scholarly journals Mechanical and Physical Properties of Khaya senegalensis Solid Fuel Pellet with Different Binder Percentages

2021 ◽  
Vol 2051 (1) ◽  
pp. 012037
Author(s):  
Ras Izzati Binti Ismail ◽  
Abd Razak Shaari ◽  
Khor Chu Yee ◽  
Alina Rahayu Mohamed ◽  
Muhammad Syakirin Bin Abd Rahim ◽  
...  
Keyword(s):  
Solid Fuel ◽  
International Standards ◽  
Fuel Pellet ◽  
Pellet Quality ◽  
Fuel Pellets ◽  
Increased Risk ◽  
High Pollution ◽  
Pollution Emissions ◽  
Strength And Durability ◽  
And Storage

Abstract The characteristics of the solid fuel pellets, such as its strength, durability and density can be used to assess its quality. During the transport and storage, pellets with low strength and durability produces dusts and ultimately resulting in equipment blockage, high pollution emissions, and an increased risk of fire and explosion. Therefore, pellet manufacturing process should be given priority to improve pellet quality. The use of binder in the production of pellets will aid in improving pellet quality. Therefore, this study investigates the influence of different binder percentages on the mechanical properties of K. senegelensis fuel pellets. Durability, unit density, bulk density and diametral compressive strength testing were carried out in compliance with international standards. It was discovered that pellets containing 4% cassava starch binder produces better results, particularly in terms of durability and compressive ldiametral strength.

Effect of Dual Surface Cooling on the Temperature Distribution of a Nuclear Fuel Pellet

2018 ◽  
Vol 769 ◽  
pp. 296-310
Author(s):  
Odii Christopher Joseph ◽  
Agyekum Ephraim Bonah ◽  
Bright Kwame Afornu
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Nuclear Fuel ◽  
Solid Fuel ◽  
Nucleate Boiling ◽  
Temperature Management ◽  
Fuel Pellet ◽  
Surface Cooling ◽  
Fuel Pellets ◽  
External Cooling

Heat removal from nuclear reactor core has been one of the major Engineering considerations in the construction of nuclear power plant. At the center of this consideration is the nuclear fuel pellet whose burning efficiency determines the rate of heat transfer to the coolant. This research, focuses on the study of temperature distribution of solid fuel, temperature distribution of annular fuel with external cooling and the temperature distribution of annular fuel with internal and external cooling. We analyzed the different distribution and made a conclusion on the possibility of improving temperature management of Nuclear fuel rod, by designing fuel pellets based on this geometrical and thermal Analysis. To date, a lot of studies has been done on the thermal and geometrical properties of Nuclear fuel pellet, it is observed that annular fuel pellet with simulteneous internal and external cooling can achieve better temperature distribution which leads to high linear heat generation rate, thus generating more power in the design [1]. It has also been observed that annular fuel pellets has low fission gas release [10]. In large LOCA, the peak cladding temperature of annular fuel is about 600 which is significantly less than that of solid fuel (920 ), this is due to the fact that annular fuel cladding has lower initial temperature and the thinner annular fuel can be cooled more efficiently than the solid fuel. One of drawbacks of annular fuel technology is “the fuel gap conductance assymmetry” which is caused by outward thermal expansion, it has a potential effect on the MDNBR (Minimum Departure from Nucleate Boiling Ratio), which is the minimum ratio of the critical to actual heat flux found in the core [10]. In this model, we used the ceramic fuel pellet of UO2 as our case study. All the parameters in this model are assumed parameters of UO2. The Heat Transfer tool (ANSYS APDL) was used to validate the Analytical Model of this research.

scholarly journals Influence of blending proportions of Teak Sawdust and Cajuput leaves on characteristics of biomass pellets

2020 ◽  
Vol 187 ◽  
pp. 03001
Author(s):  
Wassachol Wattana ◽  
Nattaya Montri ◽  
Manussavee Wongjanakul ◽  
Yingyot Naratta ◽  
Sansanee Duangjinda
Keyword(s):  
Moisture Content ◽  
Physical Properties ◽  
Bulk Density ◽  
Solid Fuel ◽  
Alternative Fuel ◽  
Sustainable Production ◽  
Fuel Pellet ◽  
Fuel Pellets

Fuel pellets made from biomass is considered as a solid fuel that is also an alternative fuel which can substitute for the current fuels and can be considered as a fuel that has sustainable production. This research is the study of the production of fuel pellets from Teak sawdust blends with Cajuput leaves at five proportions by weight of Teak sawdust 100%, Cajuput leaves 100%, Teak sawdust 75% +Cajuput leaves 25%, Teak sawdust 50% +Cajuput leaves 50%, Teak sawdust 25% +Cajuput leaves 75% . The pellets were produced by a grinding and pelleting machine at three different speeds of 200, 250, and 300 rpm. After that, the quality of fuel pellets was evaluated by the physical properties as pellet dimensions, particles and bulk density, as well as moisture content and durability. The results show that blending proportion of Teak sawdust 75% and Cajuput leaves 25% provided the appropriate fuel pellet properties.

