Estimate tanker cargo discharge rate, pumping time, power demand,
energy use, fuel consumption and berth-time cost. Advanced mode
models multiple discharge stages using cargo density, total
dynamic head, pump efficiency, drive efficiency and optional
pump-power limits.
Currency selector changes display only. No exchange-rate conversion is performed.
Cargo Throughput
Effective pump rate, discharge time and average cargo throughput
Power & Energy
Pump demand, support loads, energy intensity and total MWh
Discharge Economics
Fuel, berth time, carbon and total cargo-discharge operating cost
Cargo & Pumping Capacity
Simple mode uses entered pump flow and power directly.
Use Advanced mode to estimate power from flow, cargo density
and total dynamic head.
m³
t/m³
pumps
m³/h
%
Accounts for throttling, tank sequence, backpressure and other average flow losses.
kW/pump
%
kW
Stripping, Delay & Berth Time
hours
kW
hours
kW
$
/hour
Optional economic value of vessel and berth time. Avoid double-counting costs already included elsewhere.
Fuel & Operating Cost
g/kWh
Use the appropriate generator, hydraulic-power-unit or boiler-equivalent fuel rate for the system being modeled.
$
/MT
$
tCO2/MT fuel
$
/tCO2
%
Cargo & Pump System
Advanced mode estimates pump input power from cargo flow,
density, total dynamic head and pump/drive efficiency.
Each row is modeled as a sequential discharge stage.
t/m³
%
%
kW/pump
Set to 0 to disable power-limit flow checking.
kW
kW
Discharge Stages
Use separate stages for initial high-rate discharge,
reduced-rate tank groups, high-backpressure sections or
final cargo discharge.
Stage
Volume m³
Pumps
Rated Flow / Pump
Flow Util. %
Head m
Stripping & Cargo-Operation Time
hours
kW
hours
Can include pump changeover, valve sequencing, sampling or other non-pumping time.
$
/hour
Fuel, Carbon & Other Cost
g/kWh
Use a generator, HPU or boiler-equivalent fuel rate appropriate to the installed cargo pumping system.
$
/MT
$
tCO2/MT fuel
$
/tCO2
%
Cargo Pumping Results
Simple cargo discharge estimate
Enter cargo data
Enter cargo volume and pumping assumptions to estimate
discharge time, power, fuel use and total operating cost.
Total Cost Sensitivity
Flow performance vs fuel price
Flow \ Fuel Price
-20%
Base
+20%
Model approach:
simple-mode throughput equals operating pumps × rated flow
× flow utilization. Advanced-mode hydraulic power is calculated
from cargo density × gravity × actual flow × total dynamic head.
Required input power then accounts for pump and drive efficiency.
If rated pump power is entered, the tool limits modeled flow when
the calculated power requirement exceeds available drive power.
Fuel-equivalent consumption is derived from total kWh × entered
SFOC. Berth-time cost applies to pumping, stripping and other
entered cargo-operation hours.
Planning estimate only.
Actual tanker discharge rates and power demand depend on cargo
viscosity and temperature, vapor pressure, tank geometry, static
head, terminal backpressure, pipeline diameter and length, valve
configuration, pump curves, NPSH, stripping arrangements, pump
wear, hydraulic or electrical system condition, terminal limits,
simultaneous tank operations and cargo-handling procedures.
Do not use this tool to establish safe pump operating points,
maximum discharge pressure, NPSH margin or approved cargo
handling procedures. Use vessel-specific pump curves, terminal
requirements and approved operating manuals for engineering
and operational decisions.
