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Supercritical reheating regenerative Rankine cycle system

A technology of regenerative system and circulation system, which is used in steam engine installations, steam applications, machines/engines, etc., to achieve the effect of improving circulation thermal efficiency, increasing endothermic temperature, and efficient utilization

Pending Publication Date: 2022-01-07
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to break through the limitation of cycle efficiency by increasing the number of steam extraction stages
[0004] At present, the research on heat recovery is carried out in the subcritical region, and the supercritical region has not been explored, so it is still possible to further improve the average endothermic temperature and cycle thermal efficiency

Method used

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  • Supercritical reheating regenerative Rankine cycle system
  • Supercritical reheating regenerative Rankine cycle system
  • Supercritical reheating regenerative Rankine cycle system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] When Example 1 works,

[0039] In the supercritical heat recovery system 200, the low-pressure high-temperature steam entering from the low-pressure high-temperature steam inlet 2E of the heat recovery system is divided into the first heat recovery and the second heat recovery in proportion, and the second heat recovery enters the third high-temperature heat recovery The high-temperature steam inlet of the high-temperature regenerator 204 releases heat. After the first regenerating heat enters the high-temperature steam inlet of the first high-temperature regenerator 201 to release heat, it then enters the high-temperature steam inlet of the second high-temperature regenerator 202 to release heat, and then with the third high-temperature regenerator. The high-temperature steam from the high-temperature steam outlet of the regenerator 204 merges and enters the first compressor 203 to perform work;

[0040] The low-temperature working medium (low-temperature water) enteri...

Embodiment 2

[0047] When Example 2 works,

[0048] In the supercritical recuperation system 200:

[0049] The first regenerative heat entering from the low-pressure high-temperature steam inlet 2E of the regenerative system enters the high-temperature steam inlet of the first high-temperature regenerator 201, the high-temperature steam inlet of the fourth high-temperature regenerator 205, and the high-temperature steam of the second high-temperature heat exchanger 202 in sequence. After the steam inlet releases heat, it merges with the high-temperature steam at the high-temperature steam outlet of the third high-temperature regenerator 204 and enters the first compressor 203 to perform work;

[0050] The low-temperature working fluid (low-temperature water) entering from the low-temperature water inlet 2A of the recuperation system of the supercritical recuperation system 200 (the low-temperature water inlet of the second high-temperature regenerator 202 ) passes through the second high-te...

Embodiment 3

[0066] When working in Example 3,

[0067] In the supercritical recuperation system 200:

[0068] The low-pressure, high-temperature steam that enters from the low-pressure, high-temperature steam inlet 2E of the recuperation system is proportionally divided into two paths, the first regenerative and the second regenerative, wherein the second regenerative enters the high-temperature steam inlet of the third high-temperature regenerator 204 to release heat. After the first regenerative heat enters the high-temperature steam inlet of the first high-temperature regenerator 201 to release heat, it then enters the high-temperature steam inlet of the second high-temperature regenerator 202 to release heat, and then with the high-temperature steam at the high-temperature steam outlet of the third high-temperature regenerator 204 The steam merges and enters the first compressor 203 to do work;

[0069] The low-temperature working medium (low-temperature water) entering from the low-...

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Abstract

The invention discloses a supercritical reheating regenerative Rankine cycle system. The supercritical reheating regenerative Rankine cycle system comprises a Rankine cycle system, a supercritical regenerative system, a second-stage steam extraction regenerative system, a deoxidization system and a first-stage steam extraction regenerative system, wherein a regenerative system low-pressure high-temperature steam inlet in the supercritical regenerative system enters the supercritical regenerative system and then is divided into a first regenerative path and a second regenerative path; the first regenerative path is sequentially connected with inlets of a first high-temperature regenerator, a second high-temperature regenerator and a first compressor; the second regenerative path is sequentially connected with inlets of a third high-temperature regenerator and the first compressor; and steam of a high-temperature steam outlet of the third high-temperature regenerator and steam of a high-temperature steam outlet of the second high-temperature regenerator are converged. According to the supercritical reheating regenerative Rankine cycle system, the mass flow and the temperature of feed water entering a heater are high, the temperature of reheat steam entering a reheater is also high, and therefore the average heat absorption temperature is increased, and the cycle heat efficiency is further improved.

Description

technical field [0001] The invention belongs to the technical field of devices using a special steam system, in particular to a supercritical reheating and reheating Rankine cycle system. Background technique [0002] The Carnot cycle was proposed by French engineer Sadi Carnot in 1824 and is an ideal thermodynamic cycle. The thermal efficiency of the cycle depends only on the temperature of the high and low heat sources. For reversible cycles with multiple heat sources, the concepts of average endothermic temperature and average exothermic temperature are introduced in thermodynamics, and the thermal efficiencies of reversible cycles are qualitatively analyzed and compared. Each thermodynamic cycle improves the thermal efficiency of the cycle mainly by increasing and / or decreasing the average temperature to approach the Carnot cycle. At the same time, the Carnot cycle is not only the ultimate goal of cycle construction, but the absoluteness of Carnot efficiency also provi...

Claims

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Application Information

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IPC IPC(8): F01K23/04F01K17/02F01K13/00
CPCF01K23/04F01K17/025F01K13/00F01K13/006
Inventor 孙恩慧赵乘新李汇锋孙钺淇马文静张磊
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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