Heat Transfer Coefficient For Subcooling Inside Vertical Tubes Calculator

Subcooling Coefficient Formula:

\[ h_{sc\ inner} = 7.5 \times \left(4 \times \frac{M_f}{\mu \times D_i \times \pi}\right) \times \left(\frac{C_p \times \rho_f^2 \times k_f^2}{\mu}\right)^{\frac{1}{3}} \]

Mass Flowrate in Heat Exchanger (Mf):

kg/s

Fluid Viscosity at Average Temperature (μ):

Pa·s

Pipe Inner Diameter in Exchanger (Di):

Specific Heat Capacity (Cp):

J/kg·K

Fluid Density in Heat Transfer (ρf):

kg/m³

Thermal Conductivity in Heat Exchanger (kf):

W/m·K

Inside Subcooling Coefficient (hsc inner):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Subcooling Coefficient Formula?

The Subcooling Coefficient formula calculates the heat transfer coefficient when condensed vapor is further subcooled to lower temperatures in a condenser inside vertical tubes. This is a specialized heat transfer calculation used in thermal engineering applications.

2. How Does the Calculator Work?

The calculator uses the Subcooling Coefficient formula:

\[ h_{sc\ inner} = 7.5 \times \left(4 \times \frac{M_f}{\mu \times D_i \times \pi}\right) \times \left(\frac{C_p \times \rho_f^2 \times k_f^2}{\mu}\right)^{\frac{1}{3}} \]

Where:

\( h_{sc\ inner} \) — Inside Subcooling Coefficient (W/m²·K)
\( M_f \) — Mass Flowrate in Heat Exchanger (kg/s)
\( \mu \) — Fluid Viscosity at Average Temperature (Pa·s)
\( D_i \) — Pipe Inner Diameter in Exchanger (m)
\( \pi \) — Archimedes' constant (3.14159)
\( C_p \) — Specific Heat Capacity (J/kg·K)
\( \rho_f \) — Fluid Density in Heat Transfer (kg/m³)
\( k_f \) — Thermal Conductivity in Heat Exchanger (W/m·K)

Explanation: The formula accounts for fluid properties, flow characteristics, and geometric parameters to determine the heat transfer coefficient during subcooling processes.

3. Importance of Subcooling Coefficient Calculation

Details: Accurate calculation of subcooling coefficients is crucial for designing efficient heat exchangers, optimizing thermal systems, and ensuring proper heat transfer in condensation processes. This helps in energy conservation and system performance improvement.

4. Using the Calculator

Tips: Enter all required parameters with appropriate units. Ensure values are positive and within reasonable physical ranges for accurate results. Use consistent SI units throughout.

5. Frequently Asked Questions (FAQ)

Q1: What is subcooling in heat transfer?
A: Subcooling refers to cooling a liquid below its saturation temperature, which increases the temperature difference available for heat transfer and improves system efficiency.

Q2: When is this formula typically used?
A: This formula is used in condenser design, refrigeration systems, and heat exchanger analysis where subcooling of condensed vapor occurs inside vertical tubes.

Q3: What are typical values for subcooling coefficients?
A: Subcooling coefficients typically range from 1,000 to 50,000 W/m²·K depending on fluid properties, flow conditions, and system geometry.

Q4: Are there limitations to this equation?
A: The equation assumes fully developed turbulent flow and may be less accurate for laminar flow conditions or extreme fluid properties.

Q5: How does pipe diameter affect the subcooling coefficient?
A: Smaller pipe diameters generally increase the heat transfer coefficient due to higher fluid velocities and better mixing, but also increase pressure drop.