Heat Exchanger Calculator — Size Your Thermal System Correctly

Heat Exchanger Calculator

Calculate the right heat exchanger size for your application. Understand how flow rates, temperature differences, and materials affect heat transfer requirements.

Step 1: Hot Side Parameters

Understanding Heat Exchanger Sizing

Proper heat exchanger sizing ensures efficient heat transfer. Undersized exchangers won’t meet thermal requirements, while oversized ones waste material and increase costs. The calculation considers flow rates, temperature differences, and fluid properties.

Step 2: Cold Side Parameters

About Heat Transfer Coefficients

The overall heat transfer coefficient (U) depends on fluid properties, flow rates, and exchanger design. Typical values range from 300-1200 W/m²K for liquid-to-liquid systems and 10-300 W/m²K for gas-to-gas systems.

Heat Exchanger Sizing Results

Summary
Exchanger Comparison
Heat Transfer Analysis

Required Heat Transfer Area

12.5 m²
Heat Duty: 1,250 kW
Heat Duty
1,250 kW
Log Mean Temperature
34.8°C
Overall U Value
850 W/m²K
Exchanger Size
Medium

Heat Exchanger Size Comparison

Application Heat Duty Required Area Exchanger Type Typical Cost

Heat Transfer Analysis

Heat Exchanger Calculation Formula

Q = m × Cp × ΔT | A = Q / (U × LMTD)

The heat exchanger area is calculated using the heat transfer equation. Q represents heat duty, m is mass flow rate, Cp is specific heat capacity, ΔT is temperature difference, U is overall heat transfer coefficient, and LMTD is log mean temperature difference.

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