Experimental Analysis of a Single-Phase Passive Cooling System

Bastos, João Pedro Tinoco; Couto, Danillo César Soares; Gonçalves, Gabriel Cerqueira; Lima, Leon Matos Ribeiro de; Mangiavacchi, Norberto

doi:10.5380/rber.v7i2.58298

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…The main observation in the experiments was thermal behavior at several zones in the NCL that was detected by K‐type thermocouples. Research conducted in papers 37,38 showed that the natural circulation loop reached a stable condition in less than 35 minutes. Therefore, the experiments were carried out for 60 minutes in each natural circulation loop configuration.…”

Section: Resultsmentioning

confidence: 99%

Experimental and simulation approach of the loop geometry effect on the natural circulation system of the advanced nuclear reactor

2020

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Summary Lately, natural circulation has become an exciting topic because it has been proposed and applied in some advanced nuclear reactors as a passive safety system. The aim of the present study is to examine the effect of the loop geometry on the natural circulation based cooling system of a given power source. The experimental approach was achieved by the construction of two natural circulation loops with vertical heater and vertical cooler. Both circulation loops were built with a same vertical length of 100 cm and different horizontal lengths, each of 50 and 100 cm, respectively. The heater was realized with a stainless pipe wrapped by a Nichrome wire, whereas the cooling system was designed and built as a pipe in 30 cm long square tube. Thus, the cooling water will circulate around the pipe loop inside the rectangular cooling chamber. The temperature data acquisition was achieved via an Arduino‐based system, controlling four K‐type thermocouple sensors. The numerical simulation part in the present work, was carried out by the COMSOL Multiphysics software, using the dedicated heat transfer and fluid dynamic module, namely the computational fluid dynamic module. The experimental data were considered to parameterize the COMSOL input model. The experimental results showed a clear difference between two passive cooling loops according to the horizontal length. The doublings of the horizontal and vertical lengths of the loop have a direct effect on the fluid flow rate.

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Section: Resultsmentioning

confidence: 99%

Experimental and simulation approach of the loop geometry effect on the natural circulation system of the advanced nuclear reactor

2020

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Experimental Study of Thermal Behavior of a Single-phase Natural Circulation Loop with Vertical Heater and Cooler

Hariyanto

Permana

2021

J. Phys.: Conf. Ser.

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The natural circulation systems have been widely applied to various technologies, for example, safety systems in molten salt reactors. Hence the instability of the natural circulation system became an exciting topic to study. This study aimed to find out the effect of horizontal width variation on the thermal behavior of a single-phase natural circulation loop (NCL) with vertical heater and vertical cooler. Three loops with horizontal widths of 50 cm, 100 cm, and 150 cm, respectively, were designed for experimental studies. Meanwhile, the vertical height of all three loops was 100 cm. The cooler was installed vertically on the upper arm of the loop to cool the fluid. The heater was installed vertically on the forearm on the other side of the loop to heat the fluid. K-type thermocouples integrated with the data acquisition system were used to measure the temperature distribution in several zones of the loop directly. The conclusion obtained in this study was a single-phase natural circulation loop with vertical heater and vertical cooler did not indicate a reversal of the direction of heat transfer at each operating power and geometry configuration. This study is expected to be one of the references to the design of a single-phase natural circulation loop as an advanced nuclear reactor passive safety system.

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Experimental Analysis of a Single-Phase Passive Cooling System

Cited by 2 publications

References 5 publications

Experimental and simulation approach of the loop geometry effect on the natural circulation system of the advanced nuclear reactor

Experimental and simulation approach of the loop geometry effect on the natural circulation system of the advanced nuclear reactor

Experimental Study of Thermal Behavior of a Single-phase Natural Circulation Loop with Vertical Heater and Cooler

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