scholarly journals The Effect of Different Khaya Senegalensis Raw Feedstock Particle Sizes On Solid Fuel Pellet Quality

2020 ◽  
Vol 864 ◽  
pp. 012101
Author(s):  
Ras Izzati Ismail ◽  
Mohd Iqbal Usamah ◽  
Abdul Razak Shaari ◽  
Khor Chu Yee ◽  
Alina Rahayu Mohamed ◽  
...  
Keyword(s):  
Solid Fuel ◽  
Fuel Pellet ◽  
Particle Sizes ◽  
Pellet Quality ◽  
Khaya Senegalensis

A comparative assessment of solid fuel pellets production from torrefied agro-residues and their blends

2021 ◽  
pp. 105125
Author(s):  
Rifat Mehdi ◽  
Naveed Raza ◽  
Salman Raza Naqvi ◽  
Asif Hussain Khoja ◽  
M. Taqi Mehran ◽  
...  
Keyword(s):  
Solid Fuel ◽  
Comparative Assessment ◽  
Fuel Pellets ◽  
Agro Residues

Health Care Information Systems and the Risk of Privacy Issues for the Disabled

Cyber Crime ◽  
2013 ◽  
pp. 870-890
Author(s):  
John Beswetherick
Keyword(s):  
Health Information ◽  
Clinical Care ◽  
Health Care Information ◽  
Privacy And Security ◽  
Increased Risk ◽  
Health Care Information Systems ◽  
The Disabled ◽  
Care Information ◽  
The Impact ◽  
And Storage

The healthcare industry is moving towards adoption of electronic health records. There are associated privacy and security implications to this move towards electronic collection and storage of sensitive health information. This chapter suggests that the impact on the privacy and security of health information for disabled individuals is greater than that for the general populace. Contributors to this increased risk are related to the increase in dependence on the clinical care system and the related increase in volume of the data that is collected, stored and exchanged as a function of providing care to this population.

PRODUCTION OF PLATELETS FOR TRANSFUSION - CURRENT METHODS AND PROBLEMS TO BE SOLVED

1987 ◽  
Author(s):  
M K Elias ◽  
C Th Smit Sibinga
Keyword(s):  
Whole Blood ◽  
Platelet Rich Plasma ◽  
Synthetic Medium ◽  
Buffy Coat ◽  
Cotton Wool ◽  
Single Donor ◽  
Increased Risk ◽  
Multiple Donors ◽  
And Storage ◽  
Selection Of

Initially, whole blood or platelet rich plasma were used as sources of platelets. Nowadays the methods of platelet concentrates (pc) production adopted in Blood Banks include the traditional method of platelet preparation by differential centrifugation of units of whole blood, besides the much more sophisticated technique of extracorporeal collection of pc with improved immunological compatibility.Manually pc are produced by the platelet rich plasmamethod, the buffy coat method and multiple bag plateletapheresis. The machine collection of pc is done by plateletapheresis or platelet elutriation, with different degrees of automation.The standard manual method remains quantitatively the most important source of platelets.However, there are major concerns:-the need of multiple donors-The high contamination with white cells, predominantly lymphocytes-these pc are depleted from larger and more active platelets, as these are sedimented with the red cells-increased risk of bacterial contamination. To solve these problems there are some potention solutions:-use of single donor collectioon techniques-depletion of leucocytes by:a.elutriation of platelets from the buffy coatb.filtration of random pc through cotton wool columnc. prostacyclin inhibition of platelet aggregation followed by cellulose acetate filtrationd.filtration on elutriated platelets through cotton wool-use of a platelet synthetic medium void of glucose for resuspension and storage of pc to prevent lactate accumulation and pH fall-use of closed sterile harness systems to collect platelets by surge plateletapheresis, which allows extended storage of leucocyte depleted pc.Selection of the most appropriate platelet concentrate depends on the interrelationship of many factors:1) yield 2) function 3) viability after storage 4) afety 5) purity 6) potency 7) efficacy (recovery, survival and haemostatic capacity).

Modeling of MOX Fuel Pellet-Clad Interaction Using ABAQUS

2002 ◽  
Author(s):  
Richard G. Ambrosek ◽  
Robert C. Pedersen ◽  
Amanda Maple
Keyword(s):  
Axial Length ◽  
Fuel Pellet ◽  
Solution Technique ◽  
Outer Diameter ◽  
Symmetric Model ◽  
Post Irradiation ◽  
Fuel Pellets ◽  
Mox Fuel ◽  
Test Reactor

Post-irradiation examination (PIE) has indicated an increase in the outer diameter of fuel pins being irradiated in the Advanced Test Reactor (ATR) for the MOX irradiation program. The diameter increase is the largest in the region between fuel pellets. The fuel pellet was modeled using PATRAN and the model was evaluated using ABAQUS, version 6.2. The results from the analysis indicate the non-uniform clad diameter is caused by interaction between the fuel pellet and the clad. The results also demonstrate that the interaction is not uniform over the pellet axial length, with the largest interaction occurring in the region of the pellet-pellet interface. Results were obtained for an axi-symmetric model and for a 1/8 pie shaped segment, using the coupled temperature-displacement solution technique.

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