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How to Convert from Degree Fahrenheit second/Btu (th) to Degree Fahrenheit hour/Btu (IT)?
Learn how to convert thermal resistance values from degree Fahrenheit second per Btu (th) to degree Fahrenheit hour per Btu (IT). This guide explains their definitions, use cases, and conversion formula for accurate engineering analysis.
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Degree Fahrenheit second/Btu (th) to Degree Fahrenheit hour/Btu (IT) Conversion Table
| Degree Fahrenheit second/Btu (th) | Degree Fahrenheit hour/Btu (IT) |
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Custom Unit Conversion Table Generator – Instant Printable Conversion Tables
Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.
Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.
| Degree Fahrenheit second/Btu (th) | Degree Fahrenheit hour/Btu (IT) |
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- How to convert from degree Fahrenheit second/Btu (th) to degree Fahrenheit second/Btu (IT)?
What Is This Tool?
This converter transforms thermal resistance measurements from degree Fahrenheit second per Btu (th), a transient heat-transfer unit, into degree Fahrenheit hour per Btu (IT), a steady-state thermal resistance unit. It is designed for use in various engineering contexts involving different heat flow and time units.
How to Use This Tool?
- Enter the value in degree Fahrenheit second per Btu (th) that you want to convert.
- Select the target unit degree Fahrenheit hour per Btu (IT).
- Apply the provided conversion formula or calculate using the conversion rate 0.0002779637.
- Review the converted result in degree Fahrenheit hour per Btu (IT).
- Use the converted value for your steady-state thermal resistance calculations.
Key Features
- Converts thermal resistance using the exact conversion rate between °F·s/Btu (th) and °F·h/Btu (IT).
- Supports applications in transient and steady-state heat transfer calculations.
- Useful in HVAC, building-energy modeling, and thermal-network analysis.
- Based on consistent definitions of British thermal units (Btu) using the International-Table standard.
- Provides practical examples for straightforward conversion understanding.
Examples
- Converting 5 °F·s/Btu (th) results in 0.0013898185 °F·h/Btu (IT) using multiplication by 0.0002779637.
- For 100 °F·s/Btu (th), the equivalent is 0.02779637 °F·h/Btu (IT).
Common Use Cases
- Modeling transient thermal networks of electronics or heat sinks using Btu per second units.
- Performing steady-state heat-flow and temperature drop analyses in HVAC and building-energy contexts with Btu per hour units.
- Comparing and converting thermal resistance values between U.S. customary and SI units for engineering assessments.
Tips & Best Practices
- Ensure consistent unit definitions of heat flow (Btu/s or Btu/h) are maintained during conversions.
- Use this conversion when switching between transient and steady-state thermal resistance calculations.
- Refer to the International-Table Btu definition to avoid inaccuracies.
- Verify that the application scenarios match the assumptions of time scale and heat flow units.
Limitations
- Conversion assumes the use of the International Table Btu for the hour unit.
- Only applies when converting between seconds and hours while keeping heat flow units consistent.
- May not be valid for heat flow rates or scenarios outside Btu per second or Btu per hour units.
- Not intended for comparing non-steady-state and steady-state cases without further context.
Frequently Asked Questions
- What is degree Fahrenheit second per Btu (th)?
- It is a thermal resistance unit measuring the temperature difference in °F per unit heat-flow rate of one Btu per second, used mainly in transient heat-transfer and thermal-circuit calculations.
- When should I convert °F·s/Btu (th) to °F·h/Btu (IT)?
- Use this conversion when changing from transient thermal analyses involving seconds to steady-state calculations involving hours and corresponding heat flow units.
- Is the conversion formula the same for all heat flow units?
- No, this conversion only applies when the heat flow is expressed in Btu per second or Btu per hour and assumes use of the International Table definition of the Btu.
Key Terminology
- Degree Fahrenheit second per Btu (th)
- A thermal resistance unit indicating temperature difference in °F per heat flow rate of one Btu per second, used in transient heat transfer.
- Degree Fahrenheit hour per Btu (IT)
- A U.S. customary thermal resistance unit that measures steady-state temperature difference in °F produced per heat flow of one Btu per hour, using the International-Table Btu.
- International-Table Btu
- A standard definition of the British thermal unit used for heat flow measurements in thermal resistance calculations.