Produktvorwärmung with heat pump

Process for hot filling of fluids, in particular juices, with a short-time heater, comprising a first heat exchanger, a filling station for the filling of liquids into containers, for example bottles, and a cooling tunnel which consists of a plurality of cooling cells, for the cooling of the filled container by means of a cooling liquid, for example water, which liquids are heated in the container at the filling station in the pasteuriser before filling by thermal energy of the heated during the cooling the cooling liquid of the cooling tunnel is supplied to the pasteuriser means of a separate heat pump.