Evaluation of an energy supply system with air separation

Nakaiwa, Masaru; Akiya, Takaji; Owa, Masaru; Tanaka, Yasuo

doi:10.1016/0196-8904(95)00787-3

Cited by 40 publications

(18 citation statements)

References 2 publications

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“…To produce liquid nitrogen during cryogenic distillation, a two-column separation process, consisting of low and high pressure columns, has been developed and is widely used. By combining the condenser of the high pressure column with the reboiler of the low pressure column, the latent heat of vaporization of air can be exchanged with the condensation heat of pure nitrogen in the two-column separation process [3][4][5][6][7][8]. Thus, not only is nitrogen liquefied in the process but also the energy consumption of the process can be decreased by heat exchange.…”

Section: Introductionmentioning

confidence: 99%

A novel cryogenic air separation process based on self-heat recuperation

Kansha

Kishimoto

Nakagawa

et al. 2011

Separation and Purification Technology

105

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Section: Introductionmentioning

confidence: 99%

A novel cryogenic air separation process based on self-heat recuperation

Kansha

Kishimoto

Nakagawa

et al. 2011

Separation and Purification Technology

105

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“…This technology provided an excellent idea for the study of thermally integrated distillation columns and also laid a good foundation for the development of heat integration technologies . In 1996, Japanese scholars such as Nakaiwa , broke through the application range of SRV technology and extended the scope of internal heat integration to the entire rectifying section and stripping section to achieve complete heat integration of the individual distillation column itself, and named it “internal HIDiC” (Figure ). Since then, HIDiC has caused a research boom, and a large number of scholars have conducted in-depth research and found that its energy-saving potential is huge. − Since HIDiC was proposed, a variety of configurations have appeared in order to adapt to the application of industry, but the principle of these configurations is the same; the difference lies in the structure of heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Externally Heat-Integrated Multiple Diabatic Distillation Columns (EHIm_xDC): Basic Concept and General Characteristics

Fang

Huang³

et al. 2020

Ind. Eng. Chem. Res.

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This paper introduces a new type of distillation column structure that is externally heat-integrated in multiple diabatic distillation columns (EHImxDC). By matching the temperatures of different column sections (from the same distillation column or different distillation columns), heat integration of different distillation column sections is carried out to improve the thermodynamic reversibility of the distillation operation. First, the structure of the column shell is proposed, which may exist in this kind of distillation column. Second, the mathematical model describing EHImxDC is established, and a concise method is proposed to construct the EHImxDC structure. At last, based on two conventional distillation columns for the separation of a hexane–heptane system and a hexane–octanane system, the heat integration in two diabatic distillation columns (EHImtDC) is established. Through simulation, the results show that the reversibility of EHImtDC is significantly higher than that of the conventional distillation column. By comparing the annual operating costs of the EHImtDC and the double-effect distillation process, it is found that the EHImtDC saved about 10% of the annual operating cost compared to the double-effect distillation process. It can be seen that EHImxDC can greatly improve the second law energy efficiency of the distillation column and reduce the energy consumption of the distillation operation.

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“…In Ref. [18] was proposed a high-performance energy-supply system with cryogenic air separation using the cold of LNG and a power generation system with gas and steam turbines, where the required electrical power is reduced from 1.2 kWh/m 3 (per oxygen steam) to 0.57 kWh/m 3 . In this paper, two different options of a double-column distillation process are discussed.…”

Section: Introductionmentioning

confidence: 99%

Concepts for Regasification of LNG in Industrial Parks

Morosuk¹,

Tesch²,

Tsatsaronis³

2017

Advances in Natural Gas Emerging Technologies

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The exponentially growing markets of liquefied natural gas (LNG) require efficient processes for LNG regasification within import terminals. Usually, the regasification of LNG is accomplished by direct or indirect heating. However, integrating LNG regasification into different processes within industrial parks (mainly processes involving low temperatures) is an efficient approach because of the utilization of the low-temperature energy. In some LNG import terminals, integration technologies are already being used. Previous publications showed an increase in the thermodynamic efficiency for systems combining air separation (as an example) and LNG regasification. In addition, the variation in the efficiency as well as the capital investment depends on the schematic and operation conditions. This fact creates great potential for improving the systems. In this chapter, different schematics are evaluated using exergy-based methods in order to improve the effectiveness of complex industrial processes that can involve LNG regasification.

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Evaluation of an energy supply system with air separation

Cited by 40 publications

References 2 publications

A novel cryogenic air separation process based on self-heat recuperation

A novel cryogenic air separation process based on self-heat recuperation

Externally Heat-Integrated Multiple Diabatic Distillation Columns (EHIm_xDC): Basic Concept and General Characteristics

Concepts for Regasification of LNG in Industrial Parks

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Evaluation of an energy supply system with air separation

Cited by 40 publications

References 2 publications

A novel cryogenic air separation process based on self-heat recuperation

A novel cryogenic air separation process based on self-heat recuperation

Externally Heat-Integrated Multiple Diabatic Distillation Columns (EHImxDC): Basic Concept and General Characteristics

Concepts for Regasification of LNG in Industrial Parks

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Product

Resources

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Externally Heat-Integrated Multiple Diabatic Distillation Columns (EHIm_xDC): Basic Concept and General Characteristics