Evaluation of elliptical finned-tube heat exchanger performance using CFD and response surface methodology

Optimization of Bi2O3, TiO2, and Sb2O3Doped ZnO-Based Low-Voltage Varistor Ceramic to Maximize Nonlinear Electrical Properties

“…The factorial points, which are one unit distance away from the center of the design space, are used to fit the linear and interaction terms. The star points can provide additional levels of the factor for prediction of the quadratic terms, and their distances from the center are  α   unit [19]. The  α   value is equal to (2 n ) 1/4 , where n is the number of factors.…”

A semi-dynamic model of active pipe-embedded building envelope for thermal performance evaluation

“…However, it is also can be used to predict the heat transfer performance of solid and calculate the heat transfer inside the solid, liquid, and the simultaneous heat transfer between them. Many researchers [6,18] used CFD technology to establish numerical simulation model for analyzing the unsteady heat transfer of the ground-coupled heat exchanger of a heat pump system or others. In this paper, CFD method is used to develop a virtual experiment model of pipeembedded building envelopes acting as a virtual experiment rig for validating the semi-dynamic model.…”

Heat transfer enhancement and pressure drop penalty in porous solar heat exchangers: A sensitivity analysis

“…For example, Bovand et al [19] used Response Surface Methodology to optimize a standard Ranque-Hilsch vortex tube refrigerator. In another study, Sun and Zhang [20] evaluated the elliptical finned-tube heat exchanger performance using CFD and response surface methodology. They found that the increase of axis ratio is useful for the overall thermal-hydraulic performance at lower water volumetric flow rate.…”