Keyhole mode laser welding of tantalum, Ti--6Al--4V
... assuming that the temperatures at the keyhole wall reach the boiling point of the different metals or alloys. A turbulence model based on Prandtl’s mixing length hypothesis was used to estimate the effective viscosity and thermal conductivity in the liquid region. The calculated weld cross-sections ...
... assuming that the temperatures at the keyhole wall reach the boiling point of the different metals or alloys. A turbulence model based on Prandtl’s mixing length hypothesis was used to estimate the effective viscosity and thermal conductivity in the liquid region. The calculated weld cross-sections ...
Natural Convection and Entropy Generation in Nanofluid Filled
... and non-uniform heating of bottom wall for a range of Rayleigh and Prandtl numbers using finite element method. They showed that non-uniform heating of the bottom wall produces greater heat transfer rate at the center of the bottom wall than uniform heating. Eyden et al. [11] numerically and experim ...
... and non-uniform heating of bottom wall for a range of Rayleigh and Prandtl numbers using finite element method. They showed that non-uniform heating of the bottom wall produces greater heat transfer rate at the center of the bottom wall than uniform heating. Eyden et al. [11] numerically and experim ...
Transient Exergy Destruction Analysis of a Vapor Compression
... design and operational parameters in many thermal systems from a static point of view. For example, design parameters such as heat exchanger geometry have been optimized using EDM (Nag & De, 1997) (Vargas & Bejan, 2001). As can be seen from Eq. (1), minimizing the exergy destroyed in a system will m ...
... design and operational parameters in many thermal systems from a static point of view. For example, design parameters such as heat exchanger geometry have been optimized using EDM (Nag & De, 1997) (Vargas & Bejan, 2001). As can be seen from Eq. (1), minimizing the exergy destroyed in a system will m ...
TiO2奈米光觸媒濾網應用於空調系統分解甲醛氣體之研究
... to remove VOC nanoparticles from indoor air as they pass though a HVAC system. Such filtering, if effective, would prevent the particles from entering the nostrils, depositing in the lung, and resulting in pulmonary fibrosis or other pathologies to the human occupants of the building. Another advant ...
... to remove VOC nanoparticles from indoor air as they pass though a HVAC system. Such filtering, if effective, would prevent the particles from entering the nostrils, depositing in the lung, and resulting in pulmonary fibrosis or other pathologies to the human occupants of the building. Another advant ...
Wise, R.R., A.J. Olson, S.M. Schrader and T.D. Sharkey. 2004. Electron transport is the functional limitation of photosynthesis in field-grown Pima cotton plants at high temperature. Plant, Cell Environment 27: 717-724.
... High temperature reduces plant growth and can limit crop yields. Estimates range up to a 17% decrease in yield for each degree Centigrade increase in average growing season temperature (Lobell & Asner 2003). Photosynthesis is one component of crop growth that is most sensitive to high temperature an ...
... High temperature reduces plant growth and can limit crop yields. Estimates range up to a 17% decrease in yield for each degree Centigrade increase in average growing season temperature (Lobell & Asner 2003). Photosynthesis is one component of crop growth that is most sensitive to high temperature an ...
Effects of temperature-dependent material properties on welding
... distortion are permanently produced in the welded structures. High tensile residual stresses are known to promote fracture and fatigue, while compressive residual stresses may induce undesired, and often unpredictable, global or local buckling during or after the welding. It is particularly evident ...
... distortion are permanently produced in the welded structures. High tensile residual stresses are known to promote fracture and fatigue, while compressive residual stresses may induce undesired, and often unpredictable, global or local buckling during or after the welding. It is particularly evident ...
Evaluation of heat transfer correlations for HCCI engine modelling
... Combustion in HCCI engines is a controlled auto-ignition of well-mixed fuel, air and residual gas. The thermal conditions of the combustion chamber are governed by chemical kinetics strongly coupled with heat transfer from the hot gas to the walls. The heat losses have a critical effect on HCCI igni ...
... Combustion in HCCI engines is a controlled auto-ignition of well-mixed fuel, air and residual gas. The thermal conditions of the combustion chamber are governed by chemical kinetics strongly coupled with heat transfer from the hot gas to the walls. The heat losses have a critical effect on HCCI igni ...
numerical analysis on substrate melting during plasma
... From above analysis, the maximum substrate surface temperature determines the maximum melting depth. Thus, the factors that determine the maximum substrate surface temperature will influence the maximum melting depth. Fig. 6 shows the interfacial heat transfer coefficient dependence on the maximum s ...
