ORC (organic Rankine cycle) system for marine main engine waste heat generation

A ship main engine and thermal power generation technology, which is applied to machines, machines/engines, and mechanical equipment that use waste heat, can solve problems such as energy loss, system complexity, performance matching, and system control difficulties, and achieve high-temperature cracking and modification of refrigerants. small effect

Active Publication Date: 2014-08-13
ZHEJIANG YINLUN MACHINERY
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Problems solved by technology

The system of this invention is relatively complicated. The jacket water and exhaust gas heat the preheater and evaporator respectively, which is

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  • ORC (organic Rankine cycle) system for marine main engine waste heat generation

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Embodiment Construction

[0015] With reference to the accompanying drawings, an ORC system for waste heat power generation of a main engine of a ship according to the present invention includes an engine exhaust circuit, an engine jacket water circuit, a refrigerant circuit and an external cooling water circuit.

[0016] In the engine exhaust circuit, the engine exhaust passes through the flue gas heat exchanger 8 to dissipate heat before being directly discharged into the environment, and then transfers the heat to the cylinder jacket water and the refrigerant in turn, thereby realizing the recovery of exhaust heat. The flue gas heat exchanger in this system is a two-stage flue gas heat exchanger. The first stage is the heat exchange between the engine flue gas and the cylinder jacket water of the engine, and it is arranged downstream; the second stage is the heat exchange between the engine flue gas and the ORC system refrigerant. Heat exchange is also arranged along the flow. In actual operation, i...

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Abstract

The invention discloses an ORC (organic Rankine cycle) system for marine main engine waste heat generation, which comprises an engine tail gas loop, an engine liner water loop, a coolant loop and an external cooling water loop. The ORC system, which is a power system based on the organic Rankine cycle, absorbs the waste heat of engine liner water and engine tail gas. After liner water is adopted to absorb the heat of engine tail gas in the system, the coolant of the ORC system is then heated; meanwhile, the heated coolant is utilized to absorb part of residual heat after heat exchange between the engine tail gas and the liner water. The system can be utilized to effectively solve the problem that the low temperature of marine main engine liner water results in the over-low evaporating pressure and low system efficiency of the ORC system. Meanwhile, because the system utilizes the scheme that tail gas and liner water jointly absorb heat, the problem of coolant pyrolysis caused by direct heat exchange between organic coolant and high-temperature waste heat is solved. While diesel engine waste heat is recovered by the system to the max, the alteration of an existing diesel engine system is little.

Description

technical field [0001] The invention relates to an ORC-based diesel engine waste heat recovery power generation system, in particular to an ORC system suitable for ship main engine waste heat power generation. That is to say, it is a system device based on organic Rankine cycle engine waste heat recovery and power generation. It uses refrigerant (such as R245fa) to absorb heat from engine exhaust and cylinder liner water, and through the four stages of Rankine cycle, external power generation is performed to realize the waste heat of the engine. Recycle. Background technique [0002] With the increasingly severe energy shortage, the energy saving of engines has attracted people's attention. Using the ORC system to recover the waste heat of the engine is not only easy to implement but also has high heat recovery efficiency. The recyclable heat sources of the engine mainly include the heat of the cylinder jacket water and the heat of high-temperature exhaust gas discharged t...

Claims

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Application Information

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IPC IPC(8): F01K25/08F01N5/02F25B27/02
CPCY02T10/16Y02A30/274Y02P80/15Y02T10/12
Inventor 董军启王建长王斌陈能舜
Owner ZHEJIANG YINLUN MACHINERY
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