(DE4302900-C2)      A system with force-heat coupling includes a generating device (2, 12) for producing electrical power (output) and which also generates a thermal output from the electrical power; an external load (3) is connected to the generating device; and a thermal load (5) whose heat source is the thermal output taken from the generating device (2, 12).    A load detector (9) ascertains the amount of load at the external electric load (3), and an electric heater (7) driven by the generating device (2, 12) supplies the resultant heat to the thermal load (5). A storage device (102) stores data about the relationship between the load of the generating device (2, 12) and the amount of thermal energy which is recovered from the generating device (2, 12), through the thermal load (5). A computation device (101) computes the electrical power received by the electrical heater (7) in the storage device, and determines when the amount of heat recovered by the electric load (3) from the generating device (2, 12) is less than a given value.    USE -   Heat-engines or fuel cells.    (JP7065849-A)      The system includes a generating equipment (2) coupled to an external electrical load (3). a heat load (5) uses the waste heat generated by the equipment. A detecting apparatus (9) detects the load value of the electrical load.    A heat generating equipment (7), which is driven by the equipment for generating electrical energy, supplies the heat generated to the heat load. A control equipment (10) which includes a CPU (101) and memory (102), controls the heat generating equipment in dependence on the value of the external electrical load, as detected by the detecting apparatus.    USE/ADVANTAGE -   Utilises waste heat as generated from a heat engine or fuel cell, to save energy. The heat load can be driven with first response to possible fluctuations of the external electrical load.    (US5751604-A)      The system includes a generating equipment (2) coupled to an external electrical load (3). a heat load (5) uses the waste heat generated by the equipment. A detecting apparatus (9) detects the load value of the electrical load.    A heat generating equipment (7), which is driven by the equipment for generating electrical energy, supplies the heat generated to the heat load. A control equipment (10) which includes a CPU (101) and memory (102), controls the heat generating equipment in dependence on the value of the external electrical load, as detected by the detecting apparatus.    USE/ADVANTAGE -   Utilises waste heat as generated from a heat engine or fuel cell, to save energy. The heat load can be driven with first response to possible fluctuations of the external electrical load.