1. What is a Radiator Heat Loss Calculator?

Definition: This calculator estimates the heat loss from a radiator based on its U-value, surface area, and temperature difference.

Purpose: It helps HVAC professionals and engineers determine the heat output required from radiators for proper room heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Heat loss (Watts)
• \( U \) — U-value (W/m²·K)
• \( A \) — Surface area (m²)
• \( \Delta T \) — Temperature difference between radiator and room (°C)

Explanation: The heat loss is calculated by multiplying the radiator's heat transfer coefficient by its surface area and the temperature difference.

3. Importance of Radiator Heat Loss Calculation

Details: Accurate heat loss calculation ensures proper radiator sizing, energy efficiency, and comfortable room temperatures.

4. Using the Calculator

Tips: Enter the radiator's U-value, surface area, and the temperature difference between the radiator surface and room air. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical U-value for radiators?
A: Standard radiators typically have U-values between 6-12 W/m²·K, depending on material and design.

Q2: How do I measure the surface area of a radiator?
A: Calculate the total exposed surface area including fins and multiply by the number of panels if it's a multi-panel radiator.

Q3: What ΔT should I use for calculations?
A: Use the difference between the radiator's mean surface temperature and the desired room temperature (typically 50-60°C for the radiator and 20°C for the room).

Q4: Does this account for heat loss through walls/windows?
A: No, this calculates only the radiator's heat output. Total room heat loss requires additional calculations.

Q5: How does radiator material affect heat loss?
A: Materials with higher thermal conductivity (like aluminum) generally have higher U-values and better heat transfer.