1. What is a Heat Duty Calculator?

Definition: This calculator determines the heat transfer rate (duty) required for a heat exchanger based on fluid properties and temperature change.

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Heat duty (Watts)
• \( m \) — Mass flow rate (kg/s)
• \( C_p \) — Specific heat capacity (kJ/kg·K)
• \( \Delta T \) — Temperature difference (°C)

Explanation: The heat duty is calculated by multiplying the mass flow rate by the specific heat capacity and the temperature change.

3. Importance of Heat Duty Calculation

Details: Accurate heat duty calculation ensures proper heat exchanger sizing, energy efficiency, and process temperature control.

4. Using the Calculator

Tips: Enter the mass flow rate in kg/s, specific heat capacity (default 4.186 kJ/kg·K for water), and temperature difference in °C. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is heat duty?
A: Heat duty (Q) is the rate of heat transfer required for a process, measured in Watts.

Q2: What's a typical specific heat capacity for water?
A: Water has a specific heat capacity of about 4.186 kJ/kg·K at standard conditions.

Q3: How do I find the mass flow rate?
A: Mass flow rate can be calculated from volumetric flow rate multiplied by fluid density.

Q4: Does this calculator work for any fluid?
A: Yes, but you must use the correct specific heat capacity for your particular fluid.

Q5: Why convert from kJ to W?
A: The calculation yields kJ/s (kW), which is converted to W (1 kW = 1000 W) for standard SI units.