Experimental and numerical analysis of flow and heat transfer characteristics of EGR cooler in diesel engine

Heat Transfer Performance Analysis and Optimization of Exhaust Gas Recirculation Cooler with Different Structural Characteristics

“…Because of the implementation of China VI emission standard, all manufacturers are developing diesel engines that satisfy the new emission regulations. EGR systems make the exhaust gas pass through a cooler and valve into the cylinder to burn again, as shown in Figure 1 [1][2][3], which is an important measure to reduce NOx, which is widely applied to diesel engines [4,5].…”

“…In current products, the spiral tubes in Figure 2(a) are commonly used in an EGR cooler, the heat transfer performance of spiral structure was studied by number of researchers [2,[6][7][8]. The heat transfer efficiency was shown in the range of 60 to 80% [2,6,8,9]. According to limited studies of pitted tubes (Figure 2b), it was found that more heat transfer area can enhance the heat transfer efficiency and increase the local turbulence of the fluid level significantly [10].…”

“…But few studies focussed on its application in an EGR cooler. Some studies considered an inner fin ( Figure 2c) structure [2,[11][12][13] to increase heat radiating area, the efficiency was improved by about 20% compared with the spiral tubes. The fin pitch and wave pitch parameters of the inner fin was studied by number of authors [11,13,14] to determine their effects on transfer efficiency, but few studies focussed on the effect of the amplitude parameter in the fin structure.…”

The Effect of Compressible Flow on Heat Transfer Performance of Heat Exchanger by Computational Fluid Dynamics (CFD) Simulation

“…The experimental results were analyzed and the prospect of improving the corrosion resistance of heat exchanger components was introduced. S.S. Hoseini et al [13] numerically investigated the heat transfer characteristics of shell and tube-type EGR intercoolers and stack type-EGR coolers. The results showed that the heat transfer efficiency of stack type-EGR coolers is higher than shell and tube-type EGR intercoolers.…”