Temperature of Refrigerant Vapour Condensing Film Given Heat Transfer Calculator

Formula Used:

\[ \text{Vapour Condensing Film Temperature} = \frac{\text{Heat Transfer}}{\text{Coefficient of Heat Transfer} \times \text{Area}} + \text{Outside Surface Temperature} \] \[ T_1 = \frac{q}{h \times A} + T_2 \]

Heat Transfer (q):

Watt

Coefficient of Heat Transfer (h):

W/m²·K

Area (A):

m²

Outside Surface Temperature (T₂):

Vapour Condensing Film Temperature (T₁):

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1. What is Vapour Condensing Film Temperature?

The Vapour Condensing Film Temperature is the temperature of refrigerant vapour condensing film, which is a critical parameter in heat transfer calculations for refrigeration and condensation processes.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ T_1 = \frac{q}{h \times A} + T_2 \]

Where:

\( T_1 \) — Vapour condensing film temperature (K)
\( q \) — Heat transfer (W)
\( h \) — Coefficient of heat transfer (W/m²·K)
\( A \) — Area (m²)
\( T_2 \) — Outside surface temperature (K)

Explanation: This formula calculates the temperature of the refrigerant vapour condensing film based on heat transfer rate, heat transfer coefficient, surface area, and outside surface temperature.

3. Importance of Temperature Calculation

Details: Accurate calculation of vapour condensing film temperature is essential for designing efficient heat exchangers, refrigeration systems, and condensation processes in various industrial applications.

4. Using the Calculator

Tips: Enter heat transfer in watts, coefficient of heat transfer in W/m²·K, area in square meters, and outside surface temperature in Kelvin. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of vapour condensing film temperature?
A: It determines the efficiency of condensation processes and affects the overall performance of refrigeration and heat exchange systems.

Q2: How does heat transfer coefficient affect the temperature?
A: Higher heat transfer coefficients result in lower temperature differences between the condensing film and the outside surface.

Q3: What units should be used for input values?
A: Heat transfer in watts (W), coefficient in W/m²·K, area in square meters (m²), and temperatures in Kelvin (K).

Q4: Can this calculator be used for other fluids besides refrigerants?
A: Yes, the formula is generally applicable to any vapour condensing on a surface, though specific properties may vary.

Q5: What are typical values for heat transfer coefficients in condensation?
A: Typical values range from 1000-5000 W/m²·K for film condensation, depending on the fluid and conditions.