Heating system for a vehicle and process for heating a vehicle

A vehicle heating system comprising:

• a reaction space containing a first reactant;
• a reactant storage space containing a second reactant or/and receiving the second reactant, wherein the first reactant and the second reactant form a reaction system, the reaction system comprising the second reactant reacting chemically or thermophysically with the first reactant, wherein a reaction of the first reactant with the second reactant produces a reaction product that releases heat and wherein the second reactant is separatable from the first reactant by introducing heat into the reaction product;
• a liquid reactant-releasing/introducing device releasing liquid second reactant from the reactant storage space and introducing the liquid second reactant into the reaction space, the liquid reactant-releasing/introducing device comprising a liquid reactant-releasing/introducing line open towards the reaction space and a valve assembly associated with the liquid reactant releasing/introducing line, the valve assembly being switchable between a releasing status releasing a flow of liquid reactant into the reaction space and a blocking status interrupting the flow of liquid reactant into the reaction space;
• a heat removal device for removing heat from the reaction product contained in the reaction space;
• a heating unit for heating the reaction product contained in the reaction space for splitting the reaction product to separate the first reactant from, and to provide the second reactant in, a gaseous state of aggregation;
• and
• a reactant-recirculating device for recirculating second reactant from the reaction space into the reactant storage space while maintaining the first reactant within the reaction space, the reactant-recirculating device comprising a reactant-recirculating line and a condenser device connected to the reactant-recirculating line for receiving second reactant leaving the reaction space as a gas and for feeding liquid second reactant into the reactant storage space.