Heat generating arrangement, wherein the arrangement comprises: - a heating arrangement arranged to receive aluminium and superheated steam, wherein the heating arrangement is arranged to be heated by superheated steam having a heating arrangement temperature and arranged to melt the aluminium inside the heating arrangement to form liquid aluminium, - an atomizing arrangement arranged at an outer end of the heating arrangement arranged to atomize the liquid aluminium at the outer end of the heating arrangement by using superheated steam exiting the heating arrangement as atomizer; - a reactor connected to the outer end of the heating arrangement in which the liquid atomized aluminium is arranged to react with the superheated steam exiting the heating arrangement to produce aluminium oxide, hydrogen and heat, thereby increasing the temperature of the superheated steam that is not consumed by the reaction with the liquid atomized aluminium in the reactor to a reactor temperature; - a combustion chamber connected to the reactor and to the heating arrangement arranged to receive superheated steam having the reactor temperature and hydrogen, wherein oxygen or air is provided to the combustion chamber from an external oxygen source, an external air supply or from the atmosphere, wherein a heat consumer (4, 25) is arranged in direct connection to the combustion, where: either the hydrogen is spontaneously combusted inside the combustion chamber to increase the temperature of the superheated steam to a heat consumer temperature, where the superheated steam having the heat consumer temperature exchanges heat with a heat exchange medium within the heat consumer, lowering the temperature of the superheated steam to the heating arrangement temperature, or the hydrogen is spontaneously combusted inside the combustion chamber to provide high temperature exhausts to the heat consumer and where superheated steam is continuously added to the heat generating arrangement, wherein a bypass connection is arranged between the reactor and the heating arrangement, allowing superheated steam to bypass the combustion chamber. - a heating arrangement arranged to receive aluminium and superheated steam, wherein the heating arrangement is arranged to be heated by superheated steam having a heating arrangement temperature and arranged to melt the aluminium inside the heating arrangement to form liquid aluminium, - an atomizing arrangement arranged at an outer end of the heating arrangement arranged to atomize the liquid aluminium at the outer end of the heating arrangement by using superheated steam exiting the heating arrangement as atomizer; - a reactor connected to the outer end of the heating arrangement in which the liquid atomized aluminium is arranged to react with the superheated steam exiting the heating arrangement to produce aluminium oxide, hydrogen and heat, thereby increasing the temperature of the superheated steam that is not consumed by the reaction with the liquid atomized aluminium in the reactor to a reactor temperature; - a combustion chamber connected to the reactor and to the heating arrangement arranged to receive superheated steam having the reactor temperature and hydrogen, wherein oxygen or air is provided to the combustion chamber from an external oxygen source, an external air supply or from the atmosphere, wherein a heat consumer (4, 25) is arranged in direct connection to the combustion, where: either the hydrogen is spontaneously combusted inside the combustion chamber to increase the temperature of the superheated steam to a heat consumer temperature, where the superheated steam having the heat consumer temperature exchanges heat with a heat exchange medium within the heat consumer, lowering the temperature of the superheated steam to the heating arrangement temperature, or the hydrogen is spontaneously combusted inside the combustion chamber to provide high temperature exhausts to the heat consumer and where superheated steam is continuously added to the heat generating arrangement, wherein a bypass connection is arranged between the reactor and the heating arrangement, allowing superheated steam to bypass the combustion chamber. either the hydrogen is spontaneously combusted inside the combustion chamber to increase the temperature of the superheated steam to a heat consumer temperature, where the superheated steam having the heat consumer temperature exchanges heat with a heat exchange medium within the heat consumer, lowering the temperature of the superheated steam to the heating arrangement temperature, or the hydrogen is spontaneously combusted inside the combustion chamber to provide high temperature exhausts to the heat consumer and where superheated steam is continuously added to the heat generating arrangement, wherein a bypass connection is arranged between the reactor and the heating arrangement, allowing superheated steam to bypass the combustion chamber.