Bulk Gas Temperature In Dehumidification Calculator

Bulk Gas Temperature Formula:

\[ Tg = \frac{(h1 \times (ti - Tl)) - (hfg \times ky \times (Yg - Yi))}{hg} + ti \]

Liquid Phase Heat Transfer Coefficient (h1):

W/m²·K

Inside Temperature (ti):

Liquid Layer Temperature (Tl):

Enthalpy of Evaporation (hfg):

J/kg·K

Gas Phase Mass Transfer Coefficient (ky):

mol/s·m²

Absolute Humidity of Air(tg) (Yg):

kg/kg

Absolute Humidity (ti) (Yi):

kg/kg

Gas Phase Heat Transfer Coefficient (hg):

W/m²·K

Bulk Gas Temperature (Tg):

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1. What is Bulk Gas Temperature In Dehumidification?

Bulk gas temperature in dehumidification refers to the adiabatic mixing temperature of gas from a given cross section of duct that accurately reflects the average temperature of the moving fluid during dehumidification processes.

2. How Does the Calculator Work?

The calculator uses the Bulk Gas Temperature formula:

\[ Tg = \frac{(h1 \times (ti - Tl)) - (hfg \times ky \times (Yg - Yi))}{hg} + ti \]

Where:

\( h1 \) — Liquid Phase Heat Transfer Coefficient (W/m²·K)
\( ti \) — Inside Temperature (K)
\( Tl \) — Liquid Layer Temperature (K)
\( hfg \) — Enthalpy of Evaporation (J/kg·K)
\( ky \) — Gas Phase Mass Transfer Coefficient (mol/s·m²)
\( Yg \) — Absolute Humidity of Air(tg) (kg/kg)
\( Yi \) — Absolute Humidity (ti) (kg/kg)
\( hg \) — Gas Phase Heat Transfer Coefficient (W/m²·K)

Explanation: The equation calculates the bulk gas temperature by considering heat transfer coefficients, temperature differences, enthalpy of evaporation, mass transfer, and humidity differences in dehumidification processes.

3. Importance of Bulk Gas Temperature Calculation

Details: Accurate bulk gas temperature calculation is crucial for optimizing dehumidification processes, energy efficiency analysis, and proper design of HVAC systems and industrial drying equipment.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of bulk gas temperature in dehumidification?
A: Bulk gas temperature represents the average temperature of the gas mixture and is essential for calculating heat and mass transfer rates in dehumidification processes.

Q2: How does liquid phase heat transfer coefficient affect the calculation?
A: The liquid phase heat transfer coefficient determines how efficiently heat is transferred between the liquid and gas phases, directly impacting the temperature calculation.

Q3: What factors influence the gas phase mass transfer coefficient?
A: The mass transfer coefficient depends on fluid properties, flow conditions, temperature, and the specific geometry of the system.

Q4: Why is enthalpy of evaporation important in this calculation?
A: Enthalpy of evaporation accounts for the energy required for phase change from liquid to vapor, which significantly affects the heat balance in dehumidification.

Q5: Are there limitations to this equation?
A: This equation assumes steady-state conditions and may need adjustments for rapidly changing conditions, extreme temperatures, or non-ideal gas behavior.