The use of nanoparticle coolants in automotive radiators for motorcycle engines increases the heat transfer rate and facilitates a reduction overall radiator size. In this study, pressure drop green nanofluid (ZrO2-SiO2) based on EG/Water (40:60) were analyzed experimentally compared with base fluids (water, EG/Water). Three different concentrations prepared by adding 0.1 to 0.3% nanofluids (ZrO2-SiO2/EG-Water). Experiments carried out varying coolant flow between 4 18 LPM working...

The nuclear reactor has two types of power reactors based on the function that is used as electrical energy and research radioisotope a producer science technology research.Indonesia three are TRIGA in Bandung with 2 MW Yogyakarta 100 kW PUSPIPTEK Serpong nominal 30 MW.For second fuel elements type currently using cylindrical material, while RSG-GAS Serpong-shaped plate.Reactor can be to predict buffer reactor.However, this problem because limited number existing element.Meanwhile,...

In the last few years, there has not been much research on green nanofluids that come from material resources such as parts of palm oil and natural zircon sand. Green need to be developed improve heat transfer performance. The characterization nanoparticles made synthesis process stability ZrO2-SiO2 Nanofluids-W/EG, different volume concentrations were investigated. experiments carried out using SEM FTIR, nanofluid was investigated for a concentration 0.1-0.3%, UV-Vis, Zeta potential...

To improve the safety of nuclear power plants, a modern NPP such as Advance Pressurize Water Reactor (APWR) is equipped with feature called PCCS (Passive Containment Cooling System), where naturally circulating air cools outer surface containment which used to remove decay heat released inside vessel. The from reactor core will be transferred out through conduction mechanism and natural convection on Then, hot that forms in gap between its baffles rose chimney located at top concrete...

The ternary nanofluids are considered due to their advantages in overcoming the stability drawback of mono and binary nanofluids. This study aims heat transfer performance Al2O3-TiO2-SiO2 plain tube with wire coil under experimental. were formulated using composition ratio 20:16:64 by volume various concentrations ranging from 0.5 3.0%. Thermal conductivity dynamic viscosity measured KD2 Pro Properties Analyzer Brookfield LVDV III Rheometer. Experimental forced convection was carried out a...

The conventional technique for increasing heat dissipation is to increase the surface area exchanging with a transfer fluid. However, enhanced has reached their limit regard improving transfer. Meanwhile, performance of convective depends on characteristics Therefore, researches nanofluids are innovative ways find alternative fluid (coolants) better performances. This paper presents an experimental study natural water-ZrO2 in triangular and rectangular array uniformly heated vertical...

The development of new practices in nuclear research reactor safety aspects and optimization recent reactors needs knowledge on forced convective heat transfer within sub-channels formed between several fuel rods or exchanger tubes, not only the fully developed regime but also developing laminar flow regime. main objective this was to find a correlation equation for calculating coefficient vertical square sub-channels. Recently, simulation study conducted sub-channel Reynolds number range...

To accomplish safety requirements, a set of actions has to be performed following the recommendations IAEA series 35 applied research reactor. Such are considered in modernization old system, improving core cooling system and evaluations. Due complexity process difficulty putting apparatus reactor core, analytical experimental study on determination flow temperature distribution whole coolant channel difficult done. In present work, numerical TRIGA 2000 been carried out using CFD package....

Common energy crisis has modified the national policy which is in beginning based on natural resources becoming technology, therefore capability to understanding basic and applied science needed supporting those policies. National aims at new exploitation, such as nuclear including many efforts increase safety reactor core condition optimize related aspects ability build research with properly design. The previous analysis of modification TRIGA 2000 Reactor design indicates that forced...

The development of new practices in nuclear reactor safety aspects and optimization recent reactors, including the APWR PHWR needs a knowledge on natural convective heat transfer within sub-channels formed among several fuel rods or exchanger tubes. Unfortunately, currently available empirical correlation equations for such modes are limited researches bundle vertical cylinders (especially convection modes) scarcely done. Although boundary layers around may be dominated by their entry...

