TY - JOUR
TI - Numerical analysis on the thermal performances of different types of fin heat sink for high-power led lamp cooling
AU - Huang Yicang
AU - Shen Shengnan
AU - Li Hui
AU - Gu Yunjie
JN - Thermal Science
PY - 2019
VL - 23
IS - 2
SP - 625
EP - 636
PT - Article
AB - The efficient cooling is very important for a light emitting diode (LED)  module because both the energy efficiency and lifespan decrease significantly  as the junction temperature increases. Fin heat sinks are commonly used for  cooling LED modules under natural convection conditions. This work proposed  two novel models of fin heat sink, named the pin-plate fin heat sink (PPF)  and the oblique-plate fin heat sink (OPF), by combining plate fins with pin  fins and oblique fins and their thermal performances were studied  numerically. The LED module was assumed to be operated under 1 atmospheric  pressure and its heat input is set to 4 watts. The PPF with 8 plate fins  inside (PPF-8) and the OPF with 7 plate fins inside (OPF-7) show the best  thermal performances among all PPF and OPF designs. Total thermal resistances  of PPF-8 and OPF-7 decreased by 9.0% - 15.6% compared to those of three  original models. And heat transfer coefficients of PPF-8 and OPF-7 were  higher by 12.6% - 35.2% than those of three original heat sinks.