Tanker Cargo Heating Fuel & Cost Calculator

Tanker cargo heating • thermal duty • boiler fuel • heating cost • capacity margin

Tanker Cargo Heating Fuel & Cost Calculator

Estimate heat-up energy, voyage temperature-maintenance duty, fired-heater fuel, circulation-power fuel, cargo-heating cost and available heater margin. Advanced mode builds the heating program segment by segment from tank surface heat loss, ambient conditions and recovered-heat availability.

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Need tank geometry, U-value, waste heat or voyage segments? Click Advanced above.Simple uses an entered target-temperature heat-loss estimate and disclosed planning assumptions for fuel LHV, design margin and CO₂ factor.

ThermalHeat-up + hold

FuelBoiler fuel + cost

CapacityPeak MW screen

Cargo & Temperature

Use cargo-specific thermal-property data where available.

Cargo quantitymetric tonnes

Cargo specific heatkJ/kg·°C

Initial cargo temperature°C

Target cargo temperature°C

Planned heat-up timehours

Temperature-maintenance perioddays after warm-up

Heating Plant & Cost

Heat loss at target temperaturekW useful heat at target condition

Boiler / thermal-heater efficiency% fuel-to-useful-heat

Available useful heating capacityMW available to cargo heating

Heating fuel pricecurrency/MT fuel

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Advanced separates cargo sensible heat, tank/structure warm-up, segment heat loss, recovered heat and circulation power.Use the heating-program register to represent different sea, waiting and port conditions instead of one average voyage temperature.

Cargo Heat-Up Requirement

Cargo quantitymetric tonnes

Cargo specific heatkJ/kg·°C

Initial cargo temperature°C

Target cargo temperature°C

Planned heat-up timehours

Tank / structure warm-up loadGJ additional sensible load

Warm-up ambient temperature°C

Warm-up recovered heat share% of warm-up useful heat

Thermal design margin% on useful heat demand

Tank Heat-Loss Model

Effective heated tank surface aream²

Overall heat-transfer coefficientW/m²·K

Piping / manifold fixed heat losskW

Voyage / Heating Program

Each row calculates tank heat loss from U × area × temperature difference plus piping loss, then applies the row multiplier and recovered-heat share.

Use	Segment	Hours	Ambient °C	Cargo °C	Loss multiplier	Recovered heat %	Heat loss GJ

Heating Plant, Fuel & Power

Boiler / heater efficiency%

Heating fuel lower heating valueMJ/kg = GJ/MT

Heating fuel pricecurrency/MT

Available useful heating capacityMW

Circulation pump electrical loadkW

Pump operating duty%

Generator SFOC for circulation powerg/kWh

Fuel CO₂ factortCO₂/MT fuel

Carbon / compliance valuecurrency/tCO₂

Other cargo-heating OPEXcurrency for heating program

Operating Readiness Checks

Cargo heating limits verifiedCargo instructions / charter requirements checked. Heating coils / exchangers availableValves, traps and circulation path ready. Boiler capacity confirmedOther simultaneous steam users considered. Heat-loss basis vessel-specificU-value / insulation condition supported by vessel data. Recovered heat availability verifiedWaste heat matches engine operating profile. Temperature monitoring plan readyTank temperature trend and heating response tracked.

Stress Cases

Stress cases alter ambient conditions, heat-loss basis, recovered heat and fuel price without changing the entered base case.

Use	Case	Ambient Δ °C	Heat loss %	Recovered heat %	Fuel price %

Heating capacity screenHEATING PLAN FEASIBLEEntered heater capacity retains planning margin.

Total heating cost$0

Heat-up, maintenance and fuel-cost planning result.

Total fuel0 MT

Peak duty0 MW

Capacity use0%

Cost / cargo t$0/t

Thermal Energy BalanceCargo sensible heat, warm-up loss, voyage/holding loss, tank structure and recovered heat.

Cargo sensible heat0 GJ

Heat-loss energy0 GJ

Recovered heat0 GJ

Fired useful heat0 GJ

Heating Duty ProfilePeak useful-heat demand by warm-up and maintenance segment.

Heater Capacity ScreenPeak fired useful-heat duty compared with entered cargo-heating capacity.

Available capacity0 MW

Required peak duty0 MW

Capacity utilization0%

Capacity margin0 MW

0%70% comfortable90% tight100%+

Fuel & Cost ExposureFired-heater fuel, circulation-power fuel, carbon value and other entered heating cost.

Heating Program LedgerPhase-by-phase duration, heat loss, recovered heat and estimated fuel requirement.

Phase	Hours	Ambient	Cargo temp	Gross heat	Recovered	Fuel

Fuel Cost SensitivityTotal heating cost as thermal demand and fuel price move from 80% to 120% of the base case.

Advanced Stress CasesEditable colder-weather, higher-loss, reduced-recovery and fuel-price scenarios.

Switch to Advanced mode for editable stress cases.

Model approach: cargo sensible heat is mass × specific heat × temperature rise. Heat loss is added during warm-up and temperature maintenance. Advanced mode estimates tank loss from U × heated area × cargo-to-ambient temperature difference plus fixed piping loss. A design margin is applied to useful heat demand, recovered heat reduces fired-heater demand, and fuel is derived from fired useful heat, heater efficiency and entered fuel LHV. Circulation electrical demand is converted to generator fuel using entered SFOC.

Planning boundary: this tool does not determine safe cargo temperature, maximum heating rate, cargo compatibility, charterparty responsibility, steam-system operating limits or coil integrity. Use cargo instructions, vessel procedures, heating-system data and contractual requirements for operational decisions.

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