TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: A pipeline connected with the reaction chamber is provided that exhibits a condensation section for water vapor coupled with a heat exchanger, where the condensation section comes in the operating state from the reaction chamber filled with the reactants into the pipeline, and the pipeline supplies a condensate produced at the condensation section into the reaction chamber, and exhibits a buffer section connected with the reaction chamber for receiving gas, and a control element is provided for adjusting the pressure in the pipeline, where the heat exchanger withdraws heat from the water vapor in the pipeline, and the heat removed from the water vapor is transmitted to a heat carrier for transporting the heat to a receiving container or a preliminary container (9) for the reactants, from which the heated reactants are supplied to the reaction chamber. The reactants are supplied into the reaction container from the preliminary container impinged with a pressure via a supplying channel (10) exhibiting a controllable shut-off unit. A device is provided for detecting the amount of heat transmitted to the heat carrier with the heat exchanger. A control unit is provided that controls the control element based on the detected amount of heat transmitted to the heat carrier. The heat carrier is a fluid heat carrier, which is connected with the receiving container or the preliminary container, and also conducted to a line system connected on the heat exchanger. The fluid heat carrier is water, and the line system comprises a controllable connection for supplying water into the line system, and an additional heat exchanger, through which the heat carrier is conducted with a circulation. The control element comprises a pressure limiting valve with an adjustable opening pressure for adjusting the vapor pressure in the reaction chamber, where the pressure limiting valve is arranged in a line section acting as a vapor discharge channel, which opens in a section of the pipeline acting as a control channel for adjusting the required length of the condensation section before the buffer section, where the opening for the line section in the pipeline is arranged in an area of an end section of the condensation section facing the buffer portion, or in an area of the pipeline lying between the condensation section and the buffer section. A compressor is provided for compressed air to fill the section of the pipeline acting as the control channel at least partially with compressed air. A heater is provided for heating the reactant in the reaction chamber. The reaction container is a reaction tower having a belly-shaped bottom section, in which an outlet opening is located for the removal of the reaction product from the reaction chamber, and a neck-shaped upper section, in which an inlet opening of the reaction container is formed, where a rinsing device with at least one outlet opening for rinsing fluid arranged in the area of the wall of the reaction container is provided in the bottom section of the reaction container in such a manner that the reaction product located at the bottom section of the reaction container is transferred in a vortex-like flow with the rinsing fluid flowing from the outlet opening, and rinsed through the outlet opening of the reaction container. The reaction product is supplied to a subsequent container formed as a pressure container from the reaction container via a discharging channel exhibiting the controllable shut-off device. The discharging channel exhibits a section, which is formed as a siphon. The subsequent container is connected with a device for transferring the heat from the subsequent container into the reaction container, the preliminary container and/or the receiving container, from which the heated reactants are supplied to the reaction chamber. The device for transferring the heat comprises: the heat storage device for storing the heat from the subsequent container; and an additional line system for liquid vapor, through which the liquid vapor from the subsequent reservoir is supplied to the reaction container the reaction container, the preliminary container and/or the receiving container, where several heat accumulators thermally coupled with the heat storage medium are arranged in the heat storage container, that comprises the phase change material having a different phase change temperature for storing the heat as the latent heat storage, and are arranged in several consecutive perpendicular planes in the heat storage container at least locally to the heat exchanger pipeline, where the phase change temperature of the phase change material of the heat accumulators increases or at least remains same corresponding to a direction of the successive levels. The heat exchanger pipeline is extended from a head section to a bottom section of the heat storage container, and the phase change temperature of the phase change material of the heat accumulators in the heat storage container increases from bottom to top in the direction of the head section starting from the bottom section. Several heat exchanger pipes extending parallel to each other are formed in the heat storage container, where the heat exchanger pipes connect a distribution chamber with a collecting chamber. The heat storage container is connected with a condensation container via a pipeline connected with the heat exchanger pipeline. The condensation container is arranged below the heat storage container, and the pipeline is protruding towards a bottom section of the condensation container. A compressed air compressor and a vacuum pump are provided for adjusting the pressure in the condensation container. A cooled fin tube for separating condensable gases is arranged between the vacuum pump and the condensation container. Preferred Method: The hydrothermal carbonization method comprises supplying the biomass when falling below a pre-determined filling level of the reaction container, and discharging while exceeding the pre-determined filling level of the reaction product from the reaction chamber.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The phase change material in the heat accumulator is lacitol dihydrate, sorbitol, lactitol and/or mannitol.