Water Cooling Capacity Calculator

Water Cooling Capacity Calculator

The water cooling capacity calculator determines cooling system’s ability to remove heat from a process or equipment with Q = ṁ × Cp × ΔT formula.

In an industrial process cooling a 75kW electric motor, the calculator determine that with a water flow rate of 15 gallons per minute and a temperature rise of 10°C, the system can effectively remove 63kW of heat, indicating additional cooling capacity may be needed.

Data Center Cooling

  • Water flow rate: 20 GPM
  • Temperature difference: 8°C
  • Calculated capacity: 84.3 kW
  • Application: Cooling server racks in a medium-sized data center

Industrial Process Cooling

  • Water flow rate: 30 GPM
  • Temperature difference: 12°C
  • Calculated capacity: 189.7 kW
  • Application: Cooling chemical reactor vessels

HVAC System

  • Water flow rate: 25 GPM
  • Temperature difference: 5°C
  • Calculated capacity: 65.9 kW
  • Application: Building climate control system

Water Cooling Capacity Formula

The formula for calculating water cooling capacity is:

Q = ṁ × Cp × ΔT

Where:

  • Q = Cooling capacity (kW)
  • = Mass flow rate (kg/s)
  • Cp = Specific heat capacity of water (4.186 kJ/kg·°C)
  • ΔT = Temperature difference (°C)

For a flow rate of 10 GPM (0.63 kg/s), with a 6°C temperature difference: Q = 0.63 × 4.186 × 6 = 15.82 kW

How to Calculate Water Cooling Capacity?

  • Measure Initial Parameters:
    • Determine water flow rate using flow meters.
    • Install temperature sensors at inlet and outlet points.
    • Record system pressure and ambient conditions.
  • Convert Units:
    • Transform flow rate to mass flow (kg/s).
    • Ensure temperature readings are in °C.
    • Verify pressure readings for pump calculations.
  • Apply Formula: For a practical example, consider a laboratory cooling system:
    • Flow rate: 5 GPM (0.315 kg/s)Inlet temperature: 20°COutlet temperature: 25°C

Calculation: Q = 0.315 × 4.186 × (25 – 20) = 6.59 kW cooling capacity

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