Critical Heat Flux (CHF) Calculator

Calculate Critical Heat Flux (CHF)







Formula

The formula to calculate the Critical Heat Flux (CHF) is:

\[ \text{CHF} = \frac{C \cdot L \cdot \rho_l \cdot \rho_v}{\rho_l - \rho_v} \]

Where:

Definition

Example

Let's say the critical heat flux constant (C) is 0.13, the latent heat of vaporization (L) is 2260 J/kg, the density of the liquid (ρl) is 1000 kg/m³, and the density of the vapor (ρv) is 0.6 kg/m³. Using the formula:

\[ \text{CHF} = \frac{0.13 \cdot 2260 \cdot 1000 \cdot 0.6}{1000 - 0.6} \approx 0.176 \, \text{W/m²} \]

So, the Critical Heat Flux (CHF) is approximately 0.176 W/m².

Extended information about "Critical-Heat-Flux-CHF-Calculator"

Critical Heat Flux Formula

Formula: \( \text{CHF} = q'' = \frac{h_{fg} \cdot \rho_v \cdot g \cdot (\rho_l - \rho_v)}{\sigma} \)

Example: \( \text{CHF} = \frac{2257 \cdot 0.6 \cdot 9.81 \cdot (1000 - 0.6)}{0.072} \)

Pool Boiling CHF (Critical Heat Flux)

Formula: \( \text{CHF} = q'' = C \cdot \Delta T_{sat}^n \)

Example: \( \text{CHF} = 0.13 \cdot 30^{1.7} \)

Heat Flux Calculation Formula

Formula: \( q'' = \frac{Q}{A} \)

Example: \( q'' = \frac{500}{2} \)

Heat Flux to Temperature Calculator

Formula: \( q'' = k \cdot \frac{\Delta T}{L} \)

Example: \( q'' = 0.5 \cdot \frac{100}{0.01} \)

Flow Boiling Critical Heat Flux

Formula: \( \text{CHF} = q'' = G \cdot h_{fg} \cdot \left( \frac{\rho_v}{\rho_l} \right)^{0.5} \)

Example: \( \text{CHF} = 1000 \cdot 2257 \cdot \left( \frac{0.6}{1000} \right)^{0.5} \)