1. What is a Plate Heat Exchanger Calculator?

Definition: This calculator determines the heat transfer rate in a plate heat exchanger using the fundamental heat transfer equation.

Purpose: It helps engineers and technicians estimate 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/m²K)
• \( A \) — Heat transfer area (m²)
• \( \Delta T_{LM} \) — 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 Calculations

Details: Accurate heat transfer calculations ensure proper heat exchanger sizing, energy efficiency, and process optimization in HVAC, industrial, and mechanical systems.

4. Using the Calculator

Tips: Enter the U-value (typically 2000-7000 W/m²K for plate heat exchangers), heat transfer area, and log mean temperature difference. 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 between 2000-7000 W/m²K depending on fluid properties and flow conditions.

Q2: How do I calculate the log mean temperature difference?
A: ΔT_LM = [(T_h,in - T_c,out) - (T_h,out - T_c,in)] / ln[(T_h,in - T_c,out)/(T_h,out - T_c,in)]

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

Q4: Can this calculator be used for other heat exchanger types?
A: The basic equation applies to all heat exchangers, but U-values and correction factors vary by type.

Q5: How accurate is this calculation?
A: It provides a theoretical maximum. Real-world performance may be 10-20% lower due to fouling and other factors.