An experimental study has been conducted to evaluate the performance of a compact round-tube louver-fin condenser, each with frontal areas of 0.25 m in both dry and wet conditions. Deluge water cooling is achieved by incorporating a perforated bottom plate-type water distributor on top of the round tube heat exchanger. Water is used as a refrigerant, and enters the heat exchanger tubes at 35°C ...

Recently, multi-gate and nanowire field-effect-transistors (FETs) with three-dimensional (3D) channels have drawing much interest because they have excellent short-channel-effect immunity due to better electrostatic control of the channel potential by gate electrodes. Therefore, the metal-oxide-semiconductor (MOS) transistor with 3D channels has been considered as one of the promising candidate...

Flow boiling of water across a bank of circular staggered micro-pin fins, 250 lm long and 100 lm diameter with pitch-to-diameter ratio of 1.5, was experimentally studied for mass fluxes ranging from 346 kg/m s to 794 kg/m s and surface heat fluxes ranging from 20 W/cm to 350 W/cm. Local temperature measurements were used to elucidate the two-phase heat transfer coefficients. The flow was visual...

This paper presents the comparative performance of several surrogate-assisted multiobjective evolutionary algorithms MOEAs for geometrical design of a pin-fin heat sink PFHS . The surrogate-assisted MOEAs are achieved by integrating multiobjective population-based incremental learning PBIL with a quadratic response surface model QRS , a radial-basis function RBF interpolation technique, and a K...

  Background Recent studies indicate increased serum amylase in children with acute appendicitis. The objective of the current study was to determine the diagnostic accuracy of raised serum amylase level in prediction of perforated appendicitis in children with acute appendicitis. Materials and Methods In this cross-sectional study, 61 children (aged 3 to 15 years) who underwent appendectomy su...

Abstract A reasonable theoretical calculation model is established, and an appropriate correlation formula selected to calculate the flow heat transfer of CO 2 gas flowing through micro-pin fin arrays in a micro-cooler respectively under different working conditions. The inlet pressure 1.0 MPa, 1.5 2.0 MPa respectively, temperature 12 °C 16 respectively. results show that cold end decreases wit...