Coupled simulation of the combustion and fluid heating of a 300 MW supercritical CO2 boiler

Yang, Yu; Bai, Wengang; Wang, Yueming; Zhang, Yifan; Li, Hongzhi; Yao, Mingyu; Wang, Haijun

doi:10.1016/j.applthermaleng.2016.11.043

Cited by 76 publications

(18 citation statements)

References 23 publications

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“…Researchers are testing vertical, horizontal, circular, helical, and angled tubes configurations to improve supercritical heating and cooling systems . Impact of tube curvature on buoyancy, natural circulation, pressure drops, charge reduction and fins or foam inside tubes on performance of supercritical CO 2 heat transfer systems . The integration of gas coolers, ejectors, and boosters is under extensive research to increase performance of subcritical, transcritical, and supercritical CO 2 systems for residential, commercial, and industrial applications …”

Section: Sun Powered Co2 Systemsmentioning

confidence: 99%

“…[247][248][249][250][251][252][253][254][255] Impact of tube curvature on buoyancy, natural circulation, pressure drops, charge reduction and fins or foam inside tubes on performance of supercritical CO 2 heat transfer systems. [256][257][258][259][260] The integration of gas coolers, ejectors, and boosters is under extensive research to increase performance of subcritical, transcritical, and supercritical CO 2 systems for residential, commercial, and industrial applications. [261][262][263][264] Working with supercritical fluids is often dangerous, especially due to the high pressure of CO 2 .…”

Section: Supercritical Co 2 Systemsmentioning

confidence: 99%

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Review of carbon dioxide (CO ₂ ) based heating and cooling technologies: Past, present, and future outlook

2019

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Summary Refrigerants bearing high global warming potential (GWP) and ozone depletion potential (ODP) were outlawed or facing time‐beared permission under the Montreal (1987), Kyoto (1997) protocols, F‐Gas law (2015), Paris Accord (2016), and recent Kigali Amendment to Montreal Protocol (2019). In order to modify followed by the paradigm shift of existing heating and cooling systems, American Society of Heating, Refrigeration, and Air‐Conditioning Engineers (ASHRAE) envisaged natural and synthetic refrigerants (Synrefs) are under investigation globally. Carbon dioxide (CO2) is a popular natural refrigerant (Natref) replacing Synrefs used in commercial heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems globally. A rampant rise is observed in markets of Asia (Japan and China), North America (the United States and Canada), the Australian continent, and Africa (South Africa) by reaching 20 000 CO2‐stores around the globe. The European markets are leading the utilization of CO2 in the heat pump, and refrigeration, CO2 based markets estimate 14% of the total food retail stores (400 m2). Japan is the second leading market of CO2 heat pump and refrigeration with more than 10 200 CO2 condensing units. CO2 transcritical systems have a share of more than 10% in only European market (large stores); however, their share is less than 10% of total stores in other major markets of the world. New pump and compressor‐driven transcritical CO2 systems integrate ejectors, condensers, and booster systems to reduce energy consumptions, enhance efficiency, efficacy, and coefficient of performance. This article reports a critical review of the CO2 based heating, cooling, and refrigeration system and presents updated literature along with barriers and challenges on commercial use of Natref‐based heating and cooling applications worldwide.

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Section: Sun Powered Co2 Systemsmentioning

confidence: 99%

Section: Supercritical Co 2 Systemsmentioning

confidence: 99%

Review of carbon dioxide (CO ₂ ) based heating and cooling technologies: Past, present, and future outlook

2019

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“…针对S-CO 2 锅炉面临的高质量流量问题, Xu等人 [17] 提出了分流吸热的锅炉受热面布置形式, 该方法能够解决锅炉受热面布置的难题. Yang 等人 [18] 针对π式煤粉炉构建了与Mecheri等人相似的热力循环 , 循环采用一次再热布置 , 并构建了 300 MW煤粉炉模型, 分析了受热面的吸热特性. [19] 计算得出, REFPROP 内置了CO 2 的状态方程, 该方程是由Span等人 [20] 基于实验数据拟合得到的, 具有较高的精度 [21] , 被广…”

Section: 论文unclassified

Thermodynamics analysis of S-CO<sub>2</sub> recompression-reheating cycle for coal fired power plant

Sun¹,

Zheng²,

Wang³

et al. 2018

Chin. Sci. Bull.

