Siemens Aktiengesellschaft

Kathrin Ruhsland

Jörg Lengert

Roland Klaus

Jann Blonn

Norbert Weinberg

Joerg Lengert

Martina Lengert

The invention relates to a thermodynamic circuit with a working medium comprising at least two substances with non-isothermal evaporation and condensation whereby the working medium can decompose above a given temperature. According to the invention, the heat from heat sources at temperatures above the decomposition temperature of the working medium may be made useful with little complexity and with high operational security, whereby the heat from the heat source is transferred in a first step to a hot liquid circuit and, in a second step, from the hot liquid circuit to the circuit with the working medium comprising at least two substances with non-isothermal evaporation and condensation. The heat introduced to the circuit with the working medium comprising at least two substances with non-isothermal evaporation and condensation can be reduced by means of the intermediate hot liquid circuit, such that a decomposition of the working medium can be avoided. Furthermore, the circuit with the working medium comprising at least two substances with non-isothermal evaporation and condensation is embodied as a standardized solution for use with differing heat sources each at differing temperatures, whereby matching to the temperature of the heat source is achieved by means of the intermediate hot liquid circuit.

Method and device for the transfer of heat from a heat source to a thermodynamic cycle with a working medium of at least two substances with non-isothermal evaporation and condensation

The aim of the invention is to increase the efficiency of a gas turbine system. Said aim is achieved by transferring at least one portion of the heat of the waste gases of a gas turbine to a working medium of a thermodynamic circulation process, which comprises at least two substances featuring non-isothermal evaporation and condensation. Said circulation process allows the residual heat of the waste gases to be used for additionally generating electrical or mechanical power, especially at waste gas temperatures ranging from 100 to 200&#xb0; C. Even previously existing systems can be retrofitted in a simple manner with such a circulation process.

Method for increasing the efficiency of a gas turbine system and gas turbine system suitable therefor

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Aisch, Germany

Kathrin Ruhsland