Experiment Investigation on the Liquid Thermal Conductivity of Biodiesel + Diesel Fuel Blends

Recently, biodiesel has received tremendous attention from a lot of scientists as a biodegradable, renewable, and high-potential fuel, which could be used directly or blended with diesel in internal combustion engines. The adequate thermophysics properties of fuel are required to model the process of fuel spray, atomization, and combustion accurately. In this work, five fuel blends containing methyl myristate and n-alkane (N-decane, N-undecane, N-dodecane, N-tridecane, and N-tetradecane) were prepared, and an important transport property—liquid thermal conductivity—was measured through an experimental system constructed based on transient hot-wire theory. The measurement was conducted at temperatures ranging from 292 to 362 K under a pressure of 0.1 MPa with the weight fraction of methyl myristate being nearly 0.2000, 0.4000, 0.6000, and 0.8000 (by weight) in the binary mixtures. Furthermore, the relationship between the experiment results and temperature and mass fraction of methyl myristate was correlated as a polynomial function. The uncertainty of the experiment system is smaller than ±2.0%.