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“…From the perspective of physical property, CO 2 has relatively low critical parameters (critical pressure P cr = 7.38 MPa, critical temperature T cr = 304.25 K), and it is difficult to oxidize between CO 2 and metal materials, which makes it possible to raise steam parameters including pressure and temperature for improving thermal efficiency [1]. Therefore, supercritical CO 2 Brayton cycle has gradually become a research issue all over the world [2][3][4][5][6]. It is no doubt that heat transfer from heat source to supercritical CO 2 is carried out through heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis on Heat Transfer Characteristics of Supercritical CO2 in Heated Vertical Up-Flow Tube

Yan

Zhu

et al. 2020

Materials

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It is great significance to understand the mechanism of heat transfer deterioration of supercritical CO2 for heat exchanger design and safe operation in the supercritical CO2 Brayton cycle. Three-dimensional steady-state numerical simulation was performed to investigate the behavior of supercritical CO2 heat transfer in heated vertical up-flow tube with inner diameter di = 10 mm and heated length Lh = 2000 mm. Based on the characteristics of inverted-annular film boiling at subcritical pressure, the heat transfer model of supercritical CO2 flowing in the heated vertical tube was established in this paper. The mechanisms of heat transfer deterioration (HTD) and heat transfer recovery (HTR) for supercritical CO2 were discussed. Numerical results demonstrate that HTD is affected by multiple factors, such as the thickness and property of vapor-like film near the wall, the turbulence intensity near the interface between liquid-like and vapor-like, and in the liquid-like core region as well as the distribution of radial velocity vector. Among the above factors, the change of turbulent kinetic energy caused by the buoyancy effect seems to be a more important contributor to HTD and HTR. Furthermore, the influences of heat flux and mass flux on the distribution of wall temperature were analyzed, respectively. The reasons for the difference in wall temperature at different heat fluxes and mass fluxes were explained by capturing detailed thermal physical properties and turbulence fields. The present investigation can provide valuable information for the design optimization and safe operation of a supercritical CO2 heat exchanger.

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Coupled simulation of the combustion and fluid heating of a 300 MW supercritical CO2 boiler

Cited by 76 publications

References 23 publications

Review of carbon dioxide (CO ₂ ) based heating and cooling technologies: Past, present, and future outlook

Review of carbon dioxide (CO ₂ ) based heating and cooling technologies: Past, present, and future outlook

Thermodynamics analysis of S-CO<sub>2</sub> recompression-reheating cycle for coal fired power plant

Numerical Analysis on Heat Transfer Characteristics of Supercritical CO2 in Heated Vertical Up-Flow Tube

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Coupled simulation of the combustion and fluid heating of a 300 MW supercritical CO2 boiler

Cited by 76 publications

References 23 publications

Review of carbon dioxide (CO 2 ) based heating and cooling technologies: Past, present, and future outlook

Review of carbon dioxide (CO 2 ) based heating and cooling technologies: Past, present, and future outlook

Thermodynamics analysis of S-CO&lt;sub&gt;2&lt;/sub&gt; recompression-reheating cycle for coal fired power plant

Numerical Analysis on Heat Transfer Characteristics of Supercritical CO2 in Heated Vertical Up-Flow Tube

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Review of carbon dioxide (CO ₂ ) based heating and cooling technologies: Past, present, and future outlook

Review of carbon dioxide (CO ₂ ) based heating and cooling technologies: Past, present, and future outlook

Thermodynamics analysis of S-CO<sub>2</sub> recompression-reheating cycle for coal fired power plant