Marine main engine cylinder sleeve water and waste gas waste heat recovery power generation system and control method

By optimizing the waste heat recovery and power generation system of the ship's main engine cylinder liner water and exhaust gas, adopting a parallel structure and partial pressure evaporator, and combining it with a supercapacitor lithium battery energy storage system, the problems of heat source mismatch and power fluctuation in the existing technology have been solved, and efficient waste heat recovery and power conversion have been achieved.

CN122106712APending Publication Date: 2026-05-29NANTONG COSCO KHI SHIP ENG
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Patent Information

Application Number
CN202610285502.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-10
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing marine organic Rankine cycle waste heat recovery power generation technology fails to effectively couple and utilize cylinder liner water and steam waste heat, resulting in problems such as output power fluctuations and heat source mismatch.

Method used

A waste heat recovery and power generation system for marine main engine cylinder liner water and exhaust gas was designed, including a cylinder liner water heater, a water generator, an organic Rankine cycle system, and an energy storage system. The system optimizes heat source utilization through a parallel structure and a partial pressure evaporator, and uses a supercapacitor-lithium battery hybrid energy storage system to stabilize power output.

Benefits of technology

It has achieved stable recovery and cascade utilization of cylinder liner water and waste heat from exhaust gas, improved power conversion efficiency, reduced ship fuel consumption, and enhanced greenness and economic benefits.

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Abstract

The invention discloses a marine main engine cylinder sleeve water and waste gas waste heat recovery power generation system which comprises a marine main engine, a waste gas compound boiler, an energy storage system, a cylinder sleeve water heater, a fresh water generator, a degassing chamber, an expansion water tank, a cylinder sleeve cooling water pump, a temperature control valve, an organic Rankine cycle system and a waste gas supercharger. According to the system, waste heat in the marine main engine cylinder sleeve water can be effectively recycled, redundant waste heat can be recycled through the waste gas boiler and steam, gradient utilization is conducted on the waste heat through the evaporators with different pressures, and organic Rankine cycle is efficiently utilized to convert internal energy of the waste heat into electric energy.
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