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# Ammonia - Thermal Conductivity at Varying Temperature and Pressure

## Online calculator, figures and tables showing thermal conductivity of liquid and gaseous ammonia at temperatures ranging -70 to 425 °C (-100 to 800 °F) at atmospheric and higher pressure - Imperial and SI Units

Thermal conductivity is a material property that describes ability to conduct heat. Thermal conductivity can be defined as

"the quantity of heat transmitted through a unit thickness of a material - in a direction normal to a surface of unit area - due to a unit temperature gradient under steady state conditions".

Thermal conductivity most common units are W/(m K) in the SI system and Btu/(h ft °F) in the Imperial system.

Tabulated values and thermal conductivity units conversion are given below the figures.

### Online Ammonia Thermal Conductivity Calculator

The calculator below can be used to calculate the thermal conductivity of ammonia at given temperatures and pressure.
The output conductivity is given as mW/(m K), Btu(IT)/(h ft °F) and kcal(IT)/(h m K).

Temperature

Choose the actual unit of temperature: °C  °F  °R
Choose the actual pressure:  1 bara / 14.5 psia; 10 bara / 145 psia; 50 bara / 725 psia; 100 bara / 1450 psia;

See also other properties of Ammonia at varying temperature and pressure: Density and specific weight, Dynamic and kinematic viscosity, Prandtl Number, Thermal Conductivity, and Thermophysical properties at standard conditions and Vapour pressure at gas-liquid equilibrium
as well as thermal conductivity o

Ammonia thermal conductivity at given temperatures and pressures:

For full table with Thermal Conductivity - rotate the screen!

 State Temperature Pressure Thermal conductivity [K] [°C] [°F] [MPa] [bara] [psia] [mW/m K] [kcal(IT)/(h m K)] [Btu(IT)/(h ft °F)] Liquid 200 -73.2 -99.7 0.1 1 15 803.2 0.6907 0.4641 239.56 -33.6 -28.5 0.1 1 15 666.6 0.5731 0.3851 Gas 239.56 -33.6 -28.5 0.1 1 15 20.96 0.01802 0.01211 300 26.9 80.3 0.1 1 15 25.10 0.02158 0.01450 400 126.9 260.3 0.1 1 15 37.22 0.03200 0.02150 500 226.9 440.3 0.1 1 15 53.12 0.04567 0.03069 600 326.9 620.3 0.1 1 15 68.61 0.05899 0.03964 700 426.9 800.3 0.1 1 15 78.31 0.06734 0.04525 Liquid 200 -73.2 -99.7 1 10 145 804.2 0.6915 0.4647 298.05 24.9 76.8 1 10 145 485.8 0.4177 0.2807 Gas 298.05 24.9 76.8 1 10 145 26.15 0.02248 0.01511 300 26.9 80.3 1 10 145 26.31 0.02262 0.01520 400 126.9 260.3 1 10 145 38.09 0.03275 0.02201 500 226.9 440.3 1 10 145 53.75 0.04622 0.03106 600 326.9 620.3 1 10 145 69.12 0.05944 0.03994 700 426.9 800.3 1 10 145 78.75 0.06771 0.04550 Liquid 200 -73.2 -99.7 5 50 725 808.6 0.6953 0.4672 300 26.9 80.3 5 50 725 487.6 0.4192 0.2817 362.03 88.9 192.0 5 50 725 313.9 0.2699 0.1814 Gas 362.03 88.9 192.0 5 50 725 41.69 0.03585 0.02409 400 126.9 260.3 5 50 725 45.73 0.03932 0.02642 500 226.9 440.3 5 50 725 57.29 0.04926 0.03310 600 326.9 620.3 5 50 725 71.79 0.06173 0.04148 700 426.9 800.3 5 50 725 80.94 0.06960 0.04677 Liquid 200 -73.2 -99.7 10 100 1450 814.0 0.6999 0.4703 300 26.9 80.3 10 100 1450 496.5 0.4269 0.2869 398.32 125.2 257.3 10 100 1450 218.7 0.1881 0.1264 Gas 398.32 125.2 257.3 10 100 1450 101.0 0.08688 0.05838 400 126.9 260.3 10 100 1450 95.5 0.08208 0.05515 500 226.9 440.3 10 100 1450 63.9 0.05496 0.03693 600 326.9 620.3 10 100 1450 76.1 0.06539 0.04394 700 426.9 800.3 10 100 1450 84.2 0.07243 0.04867 Liquid 300 26.9 80.3 100 1000 14504 622.9 0.5356 0.3599 400 126.9 260.3 100 1000 14504 432.0 0.3714 0.2496 500 226.9 440.3 100 1000 14504 305.7 0.2628 0.1766 600 326.9 620.3 100 1000 14504 234.8 0.2019 0.1357 700 426.9 800.3 100 1000 14504 196.0 0.1686 0.1133 300 26.9 80.3 500 5000 72519 989.0 0.8504 0.5714 400 126.9 260.3 500 5000 72519 804.1 0.6914 0.4646 500 226.9 440.3 500 5000 72519 674.0 0.5795 0.3894 600 326.9 620.3 500 5000 72519 582.6 0.5010 0.3366 700 426.9 800.3 500 5000 72519 511.6 0.4399 0.2956 300 26.9 80.3 1000 10000 145038 1324 1.1384 0.7650 400 126.9 260.3 1000 10000 145038 1139 0.9793 0.6580 500 226.9 440.3 1000 10000 145038 996.5 0.8568 0.5758 600 326.9 620.3 1000 10000 145038 887.7 0.7633 0.5129 700 426.9 800.3 1000 10000 145038 797.3 0.6855 0.4606

