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Power to Weight Ratio Formula:
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The power to weight ratio (pwr) measures the heating power (in kilowatts) per unit of weight (in tons). It's a key metric in evaluating heating system efficiency and capacity relative to the size or weight of the system or space being heated.
The calculator uses the power to weight ratio formula:
Where:
Explanation: The ratio shows how much heating power is available per ton of weight, helping compare systems or determine appropriate heating capacity.
Details: This calculation is crucial for designing heating systems, comparing equipment efficiency, and ensuring proper heating capacity for applications like HVAC systems, industrial processes, or vehicle heating systems.
Tips: Enter the heating power in kilowatts and the weight in tons. Both values must be positive numbers. The calculator will compute the power to weight ratio in kW per ton.
Q1: What is a good power to weight ratio for heating systems?
A: The ideal ratio depends on the application, but typically ranges between 0.5-2 kW/ton for residential HVAC systems.
Q2: How does this differ from cooling power to weight ratios?
A: Cooling ratios often use different metrics (like BTU/hr per ton), but the concept is similar - measuring capacity relative to weight.
Q3: Can this be used for electric heating systems?
A: Yes, the calculation works for any heating system where you know the power output and the relevant weight.
Q4: What if my weight is in kilograms instead of tons?
A: Convert kilograms to tons by dividing by 1000 before using the calculator (1 ton = 1000 kg).
Q5: Is higher always better for power to weight ratio?
A: Not necessarily - while higher ratios indicate more power per unit weight, they may also indicate less efficient systems that require more power.