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A Cogeneration System Based on Organic Rankine Cycle and Supercritical Carbon Dioxide Cycle

A technology based on Rankine cycle and carbon dioxide, applied in heating systems, hot water central heating systems, mechanical equipment, etc., can solve problems such as large environmental temperature differences, achieve high safety, high cycle efficiency, and improve power generation efficiency

Active Publication Date: 2021-08-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a combined supply system based on organic Rankine cycle and supercritical carbon dioxide cycle to solve the problem of large environmental temperature difference between winter and summer in severe cold areas, and propose a new type of combined supply system suitable for both winter and summer. Meet the needs of both heating and power generation in winter and power supply in summer

Method used

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  • A Cogeneration System Based on Organic Rankine Cycle and Supercritical Carbon Dioxide Cycle
  • A Cogeneration System Based on Organic Rankine Cycle and Supercritical Carbon Dioxide Cycle

Examples

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Embodiment 1

[0033] Its connection schematic diagram of the joint supply system of the present embodiment, as figure 1 shown.

[0034] When operating in winter, the organic Rankine cycle and the supercritical carbon dioxide cycle are coupled through the ORC working medium-CO2 heat exchanger 3, it is necessary to close the valve-1 12, open the valve-2 13, close the valve-4 16, open the valve- 3 15; close the flow regulating valve 14; the specific operation is as follows:

[0035] In the organic Rankine cycle, the ORC condenser 1 absorbs the cold energy of the air to condense the working medium into a low-temperature liquid working medium, and the low-temperature liquid working medium enters the working medium pump 2 for compression, and the ORC working medium at the outlet of the working medium pump 2 flows through the valve -2 13, flow into the ORC working fluid-CO2 heat exchanger 3 to absorb the cooling heat of CO2, and complete the phase transition. Doing work and driving the first gen...

Embodiment 2

[0042] Its connection schematic diagram of the joint supply system of the present embodiment, as figure 2 shown.

[0043] When operating in winter, the organic Rankine cycle and the supercritical carbon dioxide cycle are coupled through the ORC working medium-CO2 heat exchanger 3, it is necessary to close the valve-1 12, open the valve-2 13, close the valve-4 16, open the valve- 3 15; close the flow regulating valve 14; the specific operation is as follows:

[0044] In the organic Rankine cycle, the ORC condenser 1 absorbs the cold energy of the air to condense the working medium into a low-temperature liquid working medium, and the low-temperature liquid working medium enters the working medium pump 2 for compression, and the ORC working medium at the outlet of the working medium pump 2 enters the ORC return The heater 21 is preheated, and the preheated ORC working fluid flows through the valve-213, and the ORC working fluid at the outlet of the valve-213 flows into the low...

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Abstract

The invention discloses a joint supply system based on an organic Rankine cycle and a supercritical carbon dioxide cycle, which is characterized in that it includes an organic Rankine cycle system, a supercritical CO 2 Circulation system, two systems through ORC working fluid‑CO 2 The heat exchanger (3) is coupled to the cryogenic regenerator-2 (7). The invention can meet the requirements of power generation and heating in severe cold regions in winter and meet the requirements of power generation in summer under certain working conditions of cold and heat sources. The present invention uses ORC working fluid-CO 2 The heat exchanger and low temperature regenerator couple the organic Rankine cycle with the supercritical carbon dioxide cycle, making the structure more compact. The combined cycle of supercritical carbon dioxide and organic working medium in the invention has high efficiency and can significantly improve power generation efficiency. The system of the invention is simple, compact in structure, low in cost, flexible in operation, high in safety and energy-saving.

Description

technical field [0001] The invention relates to the technical field of cogeneration of heat and power, in particular to a cogeneration system based on an organic Rankine cycle and a supercritical carbon dioxide cycle. Background technique [0002] Energy is the lifeblood of the national economy and the material basis for human survival and development. In recent years, my country's energy development has made new achievements, the energy structure is undergoing a revolutionary transformation from "fossil energy-based to renewable energy-based", and the energy development mode is also undergoing a revolutionary transformation. In this context, the joint supply system has attracted more and more attention. [0003] Carbon dioxide (critical point: 31°C / 7.4MPa), as a natural working fluid, has stable chemical properties, high density, non-toxicity, low cost, and is easy to reach a supercritical state. It has been widely used in energy conversion in recent years. The power cycl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K7/32F01K17/02F01K25/10F24D3/02
CPCF01K7/32F01K17/02F01K25/103F24D3/02
Inventor 苏文余澳芳周乃君
Owner CENT SOUTH UNIV