TY - JOUR
TI - Thermal characteristics of grooved heat pipe with hybrid nanofluids
AU - Han Woo-Sung
AU - Rhi Seok-Ho
JN - Thermal Science
PY - 2011
VL - 15
IS - 1
SP - 195
EP - 206
PT - Article
AB - In the present study, the specially designed grooved heat pipe charged with  nanofluids was investigated in terms of various parameters such as heat  transfer rate(50-300 W with 50 W interval), volume concentration(0.005%,  0.05%, 0.1%, and hybrid combinations), inclination(5°, 45°, 90°), cooling  water temperature (1°C, 10°C, and 20°C), surface state, transient state and  so on. Hybrid nanofluids with different volume concentration ratios with  Ag-H2O and Al2O3-H2O were used as working fluids on a grooved heat pipe(GHP).  Comparing with the pure water system, nanofluidic and hybrid nanofluidic  system shows greater overall thermal resistance with increasing nano-particle  concentration. Also hybrid nanofluids make the system deteriorate in terms of  thermal resistance. The post nanofluid experimental data regarding GHP show  that the heat transfer performance is similar to the results of nanofluid  system. The thermal performance of a grooved heat pipe with nanofluids and  hybrid nanofluids were varied with driving parameters but they led to worse  system performance.