Transport vehicle cargo heating system

A transport vehicle, comprising a cargo space provided with a liquid circuit including a heating device for heating a liquid flowing through the liquid circuit; a combustion engine and a generator driven by said engine for generating electric energy for feeding the heating device; a special feature of which is the fact that the transport vehicle includes a liquid circuit for cooling liquid of the combustion engine, which liquid circuit comprises a heat exchanger for giving off heat from the cooling liquid to the liquid in the liquid circuit of the cargo space.