Numerical Simulation Research of Natural Convection Heat Exchanger
In this paper, computer software is employed to simulate the temperature-field and flow-field of AP1000 PRHR HX, and investigate its heat-transferring and flow characteristic. Through comparative analysis of the distribution of temperature-field and flow-field in different locations at the same time, and the change of temperature-field and flow-field in the same location at different times, heat-transferring process and natural convection situation of PRHR HX are deeply understand. It contributes to analyze the natural circulation capacity of PRHR HX, and provides some references for the effective operation of passive residual heat removal system.
Parametric analysis of heat transfer rate of passive residual heat removal heat exchanger submerged in water tank
Abstract The heat transfer performance of a miniaturized passive residual heat removal heat exchanger (PRHR HX) is experimentally investigated. It comprises 42 C-shaped tubes, submerged in a water tank that has a height of 6 m. The average heat flux is measured for various values of the working pressure and mass flow rate of the water inside the tubes. The pressure varies from 5 MPa to 15 MPa, the mass flux varies from 95 kg/(m2 s) to 320 kg/(m2 s), and the inlet temperature varies up to 300 °C. Moreover, the distribution of the heat flux along the tube is analyzed using empirical correlations available in the literature. The predicted heat removal rate of the tubes is in a good agreement with the measured value; the discrepancy is smaller than 4%. These results could be employed for designing PRHR HXs for nuclear reactors.
The application of adsorptive stripping voltammetry for a study of the reaction of human serum albumin with anti-human serum albumin
Abstract Adsorptive stripping voltammetry has been used to study the interaction of human serum albumin with anti-human serum albumin. The adsorptive stripping voltammetric behaviour of both proteins has been optimised with respect to accumulation potential, accumulation time and scan rate. It has been demonstrated that adsorptive stripping voltammetry can be a useful technique for the study of the interaction of these two proteins directly in solution.