1. What is a Heat Exchanger Area Calculator?

Definition: This calculator estimates the required heat transfer area based on heat transfer rate, overall heat transfer coefficient, and log mean temperature difference.

Purpose: It helps engineers and technicians design and evaluate heat exchangers for various industrial applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( A \) — Heat transfer area (m²)
• \( Q \) — Heat transfer rate (W)
• \( U \) — Overall heat transfer coefficient (W/m² K)
• \( LMTD \) — Log mean temperature difference (K)

Explanation: The heat transfer rate is divided by the product of the overall heat transfer coefficient and LMTD to determine the required heat transfer area.

3. Importance of Heat Exchanger Area Calculation

Details: Proper area estimation ensures efficient heat transfer, optimal equipment sizing, and cost-effective heat exchanger design.

4. Using the Calculator

Tips: Enter the heat transfer rate in watts, overall heat transfer coefficient (default 500 W/m² K), and LMTD (default 20 K). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical U value for heat exchangers?
A: U values vary widely (50-2500 W/m² K) depending on fluids and exchanger type. Water-to-water is typically 800-1500 W/m² K.

Q2: How is LMTD calculated?
A: LMTD = (ΔT₁ - ΔT₂) / ln(ΔT₁/ΔT₂), where ΔT₁ and ΔT₂ are temperature differences at each end.

Q3: When would I need to adjust the U value?
A: Adjust for different fluid combinations, flow arrangements (parallel/counter), or fouling conditions.

Q4: Does this work for all heat exchanger types?
A: This basic formula works for simple cases. Complex geometries may require correction factors.

Q5: How accurate is this calculation?
A: It provides a preliminary estimate. Detailed design requires more comprehensive analysis.