... From above analysis, the maximum substrate surface temperature determines the maximum melting depth. Thus, the factors that determine the maximum substrate surface temperature will influence the maximum melting depth. Fig. 6 shows the interfacial heat transfer coefficient dependence on the maximum s ...
Condensation Targeter II: Modelling surface
... pressure which when combined with the temperature can be used along with psychrometric data to predict both the monthly airspace and surface relative humidity. Moisture movement through a building is far more complex to predict than is heat. Many of the mechanisms by which moisture moves through the ...
... pressure which when combined with the temperature can be used along with psychrometric data to predict both the monthly airspace and surface relative humidity. Moisture movement through a building is far more complex to predict than is heat. Many of the mechanisms by which moisture moves through the ...
Aalborg Universitet ventilation systems
... Scandinavian children spent a large percentage of each day in public care. Children attending day-care centres (DCCs) have increased risk of respiratory and gastrointestinal infections compared to those that stay home, which has large social-economic consequences. The aim of the present study was to ...
... Scandinavian children spent a large percentage of each day in public care. Children attending day-care centres (DCCs) have increased risk of respiratory and gastrointestinal infections compared to those that stay home, which has large social-economic consequences. The aim of the present study was to ...
PROCEEDINGS Editors: Marcel Loomans, Eindhoven University of Technology Marije te Kulve, Maastricht University
... Scandinavian children spent a large percentage of each day in public care. Children attending day-care centres (DCCs) have increased risk of respiratory and gastrointestinal infections compared to those that stay home, which has large social-economic consequences. The aim of the present study was to ...
... Scandinavian children spent a large percentage of each day in public care. Children attending day-care centres (DCCs) have increased risk of respiratory and gastrointestinal infections compared to those that stay home, which has large social-economic consequences. The aim of the present study was to ...
Blanket Concepts and Issues Mohamed Abdou
... • Flibe has low electrical conductivity, low thermal conductivity Concepts considered by US for ITER TBM (but were not selected): – Dual coolant (He-cooled ferritic structures, self-cooled molten salt) – Self-cooled (only with low-melting-point molten salt) ...
... • Flibe has low electrical conductivity, low thermal conductivity Concepts considered by US for ITER TBM (but were not selected): – Dual coolant (He-cooled ferritic structures, self-cooled molten salt) – Self-cooled (only with low-melting-point molten salt) ...
BIPV status report
... priced about 200 €/m above conventional roof products like tiles or shingles. In façade systems, this is different. PV products were priced very similar to conventional façades made from materials like wood, stone or glass. A major factor in the price levels of the BIPV applications was whether stan ...
... priced about 200 €/m above conventional roof products like tiles or shingles. In façade systems, this is different. PV products were priced very similar to conventional façades made from materials like wood, stone or glass. A major factor in the price levels of the BIPV applications was whether stan ...
Influence of the Type of Phase Change Materials Microcapsules on
... nowadays this is an important requirement and frequently demanded by buyers and potential sellers as an important decision parameter. The increase of thermal comfort is achieved by the thermal capacity of the PCM, allowing store and release of energy, keeping the interior temperature sensibly consta ...
... nowadays this is an important requirement and frequently demanded by buyers and potential sellers as an important decision parameter. The increase of thermal comfort is achieved by the thermal capacity of the PCM, allowing store and release of energy, keeping the interior temperature sensibly consta ...
Definition of standardised procedures for testing thermal storage
... This report is the first approach at international level to define appropriate testing procedures for commissioning thermal storage prototypes, either using sensible or latent heat, designed for solar thermal plants. Thermochemical storage and buffer storage (i. e. those intended to protect the comp ...
... This report is the first approach at international level to define appropriate testing procedures for commissioning thermal storage prototypes, either using sensible or latent heat, designed for solar thermal plants. Thermochemical storage and buffer storage (i. e. those intended to protect the comp ...
Evaporators and Condensers
... refrigerant so that it continually flows over the heat transfer surfaces. In some applications the twophase mixture leaving the expansion valve is separated into liquid and vapor components with only the liquid is sent to the evaporator. This reduces the flow through the evaporator. As the liquid ev ...
