SubZero Stubby — Thermal Design Engine

Environment

Ambient Temp 25°C

Beer Start Temp 25°C

Beer Volume 375 ml

Target Temp 4°C

Humidity 40%

Geometry

Can Shape

Can Height 130 mm

Can Radius 33 mm

CO2 Cartridge

Enable CO2 cooling

Cartridge Mass 16 g

Channel Diameter 1.5 mm

Spiral Turns 8

Orifice Diameter 0.5 mm

Spiral Type

Sealed Lid & Vacuum

Twist-lock sealed lid Vacuum-assist (lid piston)

Vacuum Level 0.40 atm

Expansion bladder

Bladder Volume 15 ml

Bladder Orifice 0.3 mm

Inner Wall

Material

Wall Thickness 0.8 mm

Peltier Module

Enable Peltier

Power 25 W

Base COP 0.60

Heatsink Area 80 cm²

Magnetocaloric (AMR)

Enable magnetocaloric

Gd Mass 40 g

Magnet Field 1.0 T

Cycle Frequency 2.0 Hz

Gd Sphere Dia 0.5 mm

Regen Effectiveness 0.90

Airflow System

Enable natural draft

Intake Ports 4

Port Diameter 6 mm

Channel Type

Venturi Throat Ratio 0.40

Expansion Stages 3

Enable vortex tube (CO2)

Cold Fraction 0.35

Vortex Chamber 8 mm

Enable ejector assist

Entrainment Ratio 2.0

Evaporative Skin

Enable evaporative

Wet Area 200 cm²

Glow Jacket (Premium)

Enable glow jacket

Fluid Volume 30 ml

Insulation

Thickness 8 mm

Material

Beer Temperature vs Time

Cooling Power by System (Watts)

Energy Contribution (kJ)

Wall Cross-Section (to scale)

Results

Time to Target

—

minutes

Final Temperature

—

°C at 20 min

Energy Removed from Beer

—

kJ (need ~33 kJ)

Battery Used

—

kJ of 92 kJ capacity

Cycles per Charge

—

Outer Surface (peak)

—

°C — comfort < 42°C

Heatsink (peak)

—

°C

Thermal Runaway Status

—

firmware protection active > 60°C

Cooling Breakdown

CO2 Contribution

—

Peltier Contribution

—

Magnetocaloric

—

Evaporative (waste heat)

—

Glow Jacket (waste heat)

—

Airflow (draft+venturi)

—

Vortex Tube

—

Ejector Evap Boost

—

System COP

Peltier COP (avg)

—

Magneto COP (avg)

—

Overall System COP

—

Design Metrics

Total Wall Thickness

—

Outer Diameter

—

Estimated BOM Cost

—

AUD at scale

Estimated Weight

—

grams (no beer)

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SubZero Stubby — Thermal Design Engine

Beer Temperature vs Time

Cooling Power by System (Watts)

Energy Contribution (kJ)

Wall Cross-Section (to scale)

CO2 Sealed-Lid Mechanism — How It Works

Geometric Flow Simulation — Channel-Level Thermal Analysis

Magnetocaloric Cooling — Feasibility Proof

⚡ Quick Goal Optimizer

Auto-Design Optimizer — All Configurations LIVE SLIDERS

Layer Build Resolver — Optimal Surface, Texture & Material per Layer

Design Specification Sheet

SubZero Stubby — Thermal Design Engine

Beer Temperature vs Time

Cooling Power by System (Watts)

Energy Contribution (kJ)

Wall Cross-Section (to scale)

CO2 Sealed-Lid Mechanism — How It Works

Geometric Flow Simulation — Channel-Level Thermal Analysis

Magnetocaloric Cooling — Feasibility Proof

⚡ Quick Goal Optimizer

Auto-Design Optimizer — All Configurations LIVE SLIDERS

Layer Build Resolver — Optimal Surface, Texture & Material per Layer

Design Specification Sheet Copy to Clipboard

Design Specification Sheet