Modular Spiral Heat Exchanger Thermal Modelling

Červenka, Bystrík; Holubčík, Michal; Drga, Juraj; Malcho, Milan

doi:10.3390/app12125805

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…The development of efficient heat exchangers is currently an important engineering task, as pointed out in very recent papers by Križo et al [ 38 ] and Červenka et al [ 39 ]. Consequently, the study has also a practical aspect of providing data for the development of efficient heat exchangers with the use of highly precise, efficient, and reliable laser technology.…”

Section: Introductionmentioning

confidence: 99%

Laser Treatment of Surfaces for Pool Boiling Heat Transfer Enhancement

et al. 2023

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The laser treatment of surfaces enables the alteration of their morphology and makes them suitable for various applications. This paper discusses the use of a laser beam to develop surface features that enhance pool boiling heat transfer. Two types of structures (in the ‘macro’ and ‘micro’ scale) were created on the samples: microfins (grooves) and surface roughness. The impact of the pulse duration and scanning velocity on the height of the microfins and surface roughness at the bottom of the grooves was analyzed with a high precision optical profilometer and microscope. The results indicated that the highest microfins and surface roughness were obtained with a pulse duration of 250 ns and scanning velocity of 200 mm/s. In addition, the influence of the ‘macro’ and ‘micro’ scale modifications on the boiling heat transfer of distilled water and ethyl alcohol was studied on horizontal samples heated with an electric heater. The largest enhancement was obtained for the highest microfins and roughest surfaces, especially at small superheats. Heat flux dissipated from the samples containing microfins of 0.4 mm height was, maximally, over three times (for water) and two times (for ethanol) higher than for the samples with smaller microfins (0.2 mm high). Thus, a modification of a selected model of boiling heat transfer was developed so that it would be applicable to laser-processed surfaces. The correlation proved to be quite successful, with almost all experimental data falling within the ±100% agreement bands.

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Section: Introductionmentioning

confidence: 99%

Laser Treatment of Surfaces for Pool Boiling Heat Transfer Enhancement

et al. 2023

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Experimental Study of Heat Technical Parameters of a Shell and Tube Heat Exchanger With a Spiral Coil

Kuschev,

Uvarov,

Kryukov

et al. 2023

Bulletin of Belgorod State Technological University Named After. V. G. Shukhov

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In the Russian Federation, housing and communal services are one of the sectors of the national economy. To provide consumers with heat and maintain a given temperature in conditions of constant heating and hot water supply of residential and public buildings, it is necessary to use heat exchangers. When solving engineering problems aimed at improving the design features of heat exchangers, it is necessary first of all to conduct a study of the thermal characteristics of the equipment used. This will allow you to identify equipment shortcomings and offer original lighting or recommendations for improving some elements. This is especially important when developing heat exchangers used in the housing and communal services of the fuel and energy complex of the Russian Federation. In this work, the thermal characteristics of a condenser heat exchanger with a spiral coil, controlled temperature parameters at the outlet of the heating and heated circuits were studied, the heat transfer coefficient K, [W/(m2×°C)], was calculated at various operating temperature conditions, and an algorithm for carrying out a natural experiment in a laboratory setup with a step-by-step description of the actions performed. The conclusions analyzed the results of experimental work on the apparatus, and also formulated proposals for the creation of a locally produced heat exchanger

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Modular Spiral Heat Exchanger Thermal Modelling

Cited by 2 publications

References 14 publications

Laser Treatment of Surfaces for Pool Boiling Heat Transfer Enhancement

Laser Treatment of Surfaces for Pool Boiling Heat Transfer Enhancement

Experimental Study of Heat Technical Parameters of a Shell and Tube Heat Exchanger With a Spiral Coil

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