IMPROVEMENT OF COOLING EFFICIENCY OF FIRE CONTROL UNITS

The problems of cooling fire alarm systems to ensure the stable operation of electronic components in fire alarm devices have been analyzed. The problem of numerical modeling of a pulsating heat pipe with a closed circuit in the form of two turns with the same dimensions of evaporative, adiabatic and condenser sections is set. A calculation grid and a numerical implementation of a closed-loop pulsating heat pipe model using a Hypermesh software-modeling complex are proposed. It was found that under certain conditions the best performance is demonstrated at a condenser temperature of 10 oC. It was concluded that the coolant phase fraction contours demonstrate the presence of a liquid component and a possible steam plug inside the heat pipe with the laminar nature of the coolant movement, and the value of the Nusselt criterion for the studied temperature range confirms the laminar nature of the coolant movement inside the pulsating heat pipe with a closed circuit.