Adaptive Welding by Fiber Optic Thermographic Sensing: An
... controller. This information would update the process status model in the monitoring unit, which after comparison with the stored data base would produce the appropriate corrective actions. Optical Sensors Optical sensing systems are under extensive development for adaptive welding applications. The ...
... controller. This information would update the process status model in the monitoring unit, which after comparison with the stored data base would produce the appropriate corrective actions. Optical Sensors Optical sensing systems are under extensive development for adaptive welding applications. The ...
A scaling law for approximating porous hydrothermal convection by
... 2009; Spinelli & Harris 2011) or by use of heat sources and sinks (Henstock et al. 1993; Maclennan et al. 2004). In most of those approaches the choice of an elevated equivalent thermal conductivity has been arbitrary or has been based on adjusting the depth of the melt lens at the MOR. From the abo ...
... 2009; Spinelli & Harris 2011) or by use of heat sources and sinks (Henstock et al. 1993; Maclennan et al. 2004). In most of those approaches the choice of an elevated equivalent thermal conductivity has been arbitrary or has been based on adjusting the depth of the melt lens at the MOR. From the abo ...
Hybrid Photothermal Technique for Microscale Thermal Conductivity
... has become my motto in my academic career. I would also like to thank my other committee members, Dr. Leijun Li, Dr. Steven Folkman, and Dr. Byard Wood, for their guidance during my graduate studies. Particularly, I would like to thank Dr. Steven Folkman for his kind help in and out of the class in ...
... has become my motto in my academic career. I would also like to thank my other committee members, Dr. Leijun Li, Dr. Steven Folkman, and Dr. Byard Wood, for their guidance during my graduate studies. Particularly, I would like to thank Dr. Steven Folkman for his kind help in and out of the class in ...
Chen2011-Entransy_a_novel_theory_in_heat_transfer+
... conversion, consumption and conservation. Design considerations to optimize heat transfer have often been taken as the key for better energy utilization and have been evolving into a well-developed knowledge branch in both physics and engineering. During the last several decades and promoted by the ...
... conversion, consumption and conservation. Design considerations to optimize heat transfer have often been taken as the key for better energy utilization and have been evolving into a well-developed knowledge branch in both physics and engineering. During the last several decades and promoted by the ...
Influence of circumferential solar heat flux distribution on the heat
... in tangential direction ...
... in tangential direction ...
Reflections on Real (Thermodynamic) Entropy, Disorder and
... equilibrium and thus irreversible loss of the original work potential (measure of non-equilibrium), by converting (dissipating) other energy forms into the thermal energy (and degrading the latter to lower temperature) accompanied with increase of entropy (randomized equi-partition of energy per abs ...
... equilibrium and thus irreversible loss of the original work potential (measure of non-equilibrium), by converting (dissipating) other energy forms into the thermal energy (and degrading the latter to lower temperature) accompanied with increase of entropy (randomized equi-partition of energy per abs ...
Review on graphite foam as thermal material for heat exchangers
... electronic equipment heat sinks. Little attention was put to the vehicle radiator applications. The major reason is the dust blocking problem. When the open pores in graphite foams are blocked by dust, the cold air can not reach all inter - faces and bring away the heat. Thus, the effective heat tra ...
... electronic equipment heat sinks. Little attention was put to the vehicle radiator applications. The major reason is the dust blocking problem. When the open pores in graphite foams are blocked by dust, the cold air can not reach all inter - faces and bring away the heat. Thus, the effective heat tra ...
Phase change materials characterization (PCM) and thermochemical materials (TCM) development and
... and demand, and therefore to provide heat or cold to the consumers when required independently of when it was obtained. Several ways exist to fulfil this requirement in buildings, the most common one is a water tank. But there are more compact and efficient ways, such as phase change materials (PCM) ...
... and demand, and therefore to provide heat or cold to the consumers when required independently of when it was obtained. Several ways exist to fulfil this requirement in buildings, the most common one is a water tank. But there are more compact and efficient ways, such as phase change materials (PCM) ...
View - OhioLINK Electronic Theses and Dissertations Center
... Director of Thesis: Adil Sharag-Eldin Recent research estimates that windows are responsible for 39% of commercial heating energy use and 28% of commercial cooling energy use; this is equivalent to almost 1.5% of the total U.S. energy consumption (Apte and Arasteh, 2006). In addition, the commercial ...
... Director of Thesis: Adil Sharag-Eldin Recent research estimates that windows are responsible for 39