Showing 3 results for Radiator
S.d. Oduro,
Volume 2, Issue 3 (7-2012)
Abstract
This thesis looked at the effect of clay and silt soil blocking the heat transfer area of the radiator and its
effect on the engine coolant through the conduct of experiments and a mathematical model developed. The
results indicated that the percentage area covered resulted in a proportional increase of the inlet and outlet
temperatures of the coolant in the radiator. The mathematically model developed also predicted the
experimental data very well. Regression analysis pointed out that every 10% increase area of the radiator
covered with silt soil resulted in an increase of about 17 oC of the outlet temperature of the radiator coolant.
Similarly, using clay as a cover material, 10% of the area covered of the radiator resulted in an increase of
about 20 oC of the outlet temperature of the radiator coolant. Statistical analysis pointed to the fact that the
result obtained for clay, silt and the mathematical model were not significantly different. Thus, irrespective
of the type of material that blocks the radiator surface area, the coolant rises with proportion of the radiator
covered.
Mr Mohammad Fakhari, Mr Ghanbar Ali Sheikhzadeh,
Volume 10, Issue 1 (3-2020)
Abstract
In this experimental study, heat transfer and pressure drop, ΔP, of a coolant nanofluid, obtained by adding alumina nanoparticles to Ethylene Glycol-water mixture (60:40 by mass), in a automotive radiator have been investigated. For this purpose, an experimental setup has been designed and constructed. The experiments have been performed for base fluid and nanofluid with different volume fractions of 0.003, 0.006, 0.009 and 0.012 and under laminar regime with various coolant flow rates of 9, 11 and 13 lit/min and two air velocities of 3.75 and 2.85 m/s. The thermophysical properties have been calculated using the recently presented temperature dependent models. According to the results, the heat transfer and ΔP increase with increasing the coolant flow and nanoparticles volume fraction. Increasing the air velocity causes enhancement of heat transfer. Although Nusselt number decreases when nanofluid is utilized, it enhances as the nanoparticles volume fraction increases. The performance evaluation using nanofluid in the car radiator shows remarkable enhancement in radiator thermal efficiency. However, the ratio of heat transfer rate to the needed pumping power (Merit parameter) decreases.
Ms Ali Ghiasi Noghabi, Dr Mansour Baghaeian, Dr Hamid Reza Goshayeshi,
Volume 13, Issue 3 (9-2023)
Abstract
| In this research, the effect of using three Nano fluids contains graphene oxide (GO), titanium oxide (TiO2) and aluminum oxide (Al2 O3) was analyzed on the heat transfer of the car radiator by experiment in physical conditions on the car engine. Distilled water and ethylene glycol (60:40) as the base fluid was companied with three nanoparticles contain graphene oxide, titanium oxide and aluminum oxide that each one separately with 0.1, 0.2 and 0.3 weight percent and flow rates of 10, 20, 32 and 40 liters per minute were used at normal engine temperature. After the temperature of the radiator cooling fluid reached 90 degrees Celsius and the fan was turned on for one minute, the results showed that increasing the weight percentage of nanoparticles to the base fluid increases the displacement heat transfer coefficient and most increase in the coefficient of heat transfer at 0.3 weight percent to an approximate value of 5.2% in aluminum oxide, 11.9% for titanium oxide and 28.7% for graphene oxide compared to the base fluid was received. With the increase in weight percentage, the pressure drop and Nusselt number increased. The highest percentage increase in the radiator pressure drop for all three Nano fluids with 0.3 weight percentage and 2.2% for aluminum oxide, 3.5% for Titanium oxide and 5.24% for graphene oxide were received. |
