How is BTU/hr calculated for a heating system?

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The calculation of BTU/hr for a heating system is based on the amount of energy required to heat water over a specific temperature rise over a period of time. In option B, the method states that you multiply the volume of water that has been heated by the temperature rise (the difference between the inlet and outlet temperatures) and then divide by the time taken. This approach provides a direct measure of the heat transfer rate in BTUs.

Here’s how it works:

  1. Volume of Water Heated: This refers to the actual amount of water being heated, typically measured in gallons or liters.

  2. Temperature Rise: The difference between the final temperature and the initial temperature of the water. This is measured in degrees Fahrenheit (or Celsius).

  3. Time Taken: This is how long the heating took, usually measured in hours if you want to express your result in BTU/hr.

Multiplying these three components together provides the total heat added to the water, and dividing by time gives the heat transfer rate expressed in BTUs per hour (BTU/hr).

This calculation aligns with the fundamental principles of thermodynamics and heat transfer, accurately reflecting the real operational characteristics of heating systems. The other options do not directly utilize

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