The Development of New Microwave Heating Applications at Ontario Hydro'S Research Division

1990 ◽  
Vol 189 ◽  
Author(s):  
Steven J. Oda ◽  
Ibrahim S. Balbaa ◽  
Bruce T. Barber
Keyword(s):  
Microwave Heating ◽  
Energy Savings ◽  
Ceramic Materials ◽  
Industrial Processes ◽  
Test Results ◽  
Selective Heating ◽  
New Device ◽  
Research Division ◽  
Significant Process ◽  
Time And Energy

ABSTRACTThis paper reviews the results from two relatively new microwave heating studies under development at Ontario Hydro's Research Division. The first study involves the development of a hybrid kiln to process advanced ceramics at high temperatures. Using a combination of resistive heating elements and microwave heating, this new device has been operated to show significant process advantages in terms of time and energy savings. A description of the hybrid kiln is presented together with the test results for calcining and sintering a variety of ceramic materials.The second investigation involves the use of microwave heating for the treatment of hazardous wastes. The selective heating ability of microwaves has been applied to reduce the environmental impact of wastes generated from industrial processes. An example is provided to illustrate the advantages and difficulties of applying this technology.

Application of Microwave Heating in Aerospace Composite Processing

2014 ◽  
Vol 564 ◽  
pp. 310-314 ◽  
Author(s):  
Mohd Roshdi Hassan ◽  
Babak Ganjeh
Keyword(s):  
Microwave Heating ◽  
Interaction Mechanism ◽  
Attractive Alternative ◽  
Selective Heating ◽  
Concise Review ◽  
Energy Consuming ◽  
Industrial Level ◽  
Time And Energy ◽  
Materials Behavior ◽  
Heating Technology

Microwave heating technology regarded as a highly time and energy efficient heating technique which recently has acquired attention in aerospace composite manufacturing. Capability of offering exceptional advantages including volumetric and selective heating makes the microwave heating attractive alternative over the conventional highly time and energy consuming autoclave processing. However due to the complexity of interaction mechanism of electromagnetic field and composite materials, applying microwave ovens on an industrial level requires comprehensive experimental and numerical investigation to determine and predict the materials behavior during the curing process. On laboratory scales great potentials of microwave heating in terms of time and energy saving have been proven through several studies, a concise review over these studies is presented in this paper.

scholarly journals The use of nocturnal flights for barrier crossing in a diurnally migrating songbird

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Christie D. Lavallée ◽  
Saeedeh Bani Assadi ◽  
Alicia M. Korpach ◽  
James D. Ray ◽  
Jason D. Fischer ◽  
...  
Keyword(s):  
Energy Savings ◽  
Open Water ◽  
Gps Tracking ◽  
Future Research ◽  
Barrier Crossing ◽  
Migration Patterns ◽  
Migration Strategies ◽  
Diurnal Migrant ◽  
Time And Energy ◽  
High Degree

Abstract Background The migration patterns of land birds can generally be divided into those species that migrate principally during the day and those that migrate during the night. Some species may show individual plasticity in the use of day or night flight, particularly when crossing large, open-water or desert barriers. However, individual plasticity in circadian patterns of migratory flights in diurnally migrating songbirds has never been investigated. Methods We used high precision GPS tracking of a diurnal, migratory swallow, the purple martin (Progne subis), to determine whether individuals were flexible in their spring migration strategies to include some night flight, particularly at barrier crossing. Results Most (91%) of individuals made large (sometimes > 1000 km), open-water crossings of the Caribbean Sea and the Gulf of Mexico that included the use of night flight. 32% of all water crossings were initiated at night, demonstrating that night flight is not only used to complete large crossings but may confer other advantages for diurnal birds. Birds were not more likely to initiate crossings with supportive winds, however crossings were more likely when they reduced travel distances. Our results are consistent with diurnal birds using night flight to help achieve time- and energy-savings through ‘short cuts’ at barrier crossings, at times and locations when foraging opportunities are not available. Conclusions Overall, our results demonstrate the use of nocturnal flight and a high degree of individual plasticity in migration strategies on a circadian scale in a species generally considered to be a diurnal migrant. Nocturnal flights at barrier crossing may provide time and energy savings where foraging opportunities are low in an otherwise diurnal strategy. Future research should target how diel foraging and refueling strategies support nocturnal flights and barrier crossing in this and other diurnal species.

