Device for the safe performance of a left-rotating thermodynamic circular process by means of a flammable working fluid which is conducted in a closed, hermetically sealed working fluid circuit, having: - the closed working fluid circuit with the flammable working fluid, having at least one compactor for working fluid, at least one relaxing apparatus for working fluid, and at least two heat exchangers (3, 5) for working fluid having in each case two connections (7, 8, 9, 10) for heat exchanger fluids; and - a closed housing consisting of an outer housing part and an inner housing part which encloses all apparatus attached to the closed working fluid circuit, and can enclose further apparatus, wherein the housing is formed from an arrangement of two housing parts nested in one another, wherein the inner housing part is at least partially enclosed by the outer housing part, between the two housing parts an interspace is formed on several sides, and this interspace is filled with a binding agent for working fluid in a capacity with which emerging working fluid can be completely absorbed, characterised in that - both housing parts have five sides closed for gas and one side open for gas, - the sides respectively open for gas are arranged on sides of the nested housing parts (6, 11) which are opposite one another, - on the open side of the inner and the open side of the outer housing part is provided respectively one passage for gas, - the interspace can be flowed through only in the case of an overpressure occurring in the interior of the inner housing part, in that the overpressure has the effect of the outer housing part being pushed apart in a parallel manner with respect to the inner housing part, as a result of which a passage opening is opened for gas from the inner housing part into the interspace, and - the interspace and the passage opening are formed in terms of flow technology such that the flow resistance occurring when throughflow takes place is equal everywhere. - the closed working fluid circuit with the flammable working fluid, having at least one compactor for working fluid, at least one relaxing apparatus for working fluid, and at least two heat exchangers (3, 5) for working fluid having in each case two connections (7, 8, 9, 10) for heat exchanger fluids; and at least one relaxing apparatus for working fluid, and at least two heat exchangers (3, 5) for working fluid having in each case two connections (7, 8, 9, 10) for heat exchanger fluids; and - a closed housing consisting of an outer housing part and an inner housing part which encloses all apparatus attached to the closed working fluid circuit, and can enclose further apparatus, wherein the housing is formed from an arrangement of two housing parts nested in one another, wherein the inner housing part is at least partially enclosed by the outer housing part, between the two housing parts an interspace is formed on several sides, and this interspace is filled with a binding agent for working fluid in a capacity with which emerging working fluid can be completely absorbed, characterised in that can enclose further apparatus, wherein the housing is formed from an arrangement of two housing parts nested in one another, wherein the inner housing part is at least partially enclosed by the outer housing part, between the two housing parts an interspace is formed on several sides, and this interspace is filled with a binding agent for working fluid in a capacity with which emerging working fluid can be completely absorbed, - both housing parts have five sides closed for gas and one side open for gas, - the sides respectively open for gas are arranged on sides of the nested housing parts (6, 11) which are opposite one another, - on the open side of the inner and the open side of the outer housing part is provided respectively one passage for gas, - the interspace can be flowed through only in the case of an overpressure occurring in the interior of the inner housing part, in that the overpressure has the effect of the outer housing part being pushed apart in a parallel manner with respect to the inner housing part, as a result of which a passage opening is opened for gas from the inner housing part into the interspace, and - the interspace and the passage opening are formed in terms of flow technology such that the flow resistance occurring when throughflow takes place is equal everywhere.