1. What is a Shell and Tube Heat Exchanger Calculator?

Definition: This calculator determines the heat transfer rate in shell and tube heat exchangers using the fundamental heat transfer equation.

Purpose: It helps engineers and technicians calculate the thermal performance of shell and tube heat exchangers.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The product of U, A, and LMTD gives the heat transfer rate between the hot and cold fluids.

3. Importance of Heat Exchanger Calculations

Details: Accurate calculations ensure proper heat exchanger sizing, energy efficiency, and process temperature control.

4. Using the Calculator

Tips: Enter the U value (typically 300-1000 W/m² K for water-water systems), heat transfer area, and LMTD. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is LMTD?
A: Log Mean Temperature Difference is the driving force for heat transfer that accounts for temperature variations along the exchanger.

Q2: How do I determine the U value?
A: U depends on fluids, flow rates, and exchanger design. Typical values range from 50 (gas-gas) to 3000 (condensing steam).

Q3: What affects heat transfer area?
A: Number of tubes, tube diameter, tube length, and baffle arrangement determine the total heat transfer area.

Q4: Can this calculator be used for other exchanger types?
A: The basic equation applies to all exchangers, but LMTD correction factors are needed for non-countercurrent flow.

Q5: What are typical applications?
A: Shell and tube exchangers are used in power plants, refineries, chemical processing, and HVAC systems.