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Heat Flux Density



Complete list of heat flux density units for conversion

  • watt/square meter [W/m^2]
  • 1 kilowatt/square meter = 1000 watt/square meter [W/m^2]
  • 1 watt/square centimeter = 10000 watt/square meter [W/m^2]
  • 1 watt/square inch [W/in^2] = 1550.0031012075 watt/square meter [W/m^2]
  • 1 joule/second/square meter = 1 watt/square meter [W/m^2]
  • 1 kilocalorie (IT)/hour/square meter = 1.1629999999 watt/square meter [W/m^2]
  • 1 kilocalorie (IT)/hour/square foot = 12.5184278205 watt/square meter [W/m^2]
  • 1 calorie (IT)/second/square centimeter = 41868.00000482 watt/square meter [W/m^2]
  • 1 calorie (IT)/minute/square centimeter = 697.8000000803 watt/square meter [W/m^2]
  • 1 calorie (IT)/hour/square centimeter = 11.6300000008 watt/square meter [W/m^2]
  • 1 calorie (th)/second/square centimeter = 41839.999999942 watt/square meter [W/m^2]
  • 1 calorie (th)/minute/square centimeter = 697.3333333314 watt/square meter [W/m^2]
  • 1 calorie (th)/hour/square centimeter = 11.6222222222 watt/square meter [W/m^2]
  • 1 dyne/hour/centimeter = 2.7777777777778E-7 watt/square meter [W/m^2]
  • 1 erg/hour/square millimeter = 2.77778E-5 watt/square meter [W/m^2]
  • 1 foot pound/minute/square foot = 0.2432317156 watt/square meter [W/m^2]
  • 1 horsepower/square foot = 8026.6466174305 watt/square meter [W/m^2]
  • 1 horsepower (metric)/square foot = 7916.8426564296 watt/square meter [W/m^2]
  • 1 Btu (IT)/second/square foot = 11356.526682221 watt/square meter [W/m^2]
  • 1 Btu (IT)/minute/square foot = 189.2754465477 watt/square meter [W/m^2]
  • 1 Btu (IT)/hour/square foot = 3.1545907451 watt/square meter [W/m^2]
  • 1 Btu (th)/second/square inch = 1634246.1784508 watt/square meter [W/m^2]
  • 1 Btu (th)/second/square foot = 11348.93179479 watt/square meter [W/m^2]
  • 1 Btu (th)/minute/square foot = 189.1488632466 watt/square meter [W/m^2]
  • 1 Btu (th)/hour/square foot = 3.1524810541 watt/square meter [W/m^2]
  • 1 CHU/hour/square foot = 5.6782633986 watt/square meter [W/m^2]

Heat transfer coefficients are crucial in understanding how heat energy is transferred between solid and fluid interfaces. This article will delve into the various units used to measure heat transfer coefficients, provide a detailed explanation of conversions between these units, and include a user-friendly conversion widget tool to assist readers in making quick conversions.

Understanding Heat Transfer Coefficient

The heat transfer coefficient (often denoted by hhh) quantifies the heat transfer between a solid surface and a fluid in motion. It is influenced by various factors, including the type of fluid, the nature of the surface, and the flow conditions. The unit of measurement varies depending on the system of units used.

Common Units for Heat Transfer Coefficient

The heat transfer coefficient is measured in different units, depending on the context:

  1. Watts per square meter Kelvin (W/m²·K) – This is the SI unit for heat transfer coefficient. It represents the amount of heat (in watts) transferred through a surface area of one square meter per one degree Kelvin of temperature difference.
  2. British Thermal Units per hour square foot Fahrenheit (BTU/h·ft²·°F) – This unit is commonly used in the United States, particularly in HVAC applications. It expresses the amount of heat in BTUs transferred through a surface area of one square foot for a one-degree Fahrenheit temperature difference.
  3. Calories per second square meter Celsius (cal/s·m²·°C) – This is another unit used primarily in thermal engineering and scientific applications, representing the amount of heat (in calories) transferred through a surface area of one square meter for each degree Celsius of temperature difference.
  4. Kilocalories per hour square meter Celsius (kcal/h·m²·°C) – Similar to calories, this unit is often used in food processing and other industries where large heat transfers are involved.

Popular Conversions

Converting between these units can be essential for engineers, scientists, and HVAC professionals. Below are some of the most commonly searched conversions along with their formulas:

1. Watts per square meter Kelvin to British Thermal Units per hour square foot Fahrenheit

The conversion between these two units can be expressed using the following formula:BTU/h\cdotpft²\cdotp°F=W/m²\cdotpK×0.588\text{BTU/h·ft²·°F} = \text{W/m²·K} \times 0.588BTU/h\cdotpft²\cdotp°F=W/m²\cdotpK×0.588

2. British Thermal Units per hour square foot Fahrenheit to Watts per square meter Kelvin

To convert from BTU/h·ft²·°F to W/m²·K, use:W/m²\cdotpK=BTU/h\cdotpft²\cdotp°F×1.699\text{W/m²·K} = \text{BTU/h·ft²·°F} \times 1.699W/m²\cdotpK=BTU/h\cdotpft²\cdotp°F×1.699

3. Calories per second square meter Celsius to Watts per square meter Kelvin

The conversion between these two units is as follows:W/m²\cdotpK=cal/s\cdotpm²\cdotp°C×4.184\text{W/m²·K} = \text{cal/s·m²·°C} \times 4.184W/m²\cdotpK=cal/s\cdotpm²\cdotp°C×4.184

4. Watts per square meter Kelvin to Calories per second square meter Celsius

To convert from W/m²·K to cal/s·m²·°C, use:cal/s\cdotpm²\cdotp°C=W/m²\cdotpK×0.239\text{cal/s·m²·°C} = \text{W/m²·K} \times 0.239cal/s\cdotpm²\cdotp°C=W/m²\cdotpK×0.239

Practical Applications of Heat Transfer Coefficient

Understanding and accurately calculating heat transfer coefficients are critical in various fields, including:

  • HVAC Systems: In heating, ventilation, and air conditioning systems, heat transfer coefficients help in sizing equipment and ensuring efficient operation.
  • Engineering and Manufacturing: Engineers often calculate heat transfer coefficients to design efficient heat exchangers, ensuring optimal heat transfer rates in industrial processes.
  • Food Processing: In food processing, maintaining the correct temperature is crucial for safety and quality. Knowledge of heat transfer coefficients allows for effective thermal processing.
  • Building Design: Architects and engineers utilize heat transfer coefficients to design energy-efficient buildings that maintain comfortable indoor temperatures.

Conclusion

Heat transfer coefficients are fundamental in thermal management across various industries. Understanding the units of measurement and being able to convert between them is essential for professionals working in engineering, HVAC, and related fields. The provided conversion widget tool simplifies this process, making it easier for users to find the equivalent values quickly.

By including detailed information about the heat transfer coefficient units, popular conversions, and a practical conversion tool, this article aims to serve as a comprehensive resource for anyone needing to understand or work with heat transfer coefficients.