Status Report—Advanced Heat Exchanger Technology for a CCGT Power Generation System

1983 ◽  
Vol 105 (2) ◽  
pp. 348-353 ◽  
Author(s):  
D. E. Wright ◽  
L. L. Tignac
Keyword(s):  
Power Generation ◽  
Heat Exchanger ◽  
Fluidized Bed ◽  
Ceramic Materials ◽  
Department Of Energy ◽  
Test Facility ◽  
Status Report ◽  
Test Results ◽  
Generation System ◽  
Power Generation System

Rocketdyne is under contract to the Department of Energy for the development of heat exchanger technology that will allow coal to be burned for power generation and cogeneration applications. This effort involves both atmospheric fluidized bed and pulverized coal combustion systems. In addition, the heat exchanger designs cover both metallic and ceramic materials for high-temperature operations. This paper reports on the laboratory and small AFB test results completed to date. It also covers the design and installation of a 6×6 ft atmospheric fluidized bed test facility being used to correlate and expand the knowledge gained from the initial tests. The paper concludes by showing the direction this technology is taking and outlining the steps to follow in subsequent programs.

Effects of microwave heating in nanostructured ceramic materials

2010 ◽  
Vol 49 (1-2) ◽  
pp. 31-41 ◽  
Author(s):  
Yu. V. Bykov ◽  
S. V. Egorov ◽  
A. G. Eremeev ◽  
V. V. Kholoptsev ◽  
I. V. Plotnikov ◽  
...  
Keyword(s):  
Microwave Heating ◽  
Ceramic Materials ◽  
Nanostructured Ceramic

Part Repairing Using a Hybrid Manufacturing System

2007 ◽  
Author(s):  
Lan Ren ◽  
Kunnayut Eiamsa-ard ◽  
Jianzhong Ruan ◽  
Frank Liou
Keyword(s):  
Manufacturing System ◽  
Energy Savings ◽  
Welding Process ◽  
Hybrid Manufacturing ◽  
Present Part ◽  
Cutting Processes ◽  
Main Component ◽  
Time And Energy ◽  
The Military ◽  
Welding Processes

At present, part remanufacturing technology is gaining more interest from the military and industries due to the benefits of cost reduction as well as time and energy savings. This paper presents the research on one main component of part remanufacturing technology, which is part repairing. Traditionally, part repairing is done in the repair department using welding processes. However, the limitations of the traditional welding process are becoming more and more noticeable when accuracy and reliability are required. Part repairing strategies have been developed utilizing a hybrid manufacturing system in which the laser-aided deposition and CNC cutting processes are integrated. Part repairing software is developed in order to facilitate the users. The system and the software elevate the repairing process to the next level, in which accuracy, reliability, and efficiency can be achieved. The concept of the repairing process is presented in this paper, and verification and experimental results are also discussed.

scholarly journals SYNTHESIS AND CHARACTERIZATION OF GREENER CERAMIC MATERIALS WITH LOWER THERMAL CONDUCTIVITY USING OLIVE MILL SOLID BYPRODUCT

2020 ◽  
Vol 1 ◽  
pp. 96-106 ◽  
Author(s):  
Xenofon Spiliotis ◽  
Vayos Karayannis ◽  
Stylianos Lamprakopoulos ◽  
Konstantinos Ntampegliotis ◽  
George Papapolymerou
Keyword(s):  
Thermal Conductivity ◽  
Solid Waste ◽  
Energy Savings ◽  
Sintering Temperature ◽  
Ceramic Body ◽  
Ceramic Materials ◽  
Raw Material ◽  
Gravimetric Analysis ◽  
Olive Mill Solid Waste ◽  
Olive Mill

