Natural Circulation Flow Boiling Phenomenon Based on Cooler Temperature Variation Using FASSIP-04 Rectangular-TP Ver.2 Loop

EasyChair Preprint no. 11881

Abstract

Passive cooling systems, which rely on the principle of natural circulation, commonly referred to as passive residual heat removal, can effectively dissipate the decay heat produced by nuclear reactors. Among these systems, the direct passive residual heat removal system is recognized as the most efficient. This study utilized the Loop Rectangular-TP FASSIP-04 Ver.2, operating on a direct heating model, to investigate the characteristics of two-phase natural circulation flow. The primary objective of this research was to gather data on temperature, flow rate, and flow regime characteristics observed during natural circulation. The experimental approach involved adjusting the cooling water temperature to 10°C, 15°C, and 20°C while maintaining a heating power of 5600 watts until reaching a steady-state condition. The findings of the study reveal that an increase in the cooling water temperature results in a more rapid attainment of steady-state conditions and a decrease in the average steady-state temperature. Specifically, the average steady-state temperatures changed to 97.77°C, 97.75°C, and 97.71°C, respectively. Furthermore, with the rise in cooling water temperature, the average Reynolds number increased from 5770 to 7027, indicating the transition to turbulent flow regime.

Keyphrases: Boiling, FASSIP-04 Ver.2, natural circulation, oscillation, Passive cooling system, Reynold number

@Booklet{EasyChair:11881,
  author = {Sunandi Kharisma and Dwi Yuliaji and Adhika Enggar Pamungkas and Arif Adtyas Budiman and Muhammad Rafel and Shendy Akbar Maryadi and Ryan Oktaviandi and Nur Rochman Budiyanto and Putut Hery Setiwan and Wayan Nata Septiadi and Mulya Juarsa},
  title = {Natural Circulation Flow Boiling Phenomenon  Based on Cooler Temperature Variation Using  FASSIP-04 Rectangular-TP Ver.2 Loop},
  howpublished = {EasyChair Preprint no. 11881},

  year = {EasyChair, 2024}}