Waste heat power generation system of marine diesel engine based on organic Rankine cycle

A marine diesel engine and Rankine cycle technology, applied in the direction of machine/engine, steam generation method using heat carrier, mechanical equipment, etc. The effect of eliminating possibility and high utilization rate

Inactive Publication Date: 2012-08-08
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) On large diesel engine merchant ships with relatively high power and over 10,000 tons, the use of waste gas boilers instead of fuel-fired auxiliary boilers to generate steam for domestic miscellaneous purposes and fuel heating, etc., cannot fully utilize the exhaust waste heat of the main engine, because with the As the engine power increases, the exhaust heat also increases
[0004] The application of the waste heat power generation system for marine diesel engines based on the Rankine cycle in actual ships has the following important restrictive factors: (1) The waste heat power generation system for marine diesel engines based on the Rankine cycle is easy to form wet steam in the steam turbine, and the high-speed small The impact of water droplets on the blades of the steam turbine will cause corrosion damage and shor

Method used

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  • Waste heat power generation system of marine diesel engine based on organic Rankine cycle
  • Waste heat power generation system of marine diesel engine based on organic Rankine cycle
  • Waste heat power generation system of marine diesel engine based on organic Rankine cycle

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Experimental program
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Effect test

Embodiment 1

[0021] like figure 1 As shown, the system includes: exhaust gas boiler 1, steam turbine 2, speed reducer 3, generator 4, condenser 5, booster pump 6, heat exchanger 7 and evaporator 8 installed in the exhaust gas boiler. Among them, the booster pump 6 is used to compress the supercooled organic working fluid in the condenser 5 into a high-pressure supercooled liquid and then pump it into the heat exchanger 7; In the heat exchanger 7, the subcooled organic working medium is heated by the high-pressure superheated organic working medium gas from the evaporator 8; the evaporator 8 is used to generate high-pressure and low-superheated organic working medium steam; The superheated organic working medium steam expands to do work; the steam turbine 2 drives the alternator 4 through the reducer 3; the alternator 4 is used to generate electric energy suitable for use on board; the condenser 5 is used to cool the organic working medium steam to a low subcooling degree liquid.

[0022]...

Embodiment 2

[0031] like figure 2 As shown, the system is a marine diesel waste heat power generation system based on organic Rankine cycle that can recover other waste heat at the same time. The difference between this embodiment and Embodiment 1 is: the high-pressure subcooled organic working fluid in the heat exchanger 7 is heated by the heating pipe 9 connected to the external heat source, and the external heat source can be other waste heat sources on board, such as the cooling water of the main engine cylinder jacket, High temperature pressurized air, etc.

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Abstract

The invention relates to a waste heat recovery system of a marine diesel engine, specifically to a waste heat power generation system of a marine diesel engine based on the organic Rankine cycle, comprising a waste gas boiler which is installed on a ship and takes the waste heat of the marine diesel engine as a heat source. The waste gas boiler is equipped with an evaporator which takes hot water in the boiler as a heat source, wherein the evaporator can heat an organic working medium circulating through the evaporator and generate steam. A medium steam outlet of the evaporator passes through a steam turbine and connects to a booster pump inlet through a cooling medium reflux inlet of the steam turbine, and a booster pump outlet is connected to a medium inlet of the evaporator. The steam turbine drives a generator to make electricity. The waste heat power generation system provided by the invention can improve the efficiency in utilizing the waste heat of marine diesel engines, having a compact structure and reliable operation.

Description

technical field [0001] The invention relates to a waste heat recovery system of a marine diesel engine, in particular to a waste heat power generation system of a marine diesel engine based on an organic Rankine cycle. Background technique [0002] Ships are the main means of transportation for the economy and trade of various countries, and play an irreplaceable role in the development of the global economy. According to statistics, more than 90% of the world's import and export commodities are transported by ships. The main propulsion power of ships includes medium and low speed diesel engines, gas turbines, and nuclear power. Due to the advantages of good economy, high reliability, convenient maintenance, long service life, wide power range, good maneuverability and low-cost low-quality fuel, marine medium and low-speed diesel engines are widely used in commercial transport ships. At present, only 45% to 55% of the heat energy released by fuel combustion is converted in...

Claims

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Application Information

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IPC IPC(8): F02G5/02F01D15/10F22B1/18
CPCY02T10/166Y02T10/12
Inventor 马哲树杨东
Owner JIANGSU UNIV OF SCI & TECH
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