Coincident Thermal Load, Normal Capacity, Largest-Chiller-Out, Reserve Margin, Chilled-Water Flow, Pump N-1 & Plant Electrical Demand

Naval Chilled Water Plant Load, Cooling Margin & Redundancy Tool

Screen whether a shipboard chilled-water plant can carry the coincident cooling load, preserve the entered reserve target, survive loss of the largest available chiller and still circulate the required chilled-water flow. Advanced mode separates critical and shedable loads, multiple chiller groups, pump redundancy, fluid properties and estimated plant electrical demand.

Data type
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Need critical-load and plant-lineup detail? Click Advanced above.Add thermal load groups and multiple chiller groups, choose whether N-1 must support total or critical cooling load, then screen normal/N-1 chiller capacity, pump flow redundancy and estimated electrical demand.

Fast Chilled-Water Capacity & N-1 Screen

The reserve target and N-1 criterion are project inputs. The tool does not assume every naval platform uses the same redundancy requirement.

kW thermal.
% added to peak load.
kW thermal.
% of rating.
% of available cooling capacity to remain unused.
m³/h.
°C.
°C.

System, Fluid & Redundancy Basis

°C.
°C.
kg/m³, adjust for glycol mixture if applicable.
kJ/kg·K.
% after row-level diversity.
% of available cooling capacity held in reserve.
% added to calculated required flow.

Thermal Load Register

Critical and shedable flags are planning inputs. A load can be critical and not shedable, non-critical and shedable, or configured to match the vessel's actual cooling-priority logic.

Cooling load groupQtyCooling kW / unitDiversity %Critical?Shedable?

Chiller Plant Register

Normal online quantity controls the operating lineup. N-1 removes the single largest derated chiller that is actually online in the modeled condition.

Chiller groupInstalled qtyNormally onlineRated cooling kW / unitCapacity available %Full-load electrical kW / unit

Chilled-Water Pump Lineup

m³/h.
%.
kW.

Cooling-Plant Readiness

Cooling-plant screening only: this tool does not replace the approved thermal load analysis, chilled-water hydraulic network model, chiller OEM performance map, condenser/heat-rejection analysis, electrical load balance, control logic review, survivability assessment or vessel-specific naval/class design criteria. N-1 and reserve targets remain explicit user inputs.
Naval chilled-water context: NAVSEA maintenance documentation identifies chilled water among shipboard services needed by combat-system suites on applicable ship classes, and NAVSEA's Thermal Management Control System initiative is designed to monitor compartment temperature and determine an efficient AC-plant lineup. Marine classification rules also apply cooling-system redundancy in specific contexts, so the required reserve and casualty criteria should come from the vessel's actual design basis rather than a generic assumption. NAVSEA Thermal Management Control System · NAVSEA JFMM Volume II · ABS Rules & Guides
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