Influence of inlet configuration and distributor geometry on the performance of cryogenic plate-fin heat exchangers

Haider, Patrick; Freko, Pascal; Acher, Thomas; Rehfeldt, Sebastian; Klein, Harald

doi:10.1016/j.applthermaleng.2021.117197

Cited by 26 publications

(22 citation statements)

References 28 publications

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“…The size of the particles and maximum iterations are selected to ensure fast and accurate convergence. 18 The solutions of all particle after each iteration are compared, and the minimum is selected as the best solution. The global minimum is updated if the best solution of the iteration is better than the current global minimum.…”

Section: Parametric Optimizationmentioning

confidence: 99%

“…To attain a better solution at each iteration, the damping factor is used for the gradual transition from the exploration to exploitation of the search space. The size of the particles and maximum iterations are selected to ensure fast and accurate convergence 18 . The solutions of all particle after each iteration are compared, and the minimum is selected as the best solution.…”

Section: Parametric Optimizationmentioning

confidence: 99%

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Roadmap toward energy‐positive upfront nitrogen removal process in baseload LNG plant

Mkacher

Almomani

Pal

et al. 2022

Intl J of Energy Research

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Summary The use of liquefied natural gas (LNG) has grown over the last decade owing to an increase in the global energy demand. This work presents a pioneering approach for rigorous simulation of an actual cold section of an LNG plant and provides a potential process optimization to achieve a higher production rate (PR) while reducing the specific power consumption (SPC). The concept of upfront nitrogen removal (UNrem) from the natural gas (NG) feed was introduced, and the impact on the PR and SPC was presented. We considered seven scenarios with varying percentages of UNrem and compared them with the conventional plant design (base case) while maintaining the product specifications (LNG high heating value [HHV] of 1105 Btu/Scf and NGL reid vapor pressure [RVP] of 2042 psia). The results show that UNrem of 87.5% from the NG feed can reduce the total power requirements by 0.24%, increase the production flow rate by 4.4%, and decrease the exergy losses by 0.23% compared with the base case. The UNrem can also have a significant improvement on the plant capacity without the need for structural modifications in the cold section. Future research should focus on the efficiency and feasibility of different UNrem processes as well as examine the use of a large‐scale system.

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Section: Parametric Optimizationmentioning

confidence: 99%

Section: Parametric Optimizationmentioning

confidence: 99%

Roadmap toward energy‐positive upfront nitrogen removal process in baseload LNG plant

Mkacher

Almomani

Pal

et al. 2022

Intl J of Energy Research

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show abstract

“…ASUs separate air into its main components nitrogen (N 2 ), oxygen (O 2 ), and argon (Ar) by means of cryogenic distillation. These plants are often used for studies concerning the flexibilization of plant operation as their high energy demand for the compression of air and the possibility to store energy with high energy density using cryogenic liquids entail an outstanding flexibilization potential 1–8 …”

Section: Introductionmentioning

confidence: 99%

Improving the load flexibility of industrial air separation units using a pressure‐driven digital twin

et al. 2022

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Air separation units are one of the prime examples for studies on demand side management and (non-)linear model predictive control due to their high power consumption and energy storage potential. These plants separate ambient air into its main components, nitrogen, oxygen, and argon, by means of cryogenic distillation at different pressure levels. Approximately two thirds of the industrially operated air separation units consider the separation of argon either as a value product or for reasons of energy efficiency. However, most of the studies in literature neglect the separation of argon since this requires additional equipment, increases the heat and process integration and, thus, the complexity of process control. In this work, a digital twin of an air separation unit with argon system is used to analyze and to improve load change procedures. Moreover, the potential of applying the digital twin as a soft sensor is demonstrated.

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“…This is light in weight and well suitable for cryogenic applications 5 . PFHE can accommodate more than 10 streams, so it is more flexible 9 . It is more popular in energy‐based industrial applications due to its energy‐efficient operations 10 .…”

Section: Introductionmentioning

confidence: 99%

Rating and performance of plate fin heat exchanger used for cryogenic separation of CO ₂

Nandakishora

Sahoo

Murugan

et al. 2022

Intl J of Energy Research

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Carbon capture by cryogenic treatment is one of the emerging methods in curbing carbon dioxide (CO 2 ) emissions, because it not only offers energy-saving, but also environmental benefits due to the absence of chemicals as used by other methods. However, the cryogenic system used for CO 2 capture demands a high-effectiveness heat exchanger. In this case, a plate-fin heat exchanger (PFHE) is used. In this study, PFHE is analyzed for decreasing the temperature of CO 2 and N 2 mixture with cold N 2 gas. The study consists of three parts that are (i) a comparative study of Aspen EDR with heat exchanger parameter evaluation correlations such as Joshi & Webb, Manglik & Bergles, and Maiti & Sarangi, and (ii) validation of Aspen EDR software with experimental results which is available from open literature. Hence, validation of heat exchanger design is indirectly done with experimental results. (iii) Besides this, the research is aimed at studying the influence of the gas mixture inlet temperature, the concentration of CO 2 , pressure drop, and the mass flow rate on PFHE's effectiveness. The study results are analyzed and presented in this research article.

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Influence of inlet configuration and distributor geometry on the performance of cryogenic plate-fin heat exchangers

Cited by 26 publications

References 28 publications

Roadmap toward energy‐positive upfront nitrogen removal process in baseload LNG plant

Roadmap toward energy‐positive upfront nitrogen removal process in baseload LNG plant

Improving the load flexibility of industrial air separation units using a pressure‐driven digital twin

Rating and performance of plate fin heat exchanger used for cryogenic separation of CO ₂

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Influence of inlet configuration and distributor geometry on the performance of cryogenic plate-fin heat exchangers

Cited by 26 publications

References 28 publications

Roadmap toward energy‐positive upfront nitrogen removal process in baseload LNG plant

Roadmap toward energy‐positive upfront nitrogen removal process in baseload LNG plant

Improving the load flexibility of industrial air separation units using a pressure‐driven digital twin

Rating and performance of plate fin heat exchanger used for cryogenic separation of CO 2

Contact Info

Product

Resources

About

Rating and performance of plate fin heat exchanger used for cryogenic separation of CO ₂