화학공학소재연구정보센터
International Journal of Hydrogen Energy, Vol.24, No.10, 1027-1032, 1999
Simulation of hydride heat pump operation
A mathematical model and set of software for computer simulation of operation metal hydride heat pumps (MHHP) are developed. The set of equations includes the non-stationary equations of energy conservation in hydride sorbers taking into account thermal effects at absorption/desorption of hydrogen, heat exchange of sorbers with external heat-carriers and sorber design features (materials and sizes of walls, filters, high-temperature inserts, etc.) Experimental data on equilibrium isotherms are used in metal alloy-hydrogen systems. The various factors (the power of heating, temperature of heat-carriers, heating time, etc.) can be used for operational control of the pump. The results of calculations determine the temporary cyclogram of hydride heat pump operation: temperatures of design units, content of hydrogen in sorbers, pressure of hydrogen, heat hows to external heat-carriers and main power parameters-duration of the cycle, developed thermal power and efficiency. On the basis of variant calculations, there is the operative possibility to investigate an influence of various parameters, defining a construction and operation of the heat pump, which is important at the stage of designing, and at optimisation of operational modes of the pump.