Heat engine and method for operating a heat engine

Heat engine, comprising:

• a combustion apparatus, which comprises a combustion chamber;
• a supply air feed for supplying supply air to the combustion chamber;
• a fuel feed for supplying fuel to the combustion chamber;
• an exhaust gas discharge for removing exhaust gas from the combustion chamber;
• a heat exchanger, by which the exhaust gas discharge and the supply air feed are thermally coupled to each other;
• a bypass guide, by which at least one of a part of the supply air or the exhaust gas is guidable past the heat exchanger, while avoiding a heat transfer from the exhaust gas to the supply air;
• and
• a control apparatus, by which at least one of a mass stream or a volumetric stream of at least one of the part of the supply air or the exhaust gas guided past the heat exchanger by the bypass guide is controllable in such a way that at least one of a thermal power or a mechanical power of the heat engine is approximately constant.

Use of a heat engine comprising:

• a combustion apparatus, which comprises a combustion chamber;
• a supply air feed for supplying supply air to the combustion chamber;
• a fuel feed for supplying fuel to the combustion chamber;
• an exhaust gas discharge for removing exhaust gas from the combustion chamber;
• a heat exchanger, by which the exhaust gas discharge and the supply air feed are thermally coupled to each other;
• a bypass guide, by which at least one of a part of the supply air or the exhaust gas is guidable past the heat exchanger, while avoiding a heat transfer from the exhaust gas to the supply air;
• and
• a control apparatus, by which at least one of a mass stream or a volumetric stream of at least one of the part of the supply air or the exhaust gas guided past the heat exchanger by the bypass guide is controllable in such a way that at least one of a thermal power or a mechanical power of the heat engine is approximately constant;
• the heat engine for performing a method as follows, the method comprising:
• supplying gas containing combustible constituents as supply air to a combustion chamber of a combustion apparatus of the heat engine;
• supplying fuel to the combustion chamber;
• removing exhaust gas from the combustion chamber and supplying the exhaust gas to a heat exchanger of the heat engine;
• transferring heat from the exhaust gas to at least a part of the supply air by the heat exchanger;
• and
• guiding a part of at least one of the supply air or a part of the exhaust gas past the heat exchanger by a bypass guide, wherein at least one of a mass stream or volumetric stream of at least one of the part of the supply air or the exhaust gas guided past the heat exchanger is controlled so that at least one of a thermal power or a mechanical power of the heat engine is approximately constant over time.