1. What is the kWh to Heat 1 Litre of Water Calculator?

Definition: This calculator estimates the energy required in kilowatt-hours (kWh) to heat 1 litre of water by a specified temperature change.

Purpose: It helps determine the electrical energy needed for water heating applications in homes, laboratories, or industrial processes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• kWh — Energy required (kilowatt-hours)
• 4.184 — Specific heat capacity of water (kJ/kg·K)
• ΔT — Temperature change (Kelvin or Celsius)
• 3600 — Conversion factor from joules to kWh (3600 kJ = 1 kWh)

Explanation: The formula calculates the thermal energy needed to raise the temperature of 1 litre (1 kg) of water by ΔT degrees.

3. Importance of Energy Calculation

Details: Accurate energy calculations help in sizing water heaters, estimating electricity costs, and designing efficient thermal systems.

4. Using the Calculator

Tips: Simply enter the desired temperature change in Kelvin (or Celsius, as the scale is equivalent for temperature differences). The result shows the kWh needed for 1 litre.

5. Frequently Asked Questions (FAQ)

Q1: Why use Kelvin instead of Celsius?
A: The calculator works with either since ΔT is the same in both scales. Kelvin is specified as it's the SI unit.

Q2: How does this scale for more than 1 litre?
A: Multiply the result by the number of litres. For example, 10 litres would require 10× the calculated kWh.

Q3: What's the efficiency factor?
A: This calculation assumes 100% efficiency. Real systems typically have 70-95% efficiency, so divide by the efficiency factor for actual consumption.

Q4: Does this account for heat loss?
A: No, this is the theoretical minimum energy required. Actual systems need more energy to compensate for heat loss.

Q5: Can I use this for other liquids?
A: No, this is specific to water. Other liquids have different specific heat capacities.