A speed-based control method for waste heat comprehensive recovery system of marine low-speed diesel engine

A diesel engine and rotational speed technology, which is applied in mechanical equipment, steam engine devices, combustion engines, etc., to achieve the effect of improving utilization efficiency and simple implementation.

Active Publication Date: 2018-08-31
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is aimed at the exhaust waste heat utilization of marine diesel generator sets, and does not involve the waste heat utilization and control method of the main diesel engine of the ship

Method used

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  • A speed-based control method for waste heat comprehensive recovery system of marine low-speed diesel engine
  • A speed-based control method for waste heat comprehensive recovery system of marine low-speed diesel engine
  • A speed-based control method for waste heat comprehensive recovery system of marine low-speed diesel engine

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Experimental program
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Effect test

Embodiment approach

[0035] The first section is the start-up and no-load section of the diesel engine. When the speed of the diesel engine is lower than the set value n1 after starting, or the speed is lower than the set value n8 after deceleration discharge;

[0036] The second section is the boiler working section. When the speed of the diesel engine exceeds the first set value n1 during the speed-up stage, the control device of the waste heat boiler power generation unit closes the bypass flue to start the waste heat boiler. At the same time, the boiler water circulation system works, and the diesel engine discharges The gas passes through the waste heat boiler to heat the furnace water, and the exhaust gas flows through the heat exchangers of each section of the waste heat boiler in turn, and then is discharged into the atmosphere from the outlet flue of the waste heat boiler; The boiler power generation unit control device shuts down the waste heat boiler and opens the bypass flue.

[0037]...

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Abstract

The invention aims at providing a ship low-speed diesel engine waste heat comprehensive recycling system control method based on the rotation speed. An exhaust pipe of a ship low-speed diesel engine is connected with a power turbine and a turbine of a turbocharger. The turbine of the turbocharger is connected with a waste heat boiler, and the waste heat boiler is connected with a steam turbine and an organic working medium steam turbine. The power turbine, the organic working medium steam turbine and the steam turbine are connected with a power generator. The turbocharger is further connected with a bypass channel. A startup or shutdown control signal is output to a waste heat boiler control device, an organic working medium power generation unit control device, a steam turbine power generation unit control device and a power turbine power generation unit control device according to the rotation speed of the ship low-speed diesel engine so that control over startup and shutdown of the corresponding devices can be achieved. By adoption of the section control mode, different utilization measures can be adopted according to exhaust gas parameters generated when the diesel engine runs at different rotation speed sections, and the waste heat recycling efficiency is improved.

Description

technical field [0001] The invention relates to a method for controlling the waste heat energy of a diesel engine, in particular to a method for controlling the waste heat energy of a low-speed diesel engine of a fixed-pitch propeller ship. Background technique [0002] The energy issue has become a top priority issue in economic development. Ships are means of transportation with huge energy consumption. On the one hand, high energy consumption increases the operating cost of ships, and on the other hand, it also brings serious environmental problems to the operation of ships. How to effectively reduce ship energy consumption is a realistic and important issue. The International Maritime Organization (IMO) has adopted EEDI (Energy Efficiency Design Index, New Ship Energy Efficiency Design Index) as an indicator for evaluating the energy consumption of ship design. The low energy utilization efficiency of ships will not only face high fuel costs, but also face Additional f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K23/10F01K23/18F01K25/08F02B41/10F02B37/18
CPCF01K23/10F01K23/101F01K23/18F01K25/08F02B37/18F02B41/10Y02T10/12
Inventor 李文辉张文平刘长铖袁志国张新玉王忠巍张子鉴夏文
Owner HARBIN ENG UNIV
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