An experimental investigation on pool boiling heat transfer enhancement using Cu-Al2O3 nano-composite coating
ABSTRACTPool boiling heat transfer performances of Cu-Al2O3-coated copper surfaces have been studied experimentally for its potential use in heat transfer applications. In the present study, a two-...
Design of Control System for Water Conductance Instrument controlled by LPC2131 MCU which has the control capability of ARM is introduced in this paper,and the problem which is about the temperature excursion is solved.The design adopts the bi-directional pulsed voltage as its source,which reduces the negative of capacitive and polarization effects at the electrodes.Software arithmetic is designed to compensate the offset of temperature coefficients of Water Conductance Instrument.With this method,the signal is digitally corrected by microprocessor based on the compensation coefficients determined from pretest data.The error problem of temperature compensation in the process of water conductivity measurement is better solved.