Measurements of Aluminum-Annealed Pyrolytic Graphite Composite Baseplates with Improved Thermal Conductivity

Annealed pyrolytic graphite (APG) is a material with thermal conductivity of about 1500 W/(m·K). This property may enable the usage of APG’s thermal potential to develop highly thermally conductive composites for devices requiring effective thermal management. In this paper, APG has been encapsulated in aluminum by brazing, and the thermal properties of Al-APG composite baseplates were measured. The results show that the thermal conductivity of the Al-APG composite baseplates is about 620 W/(m·K), which is four times higher than the pure aluminum plate (152 W/(m·K)).

An Application of the Internet of Things on Sustainable Aquaculture System

Hydroponics is one of the human significant food sources. This paper proposed the model of the system, Feasible Fish-Farming System (SFFS), which can make the water cultivating framework more practical, employing applying the Internet of things (IoT) to lessen the need for energy for controlling the climate. Little freshwater fish species (SFFs) (length <25 cm) are exceptionally plentiful in nutrient A, calcium, iron and so on and consequently can add to social wellbeing through a supplement to country networks. Under the pressing factor of broad current rural practices and aimless collecting, loads of SFFs are step by step declining, and their environments and favourable places are likewise being crumbled at a quicker rate. A superior protectionist approach could be the carp-SFFS combination which will decrease aimless mass catch fishing of SFFs and will guarantee the preservation of normal SFFs stocks in their territories giving financial advantage to partners. Various investigations have effectively showed an example of overcoming adversity of SFF polyculture through carp—SFFs joining. This creation cum preservation practice prompts manageability—a superior term in the fishery is 'social fishery'. The part that needs consideration is the taking care of nature of SFFs to comprehend inside and between species (with carps) food apportioning and living space inclination as better culture cum conservational approach. Exploration in hydroponics is a contribution to increment settled creation. In the last decade, different researchers have supported attempts that came about in advancing current creation advances that have altered homestead creation. Fish developing is having the chance to be a champion among the most remunerating ambitious activities on account of the low advancement, insignificant exertion course of action-adventure and the 3 to half-year gathering cycles. IoT advancements have altered homestead creation in the country. In this paper, we propose an idea to distinguish far off observing the fish cultivating framework by utilizing the different sensors to diminish the dangers. In this paper, we utilize different sensors like pH worth, temperature and level sensors. By utilizing these sensors, all the work is mechanized, and it will likewise be not challenging to screen the fish cultivating distantly from other areas. The SFFS coordinates the sun-based homestead and fish-ranch to lessen the additional energy input. Furthermore, the lighting of LEDs is utilized to help the photosynthesis in the evening. This way is more energy-proficient than the customary siphoning. Besides, this model shows the subjective accessibility of SFFS.

Dynamic Mechanical Analysis of Hybrid Composites of Discarded Fishnet and Glass Fibre Reinforcement with Polyester Matrix

Polyester based composites were fabricated and characterized for their tensile, morphological and dynamic mechanical properties such as storage and loss moduli as a function of temperature. The morphological attributes were characterized by scanning electron microscopy (SEM) and COSLAB microscope. The morphological investigations have revealed a uniformly distributed polyester matrix of the composites. Dynamic mechanical analysis (DMA) revealed an enhancement in the energy dissipation ability of the composite 4GF and an average storage modulus of the composite 3GF/1FN relative to the soft polyester phase. The tensile modulus and tensile strength increased up to 0.5 %, accompanied by while the strain at break remained largely unaffected. Fractured surface morphology indicates that the failure mode of the composites undergoes a switch-over from matrix-controlled shear deformation to the filler-controlled loading of the composites for specific applications. Hence, the utilization of discarded fishnet incorporated composites mitigates the problem of waste disposal.

A Study on Importance of Quality Function Deployment in Hospital Sector

To sustain a healthy society, hospitals play a vital role and are considered a significant player in maintaining the happiness of the people in every nation. In this paper, an attempt has been made to highlight the importance of Quality Function Deployment (QFD) in the health care industry. QFD is a technique adopted and implemented in various industries. The primary purpose is to translate customer voice into technical language. The components of the House of Quality matrix are briefed, which can be easily understood and follow. The practicality of each component has to be studied. The implementation approach is suggested, and the outcome can be visualized as continuous improvement in customer satisfaction. The decision-makers get a clear awareness about their strengths, weaknesses, opportunities and threats (SWOT). A clear understanding of the technical correlations help the top-level managers to implement QFD in a smooth manner

A Study on the Joining Technology of Copper-Aluminium Composite Heat-Dissipating Components

Copper-aluminium composite heat dissipation components have both the high thermal conductivity of copper and the low density of aluminium. Copper and aluminium are dissimilar materials as they have significant differences in physical and chemical properties, and hence it is not easy to weld them together. In this paper, the joining of copper to aluminium is studied by using the ultrasonic brazing technique. The results show that the copper and aluminium can be connected by ultrasonic brazing, and it is found that the bonding of the copper side interface is the weak link of the entire joint, but the joint strength can still reach 95MPa.

