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Kalina coupling power generation system and process based on solar amino thermochemical energy storage

A technology of solar amino and power generation system, applied in the field of new energy and Karina cycle power generation, can solve the problems of low endothermic temperature, increase of irreversible loss, increase of temperature difference, etc., to improve cycle efficiency, reduce irreversible heat loss, improve Effect of Turbine Back Pressure

Pending Publication Date: 2021-06-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In waste heat power generation, the Rankine cycle system with water as the working fluid is its basic form. Due to the isothermal evaporation characteristics of water, the average heat absorption temperature of the cycle is low, the temperature difference increases, and the irreversible loss increases.

Method used

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  • Kalina coupling power generation system and process based on solar amino thermochemical energy storage

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The direct solar radiation intensity is taken as 1kW / m 2 , through the amino thermochemical energy storage system, the reaction product at about 550°C is generated in the adiabatic reactor 6 and enters the third heat exchanger 7 for heat exchange. Heater 15 heats up and enters the third heat exchanger 7 to be heated and overheated to produce superheated ammonia water vapor at 510°C and pressure of 8.3MPa, which enters turbine 9 to perform work, and turbine 9 discharges exhaust gas at 0.059MPa and 224°C. The exhaust gas is cooled by the fourth heat exchanger 10, then diluted to a 45% basic solution by the 35% lean ammonia solution from the throttle valve 14, enters the fifth heat exchanger 11, and is condensed by cooling water at a temperature of 16°C The saturated liquid coming out of the fifth heat exchanger 11 is pressurized by the condensation pump 12, and part of it is heated by the sixth heat exchanger 13 and the fourth heat exchanger 10, and then enters the separa...

Embodiment 2

[0023] The direct solar radiation intensity is taken as 1kW / m 2 , through the amino thermochemical energy storage system, the reaction product at about 520°C in the adiabatic reactor 6 enters the third heat exchanger 7 for heat exchange, and the ammonia solution with a concentration of about 80% is pressurized through the feed pump 17, and the seventh heat exchanger 15 After heating up, it enters the third heat exchanger 7 to be heated and overheated to produce superheated ammonia water vapor with a temperature of 415°C and a pressure of 8.3MPa, which enters the turbine 9 to do work, and the turbine 9 discharges exhaust gas at 0.059MPa and 203°C. The exhaust gas is cooled by the fourth heat exchanger 10, then diluted to a 52% basic solution by the 40% lean ammonia solution from the throttle valve 14, and then enters the fifth heat exchanger 11 and is cooled by cooling water at a temperature of 16°C. Condensation; the saturated liquid from the fifth heat exchanger 11 is pressuriz...

Embodiment 3

[0025] The direct solar radiation intensity is taken as 1kW / m 2 , through the amino thermochemical energy storage system, the reaction product at about 575°C in the adiabatic reactor 6 enters the third heat exchanger 7 for heat exchange, and the ammonia solution with a concentration of about 50% is pressurized through the feed pump 17, and the seventh heat exchanger 15 After heating up, it enters the third heat exchanger 7 to be heated and overheated to produce superheated ammonia water vapor with a temperature of 527°C and a pressure of 8.3MPa, which enters the turbine 9 to do work, and the discharge pressure of the turbine 9 is 0.059MPa and 237°C The exhaust gas is cooled by the fourth heat exchanger 10, and then diluted to a 31% basic solution by the 22% lean ammonia solution from the throttle valve 14, and enters the fifth heat exchanger 11 to be heated at a temperature of 16°C. The cooling water condenses; the saturated liquid from the fifth heat exchanger 11 is pressuriz...

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Abstract

The invention discloses a Kalina coupled power generation system and process based on solar amino thermochemical energy storage, and belongs to the technical field of new energy and Kalina cycle power generation. The Kalina coupled power generation system comprises an amino thermochemical energy storage system and a Kalina cycle system, an outlet of a separator is correspondingly connected with hot end inlets of a sixth heat exchanger and a seventh heat exchanger, and the seventh heat exchanger, an eighth heat exchanger and a water feeding pump are sequentially connected to form a loop; the sixth heat exchanger, a throttle valve, a fifth heat exchanger and a condensate pump are sequentially connected to form a loop; an inlet of the separator is connected with the sixth heat exchanger through a fourth heat exchanger; and an inlet of a turbine and a cold end outlet of the seventh heat exchanger are correspondingly connected with the amino thermochemical energy storage system, an outlet of the turbine is connected with a hot end inlet of the fifth heat exchanger through the fourth heat exchanger, and an outlet pipeline of the throttle valve is connected with the fourth pipeline. According to the Kalina coupled power generation system, two cycle systems are coupled, so that the effects of avoiding byproducts and improving the waste heat utilization efficiency are achieved.

Description

technical field [0001] The invention belongs to the technical field of new energy and Karina cycle power generation, and specifically relates to a Karina coupled power generation system and process based on solar amino thermochemical energy storage. Background technique [0002] As the largest renewable energy source, solar energy can reduce human dependence on fossil energy and carbon emissions. Energy storage is considered to be the most important tool to solve the instability of new energy power generation, and can realize peak shifting and valley filling. Solar thermochemical energy storage (TCES) can not only store and release energy through breaking and recombining chemical bonds, but also has the function of a chemical heat pump to convert relatively low-grade solar energy into higher-grade thermal energy. Therefore, solar TCES systems have the potential to be coupled with HTE, advanced high-efficiency power generation cycles (such as the Karina cycle) and improve eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K13/00F28D20/00
CPCF01K13/00F28D20/0034Y02E60/14Y02E70/30
Inventor 陈晨赵建国夏起冯帅明孔明民钱挺杜伟何兴
Owner ZHEJIANG UNIV OF TECH
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