Thermal conductivity units conversion:

Thermal conductivity unit converter

british thermal unit(international)/(foot hour degree fahrenheit) [Btu(IT)/(ft h°F], british thermal unit(international)/(inch hour degree fahrenheit) [Btu(IT)/(in h°F], british thermal unit(international)*inch/(square foot*hour*degree fahrenheit) [(Btu(IT) in)/(ft² h°F)], kilocalorie/(meter hour degree celcius) [kcal/(m h°C)], joule/(centimeter second degree kelvin) [J/(cm s K)], watt/(meter degree kelvin) [W/(m°C)],

• 1 Btu(IT)/(ft h°F) = 1/12 Btu(IT)/(in h°F) = 0.08333 Btu(IT)/(in h°F) = 12 Btu(IT)in/(ft2 h°F) = 1.488 kcal/(m h°C) = 0.01731 J/(cm s K) = 1.731 W/(m K)
• 1 Btu(IT)/(in h°F) = 12 Btu(IT)/(ft h°F) = 144 Btu(IT)in/(ft2 h°F) = 17.858 kcal/(m h°C) = 0.20769 J/(cm s K)= 20.769 W/(m K)
• 1 (Btu(IT) in)/(ft² h°F) = 0.08333 Btu(IT)/(ft h°F) = 0.00694 Btu(IT)/(in h°F) = 0.12401 kcal/(m h°C) = 0.001442 J/(cm s K) = 0.1442 W/(m K)
• 1 J/(cm s K) = 100 W/(m K) = 57.789 Btu(IT)/(ft h°F) = 4.8149 Btu(IT)/(in h°F) = 693.35 (Btu(IT) in)/(ft² h°F) = 85.984 kcal/(m h°C)
• 1 kcal/(m h°C) = 0.6720 Btu(IT)/(ft h°F) = 0.05600 Btu(IT)/(in h°F) = 8.0636 (Btu(IT) in)/(ft2 h°F) = 0.01163 J/(cm s K) = 1.163 W/(m K)
• 1 W/(m K) = 0.01 J/(cm s K) = 0.5779 Btu(IT)/(ft h°F) = 0.04815 Btu(IT)/(in h°F) = 6.9335 (Btu(IT) in)/(ft² h°F) = 0.85984 kcal/(m h°C)

## Related Topics

• Fluid Mechanics - The study of fluids - liquids and gases. Involves velocity, pressure, density and temperature as functions of space and time
• Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more
• Thermodynamics - Effects of work, heat and energy on systems
• Air Conditioning - Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort

• en:

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## Citation

• Engineering ToolBox, (2018). Ammonia - Thermal Conductivity at Varying Temperature and Pressure. [online] Available at: https://www.engineeringtoolbox.com/ammonia-thermal-conductivity-gas-liquid-temperature-pressure-d_2014.html [Accessed Day Mo. Year].

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