Heat Radiation Calculator

Heat Radiation Formula:

\[ H = 5.72 \times e \times K \times \left(\left(\frac{T1}{100}\right)^4 - \left(\frac{T2}{100}\right)^4\right) \]

Emissivity (e):

(0-1)

Radiating Efficiency (K):

(0-1)

Temperature of Wall 1 (T1):

Temperature of Wall 2 (T2):

Heat Radiation (H):

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1. What is Heat Radiation?

Heat Radiation is the process by which energy in the form of electromagnetic radiation is emitted by a heated surface in all directions and travels directly to its point of absorption at the speed of light.

2. How Does the Calculator Work?

The calculator uses the Heat Radiation formula:

\[ H = 5.72 \times e \times K \times \left(\left(\frac{T1}{100}\right)^4 - \left(\frac{T2}{100}\right)^4\right) \]

Where:

\( H \) — Heat Radiation (W/m²K)
\( e \) — Emissivity (0-1)
\( K \) — Radiating Efficiency (0-1)
\( T1 \) — Temperature of Wall 1 (K)
\( T2 \) — Temperature of Wall 2 (K)

Explanation: The formula calculates the heat radiation between two surfaces based on their temperatures, emissivity, and radiating efficiency.

3. Importance of Heat Radiation Calculation

Details: Accurate heat radiation calculation is crucial for thermal management, energy efficiency analysis, and designing heating/cooling systems in various engineering applications.

4. Using the Calculator

Tips: Enter emissivity and radiating efficiency values between 0-1, temperature values in Kelvin. All values must be valid and positive.

5. Frequently Asked Questions (FAQ)

Q1: What is emissivity?
A: Emissivity is equal to the ratio of emissive power of body temperature and emissive power of black at same temperature. It ranges from 0 to 1.

Q2: What is radiating efficiency?
A: Radiating Efficiency is the efficiency of radiation of a surface, body, metal that how much radiation it produces.

Q3: Why are temperatures divided by 100 in the formula?
A: The division by 100 is part of the standard formulation to simplify calculations and maintain consistent units.

Q4: What are typical emissivity values?
A: Black body: 1.0, Polished metals: 0.05-0.2, Oxidized metals: 0.3-0.7, Non-metallic surfaces: 0.7-0.95.

Q5: What units are used for heat radiation?
A: Heat radiation is measured in Watts per square meter per Kelvin (W/m²K).