This paper investigates the use of polymer and liquid silicon infiltrated carbon/siliconcarbide composite (C-SiC) materials for the development of inexpensive compact heat exchangers, as part of efforts for thermochemical hydrogen production. These heat exchangers will be capable of operating in the temperature range of 500 to 1400°C with highpressure helium, liquid fluoride salts (a potential ...

In this study, the three-dimensional fluid flow and heat transfer in a rectangular micro-channel heat sink are analyzed numerically using water as the cooling fluid. The heat sink consists of a 1-cm silicon wafer. The micro-channels have a width of 57 lm and a depth of 180 lm, and are separated by a 43 lm wall. A numerical code based on the finite difference method and the SIMPLE algorithm is d...

A genetic algorithm based optimisation technique has been developed for crossflow plate-fin heat exchangers using offset strip fins. The algorithm takes care of large number of continuous as well as discrete variables in the presence of given constraints. The optimisation program aims at minimising the number of entropy generation units for a specified heat duty under given space restrictions. ...

Multi-tube multi-fin heat exchangers are extensively used in various industries. In the current work, detailed experimental investigations were carried out to establish flow/heat transfer characteristics three distinct exchanger geometries. A novel perforated plain fin design was developed, and its performance evaluated against standard louvred fins designs. Experimental setups designed, tests ...

Modern portable electronics have seen component heat loads increasing, while the space available for heat dissipation has decreased, both factors working against the thermal designer. This requires that the thermal management system be optimized to attain the highest performance in the given space. While adding fins to the heat sink increases surface area, it also increases the pressure drop. T...

The thermodynamic cycle of an intercooled turbofan engine was optimized by considering various characteristics of intercoolers (ICs). Sixty-three intercooled turbofan engines were optimized using an evolutionary algorithm. Thirty-nine design parameters were analyzed using proper orthogonal decomposition, and the effects of the IC performance on the engine thermodynamic cycle were examined. The ...

Experiments were performed using a flow-loop apparatus to explore the performance of nanofluids in cooling applications. The experiments were performed using exfoliated graphite nanoparticle fibers suspended in polyalphaolefin atmass concentrations of 0.6 and 0.3%.The experimental setup consisted of a test section containing a plain offsetfin cooler apparatus (gap or nongap fin), whichwas conne...