Steriliser Energy & Water Savings
What this calculator does:
Estimates hourly and annual water/energy for your current steriliser (“User setup”) and compares against MEFE models using transparent thermodynamic assumptions you can adjust.
Please feel free to contact us to discuss options, sizing, or site conditions:
orders@mefe.com.au
Inputs
Values are validated automatically. Out‑of‑range inputs are clamped and flagged inline.
Your steriliser: specs & dimensions
Affects current setup heat‑loss areas only.
Usage
10W uses sprays/hour × 0.1404 L/spray. MEFE tanks use fixed L/h below.
Prices
Converted internally to $/kL.
Converted internally to $/kWh.
Energy & Water (per hour)
| Metric | CAT 68 10N4 | CAT 6804 | CAT 6801 | CAT 68 10W | User setup |
|---|---|---|---|---|---|
| Heat loss through evaporation (W) | 119.347 | 103.950 | 192.780 | — | 141.750 |
| Heat loss through body (W) | 23.957 | 25.012 | 32.168 | — | 38.062 |
| Water to overcome heat loss (L/h) | 0.00000 | 0.00000 | 0.00000 | 0.00 | 2.20050 |
| Energy to overcome heat loss (Wh/h) | 143.30 | 128.96 | 224.95 | 0.00 | 197.76 |
| Energy to heat process water (Wh/h) | 181.40 | 181.40 | 181.40 | 1175.48 | 431.42 |
| Total water (L/h) | 2.60000 | 2.60000 | 2.60000 | 16.84800 | 4.80050 |
| Total energy (Wh/h) | 324.71 | 310.36 | 406.35 | 1175.48 | 629.18 |
Totals & Estimated Costs (Annual)
| Metric | CAT 68 10N4 | CAT 6804 | CAT 6801 | CAT 68 10W | User setup |
|---|---|---|---|---|---|
| Water (L/yr) | 99840.00 | 99840.00 | 99840.00 | 646963.20 | 184339.29 |
| Energy (kWh/yr) | 12468.74 | 11918.00 | 15603.85 | 45138.62 | 24160.52 |
| Water cost ($/yr) | A$499.20 | A$499.20 | A$499.20 | A$3,234.82 | A$921.70 |
| Energy cost ($/yr) | A$2,743.12 | A$2,621.96 | A$3,432.85 | A$9,930.50 | A$5,315.31 |
| Total cost ($/yr) | A$3,242.32 | A$3,121.16 | A$3,932.05 | A$13,165.31 | A$6,237.01 |
Estimated Savings if Converting
Savings are vs. the current setup using the same usage profile and heating method.
Water Δ: 84,499.29 L/yr
Energy Δ: 11,691.79 kWh/yr
Total Cost Δ: A$2,994.69
Water Δ: 84,499.29 L/yr
Energy Δ: 12,242.53 kWh/yr
Total Cost Δ: A$3,115.85
Water Δ: 84,499.29 L/yr
Energy Δ: 8,556.67 kWh/yr
Total Cost Δ: A$2,304.96
Water Δ: -462,623.91 L/yr
Energy Δ: -20,978.1 kWh/yr
Total Cost Δ: -A$6,928.30
Assumptions, Formulas & Usage
Constants (adjustable)
These defaults reflect typical conditions. You may adjust them for your site; changes update all calculations instantly.
Note: MEFE tanks assume no make‑up water and treat heat‑loss energy as electric. 10W uses fixed sprays/hour × 0.1404 L.
| Model | Low | Medium | Heavy |
|---|---|---|---|
| User setup (current) | |||
| CAT 68 10N4 | 0.2 | 2.6 | 5 |
| CAT 6804 | 0.2 | 2.6 | 5 |
| CAT 6801 | 0.2 | 2.6 | 5 |
MEFE model usage is fixed; only the “User setup (current)” row is editable.
Thermal formulas
Rectangular:
A_open = L × W
A_body = 2(LW + LH + WH) − A_open
Cylindrical:
A_open = πr²
A_body = 2πrH + πr²
Qₑ (W) = q_surface × A_open
Qᵦ (W) = U × A_body
MEFE tanks:
L_over (L/h) = 0
E_over (Wh/h) = (Qₑ + Qᵦ) ← always electric assumption
10W:
L_over (L/h) = 0
E_over (Wh/h) = 0
Current setup:
L_over (L/h) = { Boiler: (Qₑ + Qᵦ) × L_per_Wh , Electric: 0 }
E_over (Wh/h) = { Boiler: L_over × 89.87 , Electric: (Qₑ + Qᵦ) }
E_flow (Wh/h) = { MEFE & 10W: L_proc × 69.77 ,
Current Boiler: (L_proc + L_over) × 89.87 ,
Current Electric: L_proc × 69.77 }
Totals: L_tot = L_over + L_proc; E_tot = E_over + E_flow
H_yr = Units × Hours/day × Days/week × Weeks/year
L_yr = L_tot × H_yr
E_yr (kWh) = (E_tot / 1000) × H_yr
WaterCost = (L_yr / 1000) × priceWater($/kL)
EnergyCost = E_yr × priceEnergy($/kWh)
Saved