(WO9209115-A1)      A closed loop reactant product management system for electrochemical galvanic energy devices comprises: (a) modular package comprising galvanic cells, 2 internal gas flow conduits carrying each of 2 gaseous reactants, which form a liquid prod. within the cells and an internal liquid flow conduit for carrying a cooling liquid to the cells, the cooling liquid being derived from the liquid prod., (b) 2 gas supply connections to provide make-up gaseous reactants to the system, (c) indirect heat exchanger means in fluid flow connection with the internal liquid flow conduit, (d) 2 liquid-gas separators and 2 liquid reservoirs respectively in open fluid flow connnection, the reservoirs being designed to provide a liquid-free, gas filled space in the upper portion while maintaining liquid in the lower portion, the first reservoir being in pressure-tight fluid flow connection with the heat exchanger and with the respective internal liquid flow passage, each of the reservoirs being in pressure-tight flow connection with the respective gas supply connections, and the liquid gas separators being in presure tight fluid flow connection with the respective gas flow conduits; gas repressurisation means between each of the gas flow conduits and the respective liquid-gas separators, designed to increase the pressure of gas from the internal gas flow conduit.    Pref. the system further comprises a central microprocessor linked to a monitor and a control system.    USE/ADVANTAGE -   Low temp. H2-O2 fuel cell requiring cooling water and gas flow management, which is provided in a simple and self-adjusting manner. All reactants and products are maintained within the system without loss. Useful for submarine or aircraft applications.    (JP6502511-W)      A closed loop reactant product management system for electrochemical galvanic energy devices comprises: (a) modular package comprising a plurality of galvanic cells, 2 internal gas flow conduits for independently carrying each of 2 gaseous reactants, which form a liquid prod. within the galvanic cells and an internal liquid flow conduit for independently carrying a cooling liquid to the galvanic cells the cooling liquid being derived from the liquid prod. (b) 2 gas supply connections to provide make-up gaseous reactants to the system, (c) indirect heat exchanger means in fluid flow connection with the internal liquid flow conduit. (d) 2 liquid-gas separators and 2 liquid reservoirs respectively being in open fluid flow connection, with the reservoirs being designed to provide a liquid-free, gas filled space in the upper portion while maintaining liquid in the lower portion, the first reservoir being in pressure-tight fluid flow connection with the heat exchanger and with the respective internal liquid flow passage, each of the reservoirs being in pressure-tight flow connection with the respective gas supply connections, and the liquid gas separators being in pressure tight fluid flow connection with the respective gas flow conduits; gas repressurisation means between each of the gas flow conduits and the respective liquid-gas separators, designed to increase the pressure of gas from the internal gas flow conduit.    Pref. the system further comprises a central microprocessor linked to a monitor and a control system.    USE/ADVANTAGE -   Low temp. H2-02 fuel cell requiring cooling water and gas flow management, which is provided in a simple and self-adjusting manner. All reactants and products are maintained within the system without loss. Useful for submarine or aircraft applications.