In the current research, the valorization of olive mill solid waste as beneficial admixture into clay bodies for developing greener ceramic materials with lower thermal conductivity, thus with increased thermal insulation capacity towards energy savings, is investigated. Various clay/waste mixtures were prepared. The raw material mixtures were characterized and subjected to thermal gravimetric analysis, in order to optimize the mineral composition and maintain calcium and magnesium oxides content to a minimum. Test specimens were formed employing extrusion and then sintering procedure at different peak temperatures. Apparent density, water absorption capability, mechanical strength, porosity and thermal conductivity were determined on sintered specimens and examined in relation to the waste percentage and sintering temperature. The experimental results showed that ceramic production from clay/olive-mill solid waste mixtures is feasible. In fact, the mechanical properties are not significantly impacted with the incorporation of the waste in the ceramic body. However, the thermal conductivity decreases significantly, which can be of particular interest for thermal insulating materials development. Furthermore, the shape of the produced ceramics does not appear to change with the sintering temperature increase.

Oxygen Enrichment in Combustion Processes: Comparative Experimental Results From Several Application Fields

1991 ◽  
Vol 113 (2) ◽  
pp. 122-126
Author(s):  
M. De Lucia
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Copper Alloys ◽  
Ceramic Materials ◽  
Oxygen Enrichment ◽  
Experimental Results ◽  
Ferrous Metals ◽  
Definition Of ◽  
Application Fields ◽  
Combustion Processes

The effects of using oxygen to partially or wholly replace fuel air in small-size melting furnaces were studied over a range of application fields. Following definition of the useful parameters, testing was conducted on furnaces for melting glass, ferrous metals (pigiron), nonferrous metals (copper alloys), and ceramic materials. In all cases, oxygen-enrichment was found to provide significant energy savings, as well as notable advantages in terms of both plant output and energy consumption.

Micro Machining of Nonconductive Al2O3 Ceramic on Developed TW-ECSM Setup

2012 ◽  
pp. 167-177
Author(s):  
Alakesh Manna ◽  
Amandeep Kundal
Keyword(s):  
Weight Ratio ◽  
High Hardness ◽  
High Strength ◽  
Ceramic Materials ◽  
Actual Condition ◽  
Test Results ◽  
Machining Performance ◽  
Machining Processes ◽  
Al2o3 Ceramic ◽  
Advanced Ceramic

Advanced ceramic materials are gradually becoming very important for their superior properties such as high hardness, wear resistance, chemical resistance, and high strength to weight ratio. But machining of advanced ceramic like Al2O3-ceramics is very difficult by any well known and common machining processes. Normally, cleavages and triangular fractures generate when machining of these materials is done by traditional machining methods. It is essential to develop an efficient and accurate machining method for processing advanced ceramic materials. For effective machining of Al2O3-ceramics, a traveling wire electrochemical spark machining (TW-ECSM) setup has been developed. The developed TW-ECSM setup has been utilized to machine Al2O3 ceramic materials and subsequently test results are utilized to analyze the machining performance characteristic. Different SEM photographs show the actual condition of the micro machined surfaces. The practical research analysis and test results on the machining of Al2O3 ceramics by developed TWECSM setup will provide a new guideline to the researchers and manufacturing engineers.

High Temperature Potting Materials for Wire Bond Encapsulation

2016 ◽  
Vol 2016 (HiTEC) ◽  
pp. 000061-000065
Author(s):  
David Shaddock ◽  
Liang Yin
Keyword(s):  
Weight Loss ◽  
High Temperature ◽  
Ceramic Materials ◽  
Insulation Resistance ◽  
Test Results ◽  
Initial Screening ◽  
Wire Bond ◽  
Wire Bonds

Abstract Test results for a range of potting materials for encapsulation of wire bonds for a high temperature multi-chip module is presented. The potting materials include gels and more rigid epoxies, silicone, and silicone-ceramic materials. The materials were initially screened based on ease of processing, cracking, and weight loss at 200, 225, and 250°C. Materials that performed well after this initial screening were tested for insulation resistance at 200, 225, and 250°C and wire bonds were encapsulated for thermal cycled at −55 to 200°C and −55 to 250°C.

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