Marine Heat Exchanger Fouling, Cooling Capacity & Cleaning ROI Tool

Ship Universe Marine Cooling Performance Tool

Marine Heat Exchanger Fouling, Cooling Capacity & Cleaning ROI Tool

Quantify lost heat-transfer capacity, cooling margin, pressure-drop penalty and cleaning economics. Advanced mode ranks multiple coolers and lets you build a targeted cleaning package instead of assuming every exchanger should be opened.

Heat Exchanger Thermal Condition

Use clean design duty as the reference condition and enter the added fouling resistance on both sides.

Heat-transfer area

m²

Clean rated cooling duty

Required cooling duty

Clean overall U-value

W/m²K

Hot-side fouling resistance

×10⁻⁴ m²K/W

Cold-side fouling resistance

×10⁻⁴ m²K/W

Cleaning effectiveness

% fouling removed

Pressure Drop & Pumping

Clean pressure drop

kPa

Current pressure drop

kPa

Cooling-water flow

m³/h

Pump efficiency

Operating Economics

Operating days per year

days/year

Cooling-system hours per day

hours/day

Electricity / generated power value

$ /kWh

Cooling shortfall economic exposure

$ /MW-day

Use for derating, supplemental cooling, lost production or other value tied to insufficient duty.

Average benefit retained until next clean

Cleaning Scope & Downtime

Fixed mobilization / access cost

Cleaning cost per area

$ /m²

Cleaning downtime

hours

Vessel / plant time value

$ /day

Planned outage overlap

Re-cleaning interval

years

Analysis horizon

years

Discount rate

Heat Exchanger System

Select the units to clean. The engine ranks each unit by cooling shortfall, U-value degradation and pressure-drop penalty.

Clean?	Exchanger	Area	Clean MW	Req. MW	U Clean	R Hot	R Cold	ΔP Clean	ΔP Now	Flow	Eff.

R Hot and R Cold are entered as ×10⁻⁴ m²K/W. U is W/m²K, ΔP is kPa and flow is m³/h.

Cleaning & Economics

Cleaning effectiveness

Operating days per year

days/year

Cooling-system hours per day

hours/day

Power value

$ /kWh

Cooling shortfall exposure

$ /MW-day

Average benefit retained

Fixed mobilization / access

Cleaning cost per selected area

$ /m²

Cleaning downtime

hours

Vessel / plant time value

$ /day

Planned outage overlap

Re-cleaning interval

years

Analysis horizon

years

Discount rate

Modeling note: clean rated duty is the thermal reference. Available duty is scaled by the calculated U-value ratio, so this is a maintenance and capacity screen rather than a full exchanger rating model with changing process temperatures, fluid properties, phase change or flow distribution.

Enter exchanger condition, cooling demand, pressure drop and cleaning assumptions to build the analysis.

Heat Exchanger Maintenance Decision N/A

Current Cooling Capacity N/A

Cooling Margin N/A

U-Value Loss N/A

Cleaning Payback N/A

Thermal Capacity Recovery Path Clean rating to current fouled capacity, required duty and modeled post-clean recovery

Clean Reference N/A

Rated cooling duty.

›

Current Fouled N/A

›

Required Duty N/A

›

After Selected Cleaning N/A

Fouling Resistance Headroom Current added resistance versus the modeled resistance allowance for required duty

N/A Allowance Used

Cooling Capacity Reserve The vertical marker represents required cooling duty

Pressure Drop & Pumping Penalty Hydraulic penalty and expected recovery from the selected cleaning scope

Cleaning Economics Cleaning spend versus retained annual thermal and pumping benefit

Modeled Cleaning Payback N/A

Retained Benefit N/A

Lifecycle NPV N/A

Net / Year N/A

Cleaning Cost N/A

Cleaning Cadence Cash View Average retained benefit with repeat-cleaning events at the entered interval

Cleaning ROI Sensitivity Payback versus cooling-shortfall value and cleaning effectiveness

Shortfall Value \ Cleaning	80% of Base	Base	110% of Base

Model approach: Udirty = 1 / (1/Uclean + Rhot + Rcold). Available cooling duty is clean rated duty × Udirty/Uclean. Cleaning removes the entered percentage of added fouling resistance. Pressure-drop recovery removes the same share of excess ΔP above the clean reference. Pump power = ΔP × volumetric flow / pump efficiency. Thermal shortfall cost uses the entered value per MW-day. ROI compares the selected cleaning package with the current fouled condition and applies the entered average benefit-retention factor between cleanings.

Engineering and maintenance planning estimate only. Actual duty depends on fluid properties, temperatures, phase behavior, flow distribution, geometry, wall resistance, bypassing and operating point. Fouling may not be uniform, and hydraulic recovery can differ from thermal recovery. Pressure drop can also change because of blockage, valve position, flow changes or instrumentation error. Validate the final cleaning decision with exchanger-specific thermal data, operating measurements, OEM guidance, inspection results and approved cleaning procedures.

Generated by ShipUniverse.com

Results copied

By the ShipUniverse Editorial Team — About Us | Contact