1. What is a Plate Heat Exchanger Calculator?

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

Purpose: It helps engineers and technicians determine the thermal performance of plate heat exchangers for various applications.

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 heat transfer rate is calculated by multiplying the overall heat transfer coefficient by the heat transfer area and the log mean temperature difference.

3. Importance of Heat Exchanger Calculation

Details: Proper heat exchanger calculations ensure efficient thermal performance, proper sizing of equipment, and energy savings in industrial processes.

4. Using the Calculator

Tips: Enter the U-value (typically 3000-7000 W/m² K for plate heat exchangers), heat transfer area, and LMTD. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical U-value for plate heat exchangers?
A: U-values typically range from 3000 to 7000 W/m² K depending on fluid properties and flow conditions.

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

Q3: What affects the overall heat transfer coefficient?
A: Fluid properties, flow rates, plate material, fouling factors, and plate geometry all affect U-value.

Q4: How accurate is this calculation?
A: This provides a basic estimate. For precise calculations, consider fouling factors and correction factors.

Q5: Can I use this for other heat exchanger types?
A: The formula applies to all heat exchangers, but U-values differ significantly between types.