KR20110063935A - Energy saving ship with power generation system using orc - Google Patents

Abstract

PURPOSE: An energy saving ship equipped with a power generation system using temperature difference is provided to continuously drive a turbine and produce a large amount of electric power by repeating the vaporization and liquefaction of working fluid in an evaporator and a cooler. CONSTITUTION: An energy saving ship equipped with a power generation system using temperature difference comprises a heat engine(7) which is cooled by clean water, a cooler(8) which performs heat exchange between clean water and seawater, hot and cold clean water pipes(9,10) which connect the heat engine and the cooler and let hot and cold clean water flow, hot and cold seawater pipes which guide seawater drawn into or discharged from the cooler, and an ORC(Organic Rankine Cycle) which generates power by circulating working fluid through an evaporator, a turbine, a condenser, and a pump. The evaporator of the ORC performs heat exchange with the hot clean water pipe and the condenser with the cold clean water pipe.

Description

Energy Saving Ship with Power Generation Unit Using Temperature Difference {Energy Saving Ship with Power Generation System using ORC}

        The present invention relates to a technology for producing electric power by installing and operating an ORC device in a ship's heat engine cooler, and more particularly, an increased working fluid vaporized by heat of hot water introduced into a main engine, an auxiliary engine, and a boiler drain cooler. The present invention relates to a technology for generating electricity by rotating and generating a turbine at a pressure of and generating electric power, and repeating the process of liquefying a gaseous working fluid passing through the turbine with cold water and sending it back to the evaporator.

In general, a vessel converts thermal energy generated by burning fossil fuel in a main engine into rotational kinetic energy of a propeller shaft.

For example, a container ship of about 8,000 TEU class consumes 15 tons of fuel for propulsion at the main engine, and the heat generated by burning this large amount of fuel oil is significant. Some of this heat energy is converted into kinetic energy and used for the propulsion of ships, but heat energy that is not converted to kinetic energy should be operated outside the engine by cooling system using fresh water and sea water to prevent overheating of the main engine. Therefore, since the cooling system is always operated while sailing, a large amount of hot water and cold water circulate inside the hull in the case of medium or large ships.

Looking at the circulation process of the cooling system of the ship main pipe (1), as shown in Figure 1, using the cold water to absorb the heat of the heat engine, the temperature is increased by absorbing the heat of the warm and clean water in the heat exchanger (2) in the cooler The temperature is lowered through heat exchange with cold sea water. At this time, the warm seawater, which is heated by absorbing heat from the warm and clean water, is discharged to the ocean. The cold and clean water, which loses heat and is cooled, is transported back to the main engine through a pump and used for cooling.

In addition to the main engines used for the propulsion of ships, it is used to produce electric power supplied to various electric devices used in ships, such as various pumps in the hull, various facilities inside the residential area, and cranes used for loading and unloading cargo. In the case of facilities such as an auxiliary engine and a generator, a cooling system having the same circulation process as that of the main engine as shown in FIG. 1 is operated in order to prevent overheating of the mechanical device due to the use of a large amount of fuel oil.

However, a large amount of hot water and cold water used in such a circulation process is always supplied, and despite the large capacity, it is not reused but is discharged to the sea.

In recent years, there is a need for technology to reduce GHG emissions by saving energy and reducing the use of fossil fuels by making full use of the energy resources available in ships in the situation where global GHG regulations are not free. .

The present invention is repeatedly vaporized and liquefied by using a working fluid that is easily vaporized at the same temperature as the hot water of the main engine, auxiliary engine and boiler drain cooler and liquefied easily at the same temperature as the cold water of the room temperature or cooler. By repeating the process, the Organic Rankine Cycle (ORC), which generates power, is installed in the cooling system of various heat engines of the ship as shown in Fig. 3, thereby saving fuel oil and reducing greenhouse gas emissions by recycling energy sources discharged at sea. Its purpose is to provide a way to do this.

The present invention is connected to the hot water pipes and cold water pipes of the cooler operating to prevent overheating of the heat engine of the vessel as shown in Figure 3 to supply hot water and cold water to the ORC, ORC evaporator absorbs heat from the hot water It is characterized by consisting of a device for generating electricity by vaporizing the working fluid to drive the turbine, and a device for condensing and liquefying the working fluid in the gas state using the cold water supplied by the cooler after driving the turbine.

The present invention is a method of continuously producing a turbine by generating a power by repeating the vaporization and liquefaction of the working fluid in the evaporator and the cooler by using the hot and cold water of the cooler to prevent overheating of the vessel heat engine, the existing ship It is a feature that can utilize resources that are discharged from the system. Especially in the case of medium and large ships, the flow rate of hot and cold water circulated for the operation of the cooling system is considerable, and the cooling system must be operated at all times. The gas emission reduction effect can also be expected.

The present invention will now be described in detail with reference to the accompanying drawings.

2 is a conceptual diagram of an ORC that generates electric power by using hot water and cold water. When the working fluid is vaporized by absorbing heat from hot water introduced into the evaporator 3 of the ORC, the pressure in the cycle increases rapidly. At this time, due to the increased pressure, the turbine 4 installed inside the cycle rotates, thereby generating power by converting the kinetic energy into electrical energy. The gas passing through the turbine passes through the condenser 5 and loses heat through heat exchange with cold water and is converted into a liquid. At this time, the liquefied working fluid is recycled to the evaporator using the pump 6 to continuously produce electric power.

An ORC as shown in FIG. 2 is installed in a cooling system of various heat engines 7 such as a main engine, an auxiliary engine, and a boiler as in FIG. 3 to produce electric power. The hot water used for evaporation of the working fluid in the evaporator 3 is provided from the warm and clean water pipe 9 which absorbs heat from the heat engine and flows into the cooler 8 and the cold water used for the liquefaction of the working fluid in the condenser is the heat engine from the cooler. It is provided from the cold and clean water pipe 10 is supplied to.

1 is a conceptual diagram showing the flow of the cooling system and hot water and cold water of the main engine and auxiliary engine of the ship.

Figure 2 is a conceptual diagram of the Organic Rankine Cycle (ORC) apparatus used in the present invention

3 is a conceptual diagram showing the concept of a system incorporating an ORC device in a cooling system of a ship's heat engine according to the present invention.

Claims (2)

Heat engine cooling with fresh water, Fresh water and sea water flow, the cooler to heat exchange with each other, Warm water pipes connecting the heat engine and the cooler and flowing warm fresh water discharged from the heat engine, Cold and clean water pipes connecting the heat engine and the cooler and flowing cold and clean water discharged from the cooler, Cold seawater piping to guide seawater flowing from the outside of the hull to the cooler, Hot sea water pipe that discharges fresh water from the cooler An organic Rankine cycle device that generates power as the working fluid circulates through the evaporator, turbine, condenser and pump; Evaporator of the organic Rankine cycle device heat exchange with the warm water pipe, the condenser is configured to heat exchange with the cold water pipe, energy-saving vessel equipped with a generator using a temperature difference The method according to claim 1, The heat engine is an energy-saving vessel equipped with a generator using a temperature difference, characterized in that any one of the main engine, auxiliary engine and boiler of the vessel.

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