Enlarged operation ranges for thermosiphon reboilers using pillow plates

Goedecke, Robert; Scholl, Stephan

doi:10.1016/j.cherd.2015.05.037

Cited by 25 publications

(14 citation statements)

References 11 publications

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“…To positively influence the performance of thermosiphon reboilers in the lower operating range, two possibilities are available: operating at the optimal static liquid head and modifying the heat transfer area with enhancement techniques. At a static liquid head of 110 %, a thermosiphon reboiler shows significantly improved self‐circulation with a negligibly reduced heat flux in comparison to other static liquid heads 1–4. This submerged condition stabilizes operation in the lower operation range.…”

Section: Introductionmentioning

confidence: 92%

“…This submerged condition stabilizes operation in the lower operation range. For the second option the following heat transfer enhancement techniques were investigated for thermosiphon reboilers: swirl‐flow devices: wire matrix inserts 4–7, static mixer inserts, twisted tape inserts, and helically coiled wire inserts 6, extended surfaces: finned tubes 5, treated surfaces: hydrophobic nanoparticle coated tubes 8 and displaced enhancement devices: pillow plates 3, 9. …”

Section: Introductionmentioning

confidence: 99%

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Use of Wire Matrix Inserts in Thermosiphon Reboilers in the Lower Operating Range

Lü

Jasch

Scholl

2021

Chemie Ingenieur Technik

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For the assessment of separation technologies from an ecological and economic perspective, a case study was performed to investigate the influence of entrainment on energy and resource demand of a single apparatus and on a single production process. Taking the example of the Rectisol process, the influence of droplet entrainment on individual separation equipment as well as on the process as a whole was identified via flowsheet simulation. Based on the calculated mass and energy balances, an LCA and LCC approach was used for the quantification of the entrainment influence.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Use of Wire Matrix Inserts in Thermosiphon Reboilers in the Lower Operating Range

Lü

Jasch

Scholl

2021

Chemie Ingenieur Technik

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“…for pillow plates). Reif et al investigated finned tube HEX employed for condensation whereas Goedecke and Scholl investigated pillow plate HEX in a thermosiphon reboiler . In Fig.…”

Section: Equipment Concepts – Design and Specificationmentioning

confidence: 99%

“…correspondingly shows details of the pillow plate geometries. Apart from the welding point patterns, especially the maximum plate expansion h e as well as the maximum plate distance h d are in this case relevant for the calculation of the hydraulic diameter .…”

Section: Equipment Concepts – Design and Specificationmentioning

confidence: 99%

Estimation of Efficiency Potentials Generated by Innovative Equipment Technologies

et al. 2018

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The integration of innovative equipment technologies in production processes offers efficiency potentials with regards to energy and resource demand as well as investment and operating costs. For the estimation of these potentials, a sufficiently detailed database is necessary as well as the possibility to consider particular boundary conditions of the production process, infrastructure of the production site, and the overall plant design. A structured concept for the selection of suitable equipment technol-ogies and sizing rules for the design of the equipment for a desired process task are presented in this review. The combination with an appropriate modeling approach allows a holistic assessment of technically feasible solutions to quantify economic and ecological efficiency potentials of the equipment technologies. The application of this concept is demonstrated on the task of a typical heat transfer problem in the special chemicals sector.

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“…The application of two-phase (liquid and vapor) thermosiphon is generally wider. It is also used in nuclear systems [24] but in addition, it can be used in the cooling of super-conductors [24], thermal diodes [25], gas turbines [26] or in electronics cooling [16], latent heat thermal storage systems [27], household refrigerator applications [28] and as distillation column reboilers [29]. Reverse two-phase thermosiphons have great potential to operate in solar installations [30] (heat source situated above the heat sink) but due to technical imperfections, these devices have not yet found a wide practical application.…”

Section: Introductionmentioning

confidence: 99%

Flow Boiling in Minigap in the Reversed Two-Phase Thermosiphon Loop

2019

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The paper presents the results of experimental investigations of a model of a heat exchanger featuring a minigap, which is perceived as an evaporator for an inverted thermosiphon. The system works with a single component test fluid. The tested evaporator generates pumping power in the test loop in a way similar to the mammoth pump. The tests regarded a module of the heat exchanger, consisting of a hot leg and a cold leg with the width by the length of 0.1 × 0.2 m, heated by a uniform heat flux. In the tests, the minigaps of 1, 2 and 3 mm were formed. Two fluids, namely, distilled water and ethanol, were tested in the facility. Two-phase flow structures for both working fluids and various operational parameters, together with comprehensive visualization material, are presented. The specifics of pressure changes and its influence on operating parameters and flow structure are discussed.

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Enlarged operation ranges for thermosiphon reboilers using pillow plates

Cited by 25 publications

References 11 publications

Use of Wire Matrix Inserts in Thermosiphon Reboilers in the Lower Operating Range

Use of Wire Matrix Inserts in Thermosiphon Reboilers in the Lower Operating Range

Estimation of Efficiency Potentials Generated by Innovative Equipment Technologies

Flow Boiling in Minigap in the Reversed Two-Phase Thermosiphon Loop

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