EXPERIMENTAL STUDY OF HEAT TRANSFER CHARACTERISTICS BASED ON TEMPERATURE VARIATIONS IN WATER COOLING TANK USING MEDIUM SCALE EXPERIMENTAL FACILITY
AGNARINDRA RAHMA LISADAVY (a,1) , MUHAMMAD GANJAR P (a,2), PUTUT HERY SETIAWAN (a,3), ADHIKA ENGGAR PAMUNGKAS (a), PRICYLIA VALENTINA (a), ESA PUTRA ARIESTA (b) FARAKHAN NGADI (c), MULYA JUARSA (a,4*)

(a) Reactor Thermal-Fluids System Development Research Group, Research Center for Nuclear Reactor Technology
Research Organization for Nuclear Energy (BATAN), National Research and Innovation Agency (BRIN)
Building 80, PUSPIPTEK, Tangerang Selatan 15310, Banten
(1) Agna001[at]brin.go.id
(2) muhammad.ganjar.putra[at]brin.go.id
(3) putu003[at]brin.go.id
(4*) corresponding author- mulya.juarsa[at]brin.go.id

(b) Departement of Mechanical and Industrial Engineering, Faculty of Engineering, Gadjah Mada University,
Jl. Grafika No.2, Yogyakarta 55281

(c) Departement of Mechanical Engineering, Faculty of Engineering, Pancasila University,
Jl. Lenteng Agung Raya No.56, RT.1/RW.3, Srengseng Sawah, Kec. Jagakarsa, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12630

Abstract

The failure of the active cooling system during the Fukushima-Daiichi reactor accident which caused the melting of the reactor core became a reference for the development of a passive cooling system for future nuclear reactor safety systems. Research on passive cooling systems based on natural circulation on a medium scale is still rarely carried out. Therefore, it is very important to investigate the performance of the components which consist of a heating section and a cooling section, considering that the natural circulation flow rate will depend on the heat transfer process. This study aims to characterize the heat transfer in WCT component at the FASSIP-03 NT loop as a medium scale experimental facility which has a pipes length total of 11.71 meters with a height difference between the heater and cooler of 3.05 meters. The experiment was carried out using temperature variations on the WHT for steady state condition, with variations of 60\circC, 70\circC, and 80\circC in respectively for experimental time of 72000 seconds. The results of this study obtained the highest value of decreasing the temperature of the hot fluid which was 4.65\circC, also obtained the thermal efficiency of the heat sink from variations in WHT temperature, and showed the relationship of overall heat transfer coefficient and heat transfer, obtained successively: 310.235 W/m^2K- 367.57 W/m^2K- 402.86 W/m^2K.

Keywords: FASSIP-03 NT, heat transfer, medium scale, natural circulation, passive cooling, medium scale

Topic: PHYSICAL SCIENCES