... refrigerant so that it continually flows over the heat transfer surfaces. In some applications the twophase mixture leaving the expansion valve is separated into liquid and vapor components with only the liquid is sent to the evaporator. This reduces the flow through the evaporator. As the liquid ev ...
H/ t = W/m
... water temperature. By automating temperature recording we hoped to reduce this interaction, therefore eliminate virtually all human error that could result from reading temperature. A thermocouple consists of a junction of two dissimilar metals and an appropriate two wire extension lead. A thermocou ...
... water temperature. By automating temperature recording we hoped to reduce this interaction, therefore eliminate virtually all human error that could result from reading temperature. A thermocouple consists of a junction of two dissimilar metals and an appropriate two wire extension lead. A thermocou ...
REVIEW OF INNOVATIVE DRYING METHODS
... kiln lowers the vapor pressure of water in the air to establish the moisture gradient which acts as the driving mechanism to cause the water to leave the wood. In dehumidification drying a heat pump is used to extract water from the air. This process is shown in Figure 1. Warm, moist air from the ki ...
... kiln lowers the vapor pressure of water in the air to establish the moisture gradient which acts as the driving mechanism to cause the water to leave the wood. In dehumidification drying a heat pump is used to extract water from the air. This process is shown in Figure 1. Warm, moist air from the ki ...
Böttcher N, Watanabe N, Kolditz O OpenGeoSys Tutorial Basics of
... community (www.opengeosys.org). These voluntary contributions are highly ...
... community (www.opengeosys.org). These voluntary contributions are highly ...
RESEARCH ARTICLE Survival and arm abscission are linked to
... O’Connor, 1999; Dzialowski and O’Connor, 2004). Flying insects such as bees or bumblebees keep their thorax hot and their abdomen relatively cool via continuous circulation of hemolymph between the two body regions through a counter-current heat exchanger, with heat being exchanged between outgoing ...
... O’Connor, 1999; Dzialowski and O’Connor, 2004). Flying insects such as bees or bumblebees keep their thorax hot and their abdomen relatively cool via continuous circulation of hemolymph between the two body regions through a counter-current heat exchanger, with heat being exchanged between outgoing ...
Food Thermalization and Moisturization Culinology
... The significance of the correlation of food temperature with wet bulb temperature is realized through equipment design that has the ability to cook food to a selected doneness temperature and hold those foods for hours without burning or overcooking. Doneness temperatures are substantially below 212 ...
... The significance of the correlation of food temperature with wet bulb temperature is realized through equipment design that has the ability to cook food to a selected doneness temperature and hold those foods for hours without burning or overcooking. Doneness temperatures are substantially below 212 ...
Thermochemistry
... The month may vary, depending on whether you live in Maine or Texas, but for most people, the annual fall ritual is pretty much the same. The days get shorter, the temperature drops, and soon it is time to light the household furnace. The furnace at my house, like many, is fueled by natural gas. Hea ...
... The month may vary, depending on whether you live in Maine or Texas, but for most people, the annual fall ritual is pretty much the same. The days get shorter, the temperature drops, and soon it is time to light the household furnace. The furnace at my house, like many, is fueled by natural gas. Hea ...
The Effect of a Low Viscosity Layer on
... In this paper we attempt to find a solution of the following problem. It appears reasonable to expect that if thermal convection occurs in the Earth’s mantle, it may also occur within the Moon and Mars. The dimensions of these latter two bodies are comparable to the thickness of the Earth’s mantle. ...
... In this paper we attempt to find a solution of the following problem. It appears reasonable to expect that if thermal convection occurs in the Earth’s mantle, it may also occur within the Moon and Mars. The dimensions of these latter two bodies are comparable to the thickness of the Earth’s mantle. ...
Reflections on Real (Thermodynamic) Entropy, Disorder and
... Therefore, … ... the so called “waste cooling-heat” in power cycles (like in thermal power plants) is not waste but very useful heat, necessary for thermal compression of cycling medium (steam-into-condensate, for example), without which it will not be possible to ...
... Therefore, … ... the so called “waste cooling-heat” in power cycles (like in thermal power plants) is not waste but very useful heat, necessary for thermal compression of cycling medium (steam-into-condensate, for example), without which it will not be possible to ...