Performance Improvement of a Household Refrigerator using Phase Change Material

Thermal energy storage through phase change material has been used for wide applications in the field of air conditioning and refrigeration. The specific use of this thermal storage has been for energy storage during low demand and release of this energy during peak loads with potential to provide energy savings due to this. The principle of latent heat storage using phase change materials (PCMs) can be incorporated into a thermal storage system suitable for using deep freezers. The evaporator is covered with another box which has storage capacity or passage through phase change material. The results revealed that the performance is increased from 3.2 to 3.5 by using PCM.

D.C. Magnetron Sputtering Coating on Trenches

The development and application of plasma processing such as plasma assisted CVD and PVD become highly important in various industrial fields such as microelectronics, sensors, solar cells, automobiles, cutting tools, etc. In PVD different process are used such as Vacuum Evaporation, Electron Beam evaporation, Sputtering etc. But all processes have common limitation of one as such deposition is inline sight. It is difficult to achieve uniform coating on complex surfaces, holes and trenches. The width dimension and higher aspect ratio (Depth: width >1) of trenches generally in compatible with sputter deposition. When aspect ratio is increased, undesirable discontinuity can be observed at the lower half compared to upper half of trenches. So that 3 axis rotation of substrate holder was designed with a stepper motors to get uniform coating on complex surfaces and holes. The angle of rotation and the speed are controlled by programmed micro controller. By positioning the surface features perpendicular to the plasma the holes, grooves are coated uniformly. The coating was characterized using X-ray diffractometer, SEM and micro hardness tester.

Experimental Analysis on Mechanical Properties of Natural Bio-Polymer Composite

Bio-composites are used in many engineering applications due to various desirable properties that they offer such as light weight, low cost, bio-degradable and bio-compatible. Bio-composites are used in many industries such as automotive, sporting goods, marine, electrical and household appliances. Kenaf, jute, banana, flux is used as fibers. The mechanical properties are evaluated by appropriate testing methods. The strength of material is important to each material so that bio-material to be evaluated by mechanical testing methods. In this study an attempt is made to prepare natural resin with neem oil and Thennamarakudi oil and to fabricate Bio-composite with fish shell and screw pine fiber as reinforcement and test for its mechanical properties such as tensile, Impact and Flexural. The pure resin samples have tensile and flexible properties. After taken testing. the neem oil-based biomaterial flexibility is higher than the oil-based biomaterial. The stiffness is higher in Tk oil-based biomaterial. The result is expected from the biomaterial as eco-friendly material and applicable for medical field as biocompatible

Experimental Analysis on Acoustic, Vibration and Moisture Absorption Properties of Natural Bio-Polymer Composite

Composites Materials- Aircraft, Ship, Automobile. Their most attractive properties are the high strength-to-weight ratio. Polymer composites are used because overall properties of the composites are superior to those of the individual polymers. The natural bio-resin are prepared from neem and Thennamarakudi oil with the concept of polyester resin. The reinforcement is screw pine fibre and fish scale fibre. The aim of this experimental study has targeted to investigate the vibration damping, sound absorption and moisture absorption of reinforced polyester resin polymer composites. The specimen fabricated are naturally bio-degradable and eco-friendly to environment because the resin and fibre are natural ingredients. Mainly to avoid all types of pollution. The laminated specimens were fabricate using hand lay-up technique and the specimens are subjected to the investigated as per the ASTM standards. The Moisture absorption test, Vibration test, Acoustics test were carried out on the laminated specimen to determine their properties.

Study on The Mechanical Properties of Roselle Fiber and Palm Seed Powder Reinforced Epoxy Hybrid Composite

Recently, due to increasing environmental concerns, scientists and researchers have been replacing synthetic fibers with natural fibers as the main component in composites. Roselle is one suitable natural fiber. The plant’s history, physical description, cultural methods, and usages were explained to further understand this potential plant. It is clear that extensive research has been performed on the fiber extraction methods, properties, and possible surface treatments of Roselle fibers to enhance its properties in the manufacturing of natural-fiber-reinforced polymer composites.Also Epoxy hybrid Palm Seed powder with Roselle fiber to strengthen the materials; however, no review has covered the properties and applications of Roselle fibers and palm seed powders in detail. Thus we have investigated Tensile, Impact, Flexural and Water absorption test of Roselle fiber and Palm Seed powder composite. Therefore, a study was performed on Roselle fiber to determine its potential to enable a better selection of materials to produce composites for potential applications in the construction and building, automotive, and aerospace industries.