Apparatus for storing and providing a working medium of a motor vehicle, preferably for storing and providing a liquid for exhaust gas aftertreatment, comprising: a) a container for storing the working medium, preferably a liquid tank, b) a heating device for heating the working medium, c) a discharge device, which is arranged in a predetermined installation position of the container in a lower third of the container, comprising c1) a discharge duct, and c2) a discharge pump for discharging the working medium from the container via the discharge duct, and d) a turbomachine, which is configured to generate a volume flow of the working medium in the interior of the container during its operation, wherein the discharge pump and the turbomachine can be operated independently of each other, e) sensor device for detecting the temperature of the working medium; and f) control device configured to control the volume flow of the working medium generated by the turbomachine on the basis of values detected by the sensor device; wherein the container comprises a first portion (TB I), which is preferably arranged adjacent and/or adjacent to the heating device, and at least one second portion (TB II), which is arranged further away from the heating device than the first portion (TB I), wherein the turbomachine is configured such that a volume flow of the working medium can be generated from the first (TB I) to the second portion (TB II), characterized in that the apparatus is configured in such that a volume flow of the working medium is generated by the turbomachine from the first (TB I) to the second portion (TB II) when the working medium in the first portion (TB I) is in a liquid aggregate state and the working medium in the second portion (TB II) is at least partially in a frozen state; wherein the volumetric flow is proportional to the working medium temperature detected by the sensor device: the lower the detected working fluid temperature, the higher the volume flow generated by the turbomachine is set, in order to accelerate thawing. a) a container for storing the working medium, preferably a liquid tank, b) a heating device for heating the working medium, c) a discharge device, which is arranged in a predetermined installation position of the container in a lower third of the container, comprising c1) a discharge duct, and c2) a discharge pump for discharging the working medium from the container via the discharge duct, and c1) a discharge duct, and c2) a discharge pump for discharging the working medium from the container via the discharge duct, and d) a turbomachine, which is configured to generate a volume flow of the working medium in the interior of the container during its operation, wherein the discharge pump and the turbomachine can be operated independently of each other, e) sensor device for detecting the temperature of the working medium; and f) control device configured to control the volume flow of the working medium generated by the turbomachine on the basis of values detected by the sensor device; wherein the container comprises a first portion (TB I), which is preferably arranged adjacent and/or adjacent to the heating device, and at least one second portion (TB II), which is arranged further away from the heating device than the first portion (TB I), wherein the turbomachine is configured such that a volume flow of the working medium can be generated from the first (TB I) to the second portion (TB II), characterized in that the apparatus is configured in such that a volume flow of the working medium is generated by the turbomachine from the first (TB I) to the second portion (TB II) when the working medium in the first portion (TB I) is in a liquid aggregate state and the working medium in the second portion (TB II) is at least partially in a frozen state; wherein the volumetric flow is proportional to the working medium temperature detected by the sensor device: the lower the detected working fluid temperature, the higher the volume flow generated by the turbomachine is set, in order to accelerate thawing.