Marine Engine Performance Calculator

MARINE ENGINEERING

Marine Engine Performance Calculator

Fuel, SFOC, thermal conditions and operating indicators

Engineering note: use consistent units and measured data. Manufacturer limits and correction curves are engine-specific. Results are estimates and do not replace the approved engine manual.

1. Engine & fuel data

Engine type Fuel type Fuel measurement method Fuel consumed Measurement period (hours) Fuel density (kg/m³) Engine output (kW) Rated power / MCR (kW) Reference SFOC (g/kWh) Fuel LCV (kJ/kg) Distance during measurement period (NM) Daily operating hours

2. Temperature & pressure

Ambient / turbo inlet air (°C) Ambient / turbo inlet pressure (mbar) LT cooling water before CAC (°C) Charge air before cylinders (°C) Charge air entering cooler (°C) Charge air leaving cooler (°C) Cooling water entering cooler (°C) Exhaust temperature actual (°C) Exhaust temperature baseline (°C) Jacket water inlet (°C) Jacket water outlet (°C) Cooling water flow (m³/h) Lubricating oil inlet (°C) Lubricating oil outlet (°C) Measured lube oil use (kg/h)

3. Correction & comparison

Apply Hyundai HiMSEN H17/28 / applicable project-guide ambient correction (only if valid for this engine)

The optional correction uses a project-guide-specific equation. Do not use it for another engine unless its maker confirms applicability.

Baseline / expected FOC (kg/h, optional) FOC baseline deviation threshold (%) EGT deviation alert limit (°C, optional) Maximum exhaust temperature (°C, optional) Maximum jacket-water outlet (°C, optional) Maximum lube-oil outlet (°C, optional) Fuel CO₂ factor (t CO₂ / t fuel) Air flow (kg/s, optional) Air specific heat (kJ/kg·K)

Calculated results

Fuel consumption—kg/h

Daily fuel estimate—tonnes/day

SFOC actual—g/kWh

Engine load—% MCR

Fuel per nautical mile—kg/NM

Estimated CO₂—tonnes/day

Ambient correction factor—factor

Thermal efficiency estimate—% (brake output / fuel LCV)

Cooling-water heat transfer—kW

CAC effectiveness—%

EGT deviation—°C from baseline

Specific lube oil use—g/kWh

Performance flags

Enter data and calculate to view indicators.

Diagnostic flags are screening indicators only. Alarm limits must be configured from the specific engine maker's manual and shipboard procedures.

Logbook note (optional)

Please log in to save records and export PDF reports.

Engine Logbook — recent records

Engine Performance Trends

Formula reference

Fuel mass from volume: mass (kg) = volume (L) × density (kg/m³) ÷ 1000.
FOC rate: consumed fuel mass (kg) ÷ measurement period (h).
SFOC: fuel rate (kg/h) × 1000 ÷ engine output (kW).
Engine load: engine output ÷ rated power × 100%.
Cooling-water heat: mass flow (kg/s) × cp (kJ/kg·K) × temperature rise (K).
CAC effectiveness: (T air-in − T air-out) ÷ (T air-in − T cooling-water-in) × 100%.
Specific lube oil use: lube oil rate (kg/h) × 1000 ÷ output (kW).