33results about How to "Improve the efficiency of waste heat recovery" patented technology

The invention discloses a two-stage expansion jet type waste heat recovery system of an internal combustion engine. According to the scheme, an ORC main circulating system is formed by sequentially connecting a condenser, a lower-pressure working medium pump, a high-pressure working medium pump, a high-temperature preheater, a high-temperature intercooler, a high-temperature flue gas heat exchanger, a first expansion machine, a jet pipe and a second expansion machine in series. A low-temperature intercooler, a low-temperature evaporator and a low-temperature flue gas heat exchanger are sequentially connected between the high-pressure working medium pump and the jet pipe and between the low-pressure working medium pump and the jet pipe, so that the ORC main circulating system is divided into a high-temperature stage branch and a low-temperature stage branch. Cooling water of a cylinder sleeve of the internal combustion engine is connected to the water side of the high-temperature preheater and the water side of the low-temperature evaporator and then returns to the cylinder sleeve. Intake air of the internal combustion engine enters the internal combustion engine by sequentially passing the air side of a gas compressor in a turbocharger, the air side of the high-temperature intercooler and the air side of the low-temperature intercooler. Exhaust gas of the internal combustion engine is connected to a turbine of the turbocharger, the high-temperature flue gas heat exchanger and a reheater in sequence. Waste heat of each part of the internal combustion engine waste heat recovery system can be utilized according to the quality ladder of the waste heat so that efficiency of the internal combustion engine waste heat recovery system can be improved obviously.