1. What is a Litres to kWh Calculator?

Definition: This calculator converts the volume of water in litres to energy in kilowatt-hours (kWh) based on heating requirements.

Purpose: It helps estimate the energy needed to heat water for various applications like heating systems, industrial processes, or domestic hot water.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( kWh \) — Energy in kilowatt-hours
• \( litres \) — Volume of water in litres
• \( \rho \) — Density of water (kg/L)
• \( c \) — Specific heat capacity of water (J/kg·K)
• \( \Delta T \) — Temperature change (K)

Explanation: The formula calculates the energy required to heat a given volume of water by a specified temperature difference.

3. Importance of Energy Calculation

Details: Accurate energy calculations help in system design, energy efficiency planning, and cost estimation for heating applications.

4. Using the Calculator

Tips: Enter the water volume in litres, water density (default 1.0 kg/L), specific heat capacity (default 4186 J/kg·K for water), and temperature change in Kelvin. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the specific heat capacity important?
A: It represents how much energy is needed to raise the temperature of 1 kg of substance by 1°C. Water has a relatively high heat capacity.

Q2: What's the conversion factor 3.6×10⁶?
A: This converts joules to kWh (1 kWh = 3.6 million joules).

Q3: Can I use this for other liquids?
A: Yes, but you'll need to adjust the density and specific heat capacity values accordingly.

Q4: How do I convert °C to Kelvin for ΔT?
A: The size of 1°C equals 1K, so the numeric value remains the same (ΔT of 10°C = 10K).

Q5: Does this account for heat losses?
A: No, this calculates theoretical minimum energy. Real-world systems will require more energy due to inefficiencies.