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High pressure liquid power generation organic Rankine cycle power generation system

A high-pressure liquid, power generation system technology, applied to machines/engines, mechanical equipment, engine components, etc., can solve problems such as waste and energy consumption, and achieve the effects of long service life, stable operation, and small footprint

Active Publication Date: 2016-05-25
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a high-pressure liquid acting organic Rankine cycle power generation system, which does not require a working fluid pump to raise the working fluid pressure when the system is running stably like the existing system , consumes the energy outside the system; the working medium used in it is in the form of liquid to do work, and the work process and the required conditions are relatively simple, which is convenient for equipment maintenance, reduces maintenance costs and reduces failure problems; effectively solves the problem of medium and low temperature waste heat waste problem

Method used

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  • High pressure liquid power generation organic Rankine cycle power generation system

Examples

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Effect test

Embodiment 1

[0030] The organic working medium adopts R245fa.

[0031] In this example, the ambient temperature is 298.15K, the ambient pressure is 0.1MPa,

[0032]When starting the system, the first valve 1 is opened and the second valve 2 is closed to prevent the organic working medium from the working medium pump 8 from flowing backward in the pipeline. The working medium pump 8 supplies the high-pressure liquid organic working medium to the evaporator 4. The organic working medium undergoes heat exchange with the waste heat or the intermediate heat transfer medium in the evaporator and evaporates into a gaseous state. R245fa evaporates in the evaporator at equal pressure. 2.83~3.39MPa, the outlet temperature and pressure are controlled at 413.15~423.15K, 2.83~3.39MPa respectively; the gaseous organic working medium from the evaporator 4 enters the two-phase booster device as the working fluid to inject the liquid organic working medium under low pressure. The temperature of the medium...

Embodiment 2

[0034] The equipment and environmental conditions are the same as in Example 1, and R141b is used as the organic working fluid of the system in addition. The inlet pressure of the evaporator is 2.95-3.15MPa, R141b is evaporated in the evaporator under constant pressure, and the outlet temperature and pressure are 455.15-463.15K, 2.95-3.15MPa respectively; the gaseous organic working fluid from the evaporator enters the two-phase escalator as the working fluid. The temperature of liquid organic working fluid under low pressure injection in the pressure device is 323.15-333.15K, the pressure is 0.2-0.3MPa, and the liquid-gas mass flow ratio is 12. The obtained system □ efficiency is 26.4%-27.2%, and the system thermal efficiency is 9.17%-9.59%.

[0035] The system of the invention is easy to start, the two-phase booster operates stably, and the maintenance is simple, and there is basically no need to input extra energy to the system except waste heat.

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Abstract

The invention discloses a high-pressure liquid work applying type organic Rankine cycle power generating system, which comprises two loops, wherein one loop is formed by sequentially connecting a gas-liquid two-phase pressure boosting device, a condenser and a hydraulic turbine through pipelines, the output end of the hydraulic turbine is connected with a power generator, the other loop is formed by connecting the gas-liquid two-phase pressure boosting device and an evaporator through pipelines, a second valve is arranged on the pipeline from an outlet of the gas-liquid two-phase pressure boosting device to the evaporator, the two ends of the second valve are connected in parallel with a branch path, the branch path is sequentially connected in series with a first valve, a working medium pump and a check valve, gas-state organic working media flowing out from the evaporator are working fluid, and liquid organic working media flowoing from the hydraulic turbine to the gas-liquid two-phase pressure boosting device are ejection fluid. The high-pressure liquid work applying type organic Rankine cycle power generating system has the advantages that the hydraulic turbine is pushed to apply work by the working media in a high-pressure liquid state form, in addition, the driving cycle operation is realized through the two-phase pressure boosting device after the stable operation of the system, after the operation starting, additional energy does not need to be input into the system except afterheat, the energy investment can be reduced, and the output energy can be increased.

Description

technical field [0001] The invention relates to the field of medium and low temperature waste heat organic Rankine cycle power generation, in particular to an organic Rankine cycle power generation system which uses a hydraulic turbine as an energy conversion component and a two-phase booster device provides system cycle power. Background technique [0002] Waste heat energy occupies a large proportion in the energy structure, but it has not been effectively utilized. In today's severe situation of active forms, research and development of waste heat energy utilization technology is very important for energy saving and improving energy utilization. significance. In the medium and low temperature organic Rankine cycle power generation system mentioned in the existing literature, the main components are evaporator, expander (steam turbine, scroll expander and screw expander), condenser and working medium pump. The organic working medium undergoes four processes of isobaric he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03B13/00
Inventor 李刚黄惠兰谭金富陈强
Owner GUANGXI UNIV