Nanofluids have great attention in the world due to big potential replace conventional fluids that been used some systems such as automotive, nuclear reactors, solar heating, building and industry. Utilization of indigenous raw material production nanoparticles is a key reach real application nanofluids. The aim this study know effect combination organic agent solgel synthesis on characteristic Al 2 O 3 nanofluids made them. In study, synthesized from local bauxite using method with citric...

This study focused on natural convection heat transfer using a vertical rectangular sub-channel and water as the coolant fluid. To conduct this has been made pipe heaters are equipped with thermocouples. Each heater is five thermocouples along heating pipes. The diameter of each 2.54 cm 45 in length. distance between central pitch 29.5 cm. Test equipment primary cooling system, secondary system exchanger. purpose to obtain new empirical correlations equations sub-channel, especially for...

TRIGA Bandung is a research nuclear reactor owned by Indonesia, located in with power of 2 MWth. Nuclear used as center for applied and development the field application technologies. currently still using cylindrical fuel element, this raises new problem - limited number existing element. The purpose preliminary core design element plate MTR. method modeling simulation comparative porous media non-porous CFD code. This shows velocity flow temperature distribution influence pressure from...

A study on synthesis and characterization of A12O3 nanoparticles from bauxite for water-A12O3 nanofluids as an alternative coolant nuclear non-nuclear applications has been done. The were synthesized by heating AlOOH a precursor derived local bauxite. Al2O3 dispersed in water ultrasonicated to produce nanofluids. XRD data showed that the crystallized gamma alumina with crystallite size 4.5 nm (Debye Scherrer method). Surface area was 195 m2/gram. Data TEM particle smaller than 10 nm....

Corrosion is a common problem in many engineering metals and alloys. Electrochemical methods are commonly instrument to use as tool study the corrosion behavior of alloy. This method was examined interaction between surface alloys corrosive media. The present paper, effects nano particle ZrO2 an additive aqua de mineralized on stainless steel were investigated. impedance spectroscopy (EIS) testing performed both water demineralized contain 0,01% Nano fluid. Surface morphology examination...

Study on convection heat transfer using water-Al2O3 nanofluid as the working fluid in vertical sub-channel has been conducted. The results of study have compared with water-ZrO2 and pure-water fluid. equipment used this experiment is a triangular sub-channel, equipped by primary cooling system, exchanger secondary system. As heating source three cylinders that uniform flux pitch to diameter ratio (P/D) 01:16. Cooling colloid at 0.05 wt. %. Heat from would occur natural or forced convection....

Abstract The corrosion behavior on commercial stainless steel SS 304 in Nano fluids water-Al2O3 system at pH 3 until 7 conditions has been investigated using electrochemical methods. tests were performed with and without the addition chlor to adjust of fluid condition. nano for testing are 3.18,.3.65, 5. 9. technique used this study, open circuit potential (OCP), galvanodynamic polarization impedance spectroscopy (EIS). results showed that (Ecorr) values nanofluid three slightly different...

Indonesia is the largest palm oil producing country in world. In production process, solid waste produced, such as empty fruit bunches, which represent 25%-26% w/w of total raw material for oil. this study, we prepared nano-cellulose through ultrasonication to obtain optimum temperature nano-cellulose. Temperature variations were carried out at 40°C-70°C 30 minutes. The results synthesis process could be seen visually each variation. Characterization analysis...

With regard to safe operation of the TRIGA 2000 reactor at a power 1000 kW, thermal hydraulic analysis has been carried out by using code STAT. The focused on calculation maximum powered fuel element (hottest cannel) concerning heat flux elements, coolant velocities and temperature. In addition, safety margin critical wasalso determined. For current core condition (111 elements in core) for water inlet temperature 32 ° C (design temperature), flow velocity is 28.9 cm/s element. These results...