GLOBAL AUTOMATION ENGINEERING TOOL

Cold Room Cooling Load Calculator

Bangladesh-oriented preliminary estimation for chiller, freezer and blast/hardening rooms. Default ambient: 35°C / 70% RH.

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1) Room Inputs

ModeRoom setpoint (°C)Units

LengthWidthHeight

Panel thickness (mm)Floor insulated?Internal loads (kW)Fans + lights + people. Use measured/project values when available.

2) Product Inputs

Product type

Load mass (kg)In temp (°C)Target product (°C)

Cooling time (hours)

Product load uses simplified sensible + freezing/latent assumptions. Final design must use verified product properties and pull-down requirements.

3) Door / Ambient

Ambient temperature (°C)Ambient RH (%)

Door opens / dayMinutes per openDoor curtain

Infiltration uses a simplified doorway air-exchange method plus moist-air enthalpy. It is a practical estimate, not CFD.

4) Safety & Output

Safety factor

Total load (design)6.69 kW1.90 TR

Evaporator capacity6.69 kW1.90 TR

Outdoor / condensing unit allowance7.70 kW2.19 TR

Load breakdown

Transmission0.60 kW

Product3.66 kW

Infiltration0.91 kW

Internal0.40 kW

Subtotal5.58 kW

Engineering notes

Room volume: 45.31 m³

Total envelope area: 81.75 m²

Panel U-value estimate: 0.211 W/m²·K

Product energy: 131700 kJ

Door-open time: 0.50 h/day

Suggested coil SST: ≈ -6.0°C

Typical Bangladesh air-cooled condensing design reference: 45–50°C.

Send Result to Engineer

Preliminary engineering estimate only. Final compressor, condenser, evaporator, refrigerant, piping, defrost and electrical selections must be verified by a qualified refrigeration engineer using actual product data, site conditions and manufacturer selection software.