Steam generator for a rankine cycle

A steam generator system, comprising:

• a first steam generator comprising a first steam generator heat exchanger, a first steam generator heat exchanger channel in which the first steam generator heat exchanger is arranged, a first steam generator bypass channel for bypassing the first steam generator heat exchanger channel, heating fluid flowing through the first steam generator heat exchanger channel and the first steam generator bypass channel during the operation of the first steam generator and medium to be evaporated flowing through the first steam generator heat exchanger during the operation of the first steam generator, wherein the first steam generator heat exchanger channel envelops the first steam generator bypass channel;
• and
• a second steam generator comprising a second steam generator heat exchanger, a second steam generator heat exchanger channel in which the second steam generator heat exchanger is arranged, a second steam generator bypass channel for bypassing the second steam generator heat exchanger channel, heating fluid flowing through the second steam generator heat exchanger channel and the second steam generator bypass channel during the operation of the steam generator and medium to be evaporated flowing through the second steam generator heat exchanger during the operation of the second steam generator, wherein the second steam generator heat exchanger channel envelops the second steam generator bypass channel, wherein the first steam generator and the second steam generator are arranged next to one another and essentially fluidically in parallel to one another;
• an inlet coupling element on a system inlet side with a waste gas input and a first coupling opening, which is in fluidic connection with an inlet opening of the first steam generator, as well as with a second coupling opening, which is in fluidic connection with an inlet opening of the second steam generator;
• an outlet coupling element on a system outlet side, with a waste gas output and a first coupling opening, which is in fluidic connection with an outlet opening of the first steam generator, as well as with a second coupling opening, which is in fluidic connection with an outlet opening of the second steam generator.

A motor vehicle internal combustion engine waste heat recovery device comprising:

• a waste heat recovery circuit in which a working medium circulates;
• a steam generator comprising a heat exchanger, a heat exchanger channel in which the heat exchanger is arranged, a bypass channel for bypassing the heat exchanger channel, a heating fluid flowing through the heat exchanger channel and the bypass channel during the operation of the steam generator and the working medium to be evaporated flows through the heat exchanger during the operation of the steam generator, wherein the heat exchanger channel envelops the bypass channel, the steam generator system being arranged in the waste heat recovery circuit for evaporating the working medium;
• an expansion engine arranged in the waste heat recovery circuit downstream of the steam generator for releasing the working medium;
• a condenser arranged in the waste heat recovery circuit downstream of the expansion engine for condensing the working medium;
• a delivery means arranged in the waste heat recovery circuit downstream of the condenser for driving the working medium in the waste heat recovery circuit, wherein the heat exchanger are fluidically bound in the waste heat recovery circuit, and wherein during operation of the waste heat recovery device, waste gas flows through the heat exchanger channel.