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Thermal Conductivity of n-Pentadecane (C15H32)

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Abstract

An apparatus based on the transient short-hot-wire method was constructed for obtaining the thermal conductivity of fluids. The apparatus was verified by using toluene before the experiment. Thermal conductivity of the liquid n-pentadecane (C15H32) was acquired in this paper. The temperature range of the experimental system is from 317 K to 577 K, and pressure range is from 1 MPa to 20 MPa. Thermal conductivities of n-pentadecane were correlated as a function of temperature and pressure. And the absolute average deviation and maximum deviation of experimental data from values calculated by polynomial are 1.23 % and 5.34 %, respectively. The uncertainty of thermal conductivity over all measurements is less than 2 %. At last, the thermal conductivities of n-pentadecane in this work were compared with the literature data.

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Abbreviations

q :

Heat power per unit length of hot wire

a :

Thermal diffusivity

\( \rho \) :

Density

c :

Isobaric heat capacity

t :

Elapsed time

r 0 :

Radius of hot wire

P :

Pressure

T :

Temperature

R eff :

Resistance of actual short-hot-wire

\( T_{i}^{'} \) :

The temperature at the end of the last time step at node i Fourier transform value

\( \Delta t \) :

The discrete time step

a 0–a 7 :

Fitting parameters

b 1–b 3 :

Fitting parameters

λ :

Thermal conductivity

λ exp :

Measured thermal conductivity

λ ref :

Thermal conductivity from reference

λ cal :

Calculated thermal conductivity

f:

Fluid to be measured

w:

Short-hot-wire

i :

Correction terms

exp:

Experimental data

ref:

Data from reference

cal:

Calculated value

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Acknowledgments

We acknowledge the support of the National Natural Science Foundation of China (Grant No. 51676160) and the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (No. 51721004).

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Authors and Affiliations

  1. MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi’an Jiaotong University, Xi’an, 710049, Shaanxi, China

    Xiaoyang Zeng, Xiaoming Zhao & Hanwei He

  2. Beijing Key Laboratory of Research and Application for Aerospace Green Propellants, Beijing Institute of Aerospace Testing Technology, Beijing, 100074, China

    Chuanqi Yao

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Correspondence to Xiaoming Zhao.

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Zeng, X., Yao, C., Zhao, X. et al. Thermal Conductivity of n-Pentadecane (C15H32). Int J Thermophys 40, 72 (2019). https://doi.org/10.1007/s10765-019-2537-x

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