁ | bar, psi | | Suction fluid pressure | P₂ | bar, psi | | Discharge (back) pressure | P₃ | bar, psi | | Motive fluid flow rate | W₁ | kg/h, lb/h | | Suction fluid flow rate | W₂ | kg/h, lb/h | | Motive fluid density | ρ₁ | kg/m³ | | Suction fluid density | ρ₂ | kg/m³ | | Entrainment ratio | R = W₂/W₁ | dimensionless | Requirement: Remove 200 kg/h of air (suction) from

Calculate the nozzle throat area: [ A_t = \frac\dotm_1\rho_1 \cdot v_t ] where ( v_t ) is critical (sonic) velocity if the pressure ratio exceeds the critical pressure ratio.