Double-loop thermo-acoustic system driven by tail gas waste heat of ship main engine

Abstract

The invention discloses a double-loop thermo-acoustic system driven by tail gas waste heat of a ship main engine. The double-loop thermo-acoustic system comprises a waste heat boiler, two thermo-acoustic engines, a thermo-acoustic refrigerator and a power generator, wherein tail gas waste heat of the ship main engine is introduced into a waste heat boiler; an overheated steam outlet of the waste heat boiler communicates with the first thermo-acoustic engine, the first thermo-acoustic engine is connected to the power generator, and the power generator is connected to load; a saturated steam outlet of the waste heat boiler communicates with the second thermo-acoustic engine which is connected to the thermo-acoustic refrigerator; the thermo-acoustic refrigerator is connected to load; and coolers of the two thermo-acoustic engines are connected to a condenser. The double-loop thermo-acoustic system efficiently utilizes ship waste gas waste heat to perform gradient utilization of waste heat, greatly reduces energy consumption and increases an energy utilization rate; and the thermo-acoustic engines and the thermo-acoustic refrigerator are free of motion parts, so that the abrasion and vibration problem caused by the motion parts is reduced, system operation stability is guaranteed, and the application prospect is very good.

Description

technical field [0001] The invention relates to the technical fields of thermoacoustic technology and waste heat utilization, in particular to a dual-loop thermoacoustic system driven by waste heat from exhaust gas of a main engine of a ship, which realizes cascade utilization of temperature. Background technique [0002] Nowadays, the energy issue has attracted the attention of the world, and non-renewable energy sources such as petroleum are decreasing day by day, so we need to take effective measures to reduce energy consumption. The marine diesel engine has the advantages of good economy and reliability, so it is widely used as the power device of the ship. The chemical energy consumed by marine diesel engines accounts for 70%-90% of the total input energy, accounting for most of the energy used by the entire ship. During the operation phase of the ship, fuel combustion produces a large amount of heat, of which 30%-45% of the heat is in the form of exhaust gas Discharge...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a dual-loop thermoacoustic system driven by waste heat from the tail gas of the main engine of a ship, in order to overcome the problems and defects in the prior art that the waste heat utilization rate of the single power generation and refrigeration system is not high, and the vibration of the thermoacoustic engine is difficult. A waste heat boiler is added to the system. The waste heat boiler uses the exhaust heat of the ship's main engine to generate superheated steam and saturated steam. The superheated steam and saturated steam provide a more stable heat source for the thermoacoustic engine, which solves the problem of vibration of the thermoacoustic engine caused by flue gas temperature instability. Difficult problem, and the system of the present invention is a double-loop system, which has two thermoacoustic engines, one loop for refrigeration, and the second loop for power generation, so that the energy can be utilized in steps and the utilization rate of waste heat can be improved

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