1. What is Horsepower Hour to Kilowatt Hour Conversion?

Definition: This calculator converts mechanical energy measured in horsepower-hours to electrical energy measured in kilowatt-hours.

Purpose: It helps in comparing mechanical power systems with electrical systems and estimating energy consumption or production.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E_{kWh} \) — Energy in kilowatt-hours
• \( HP \) — Horsepower rating
• \( t \) — Time duration in hours
• 0.746 — Conversion factor (1 HP = 0.746 kW)

Explanation: The formula converts horsepower to kilowatts (multiplying by 0.746) and then multiplies by time to get energy in kilowatt-hours.

3. Importance of Energy Conversion

Details: This conversion is essential for comparing mechanical and electrical systems, calculating energy costs, and designing hybrid systems.

4. Using the Calculator

Tips: Enter the horsepower rating and time duration in hours. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is 0.746 the conversion factor?
A: 1 horsepower is defined as 550 foot-pounds per second, which equals approximately 0.746 kilowatts.

Q2: Can I use this for electric motors?
A: Yes, this works for both mechanical and electrical horsepower ratings.

Q3: How accurate is this conversion?
A: The conversion is mathematically exact, but real-world efficiency factors may affect actual energy usage.

Q4: What's the difference between HP and kWh?
A: HP measures power (rate of energy use), while kWh measures energy (power × time).

Q5: How does this relate to energy costs?
A: Utility companies charge by kWh, so this helps estimate costs for mechanical systems.