Cooling device for a condenser of a system for a thermodynamic cycle, system for a thermodynamic cycle, arrangement with an internal combustion engine and a system, vehicle, and a method for carrying out a thermodynamic cycle

Abstract

A cooling device for a condenser of a system for a thermodynamic cycle, with a coolant circuit, wherein a conveying device for conveying a coolant through the coolant circuit is provided, and wherein the coolant circuit includes a cold branch downstream from a cooling point for the coolant and a hot branch upstream of the cooling point. The conveying device has a variable output, and / or the coolant circuit has a connecting line between the hot branch and the cold branch. A mixing device is provided, by way of which a variable portion of coolant can be supplied from the hot branch to the cold branch via the connecting line, bypassing the cooling point.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority of DE 10 2014 206 026.5, filed Mar. 31, 2014, the priority of this application is hereby claimed and this application is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]The invention pertains to a cooling device for a condenser of a system for a thermo-dynamic cycle, to a system for a thermodynamic cycle, to an arrangement consisting of an internal combustion engine and such a system, to a motor-driven vehicle with a corresponding arrangement, and to a method for carrying out a thermodynamic cycle.[0003]Thermodynamic cycles of the type in question here are known as such. A working medium is heated, in particular vaporized, in a vaporizer, and then expanded in an expansion device, wherein heat of the working medium taken up in the vaporizer is converted to mechanical energy. The working medium is then cooled, in particular condensed, in a condenser, and sent back to the vaporizer ag...

AI Technical Summary

Benefits of technology

This patent describes a cooling device for a vehicle's condenser that offers precise control over the cooling capacity regardless of the temperature level of the cooling point. The device includes a conveying device and a mixing device that allows for a variable portion of coolant to be supplied to the cold branch, thus enabling independent adjustment of the cooling capacity. This eliminates the need for a fixed cooling capacity and ensures optimal power yield at all operating points. The conveying device consumes less power than traditional blowers and can be controlled more precisely than air cooling with ambient air. The output of the conveying device and the functional setting of the mixing device are automatically controlled, allowing for a more precise setting of the cooling capacity of the cooling device and the condenser simultaneously.

Problems solved by technology

The disadvantage of this is that the blower has a very high energy demand.

In this case, the cooling capacity available for the condenser is determined, so that the condenser is limited to operation on a certain temperature level and thus at a certain condensation pressure.

This necessarily leads to a performance yield lower than maximum possible yield at many operating points of a system for operating thermodynamic cycles.

If, furthermore, the temperature of the working medium at the outlet from the condenser varies with the operating point of the system as a result of the fixed cooling capacity, it is possible that, at certain operating points and especially in high load ranges of the system, it is impossible to ensure sufficient supercooling of the working medium below its condensation point in the condenser, as a result of which there is the danger that cavitations will occur in the conveying device of the system set up to convey the working medium through the circuit.

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