watt per square meter kelvin
Heat transfer coefficientexact by definition
The watt per square metre kelvin is the SI unit of the heat transfer coefficient, the h in Newton's law of cooling and the U in the building equation Q = UAΔT: the heat crossing one square metre per kelvin of driving temperature difference. It is the coherent SI combination and its factor of 1 is exact. It is also the reciprocal of RSI.
Watch out: The film coefficient h and the overall coefficient U share this unit but are not the same thing. U bundles the two surface films and every layer in between; h describes one surface alone. Still air gives about 8 W/(m²·K), forced air 25 to 100, flowing water 500 to 10 000, and condensing steam 5000 to 15 000.
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One watt per square meter kelvin in every heat transfer coefficient unit
| 1 | watt per square meter kelvin (W/(m²·K))this unit | |
| 1 | watt per square meter Celsius (W/(m²·°C)) | |
| 0.860421 | kilocalorie per hour square meter Celsius (kcal/(h·m²·°C)) | |
| 0.17611 | BTU per hour square foot Fahrenheit (BTU/(h·ft²·°F)) | |
| 0.001 | kilowatt per square meter kelvin (kW/(m²·K)) | |
| 0.0001 | watt per square centimeter kelvin (W/(cm²·K)) | |
| 0.0000489195 | BTU per second square foot Fahrenheit (BTU/(s·ft²·°F)) | |
| 0.0000239006 | calorie per second square centimeter Celsius (cal/(s·cm²·°C)) |
Solvers that use heat transfer coefficient