System for efficiently recovering waste heat energy from internal combustion engine

Abstract

The invention discloses a system for efficiently recovering waste heat energy from an internal combustion engine. The system comprises an internal combustion engine cooling system and an exhaust Rankine cycle system, wherein the circulation loop of the internal combustion engine cooling system is provided with a three-way valve, and the three-way valve is used for coupling the internal combustion engine cooling system with the exhaust Rankine cycle system; the exhaust Rankine cycle system is internally provided with a pumping system, and the pumping system is used for controlling the flow rate of working substances entering the exhaust Rankine cycle system so as to provide control freedom degree for adjustment of main steam parameters within the range of the surface working condition; the pumping system is composed of a variable-frequency feed water pump, a solenoid valve and a bypass check valve, and the variable-frequency feed water pump and the solenoid valve are sequentially connected to an evaporator in the exhaust Rankine cycle system through the three-way valve; and a cooling fluid bypass loop is arranged between the three-way valve and the evaporator, and the bypass check valve is arranged on the cooling fluid bypass loop. The system provided by the invention has the advantages that by improving the system layout and the pumping system, the cooling fluid energy recycling efficiency and the exhaust energy recycling efficiency are improved at the same time within the range of the surface working condition of the internal combustion engine.

Description

technical field [0001] The invention relates to a waste heat energy recovery system of an internal combustion engine, in particular to an efficient waste heat energy recovery system of an internal combustion engine. Background technique [0002] According to the first law of thermodynamics, at present, only about one-third of the energy released by the combustion of internal combustion engine fuel is effectively used, and the rest of the energy is eventually dissipated into the atmosphere in the form of waste heat. Therefore, the waste heat energy of internal combustion engines can be effectively recovered and utilized. It is an important way to further improve the efficiency of internal combustion engines, reduce carbon dioxide emissions, and realize low-carbon internal combustion engines. [0003] Based on the recovery and utilization of waste heat energy of internal combustion engines to reduce oil consumption and reduce CO 2 With the recognition of the importance of emi...

AI Technical Summary

Problems solved by technology

[0010] However, the above-mentioned technologies have not effectively resolved the contradiction between system complexity and recovery efficiency of waste heat energy recovery technology, and there is no technical report on how the Rankine cycle system adapts to the working conditions of the internal combustion engine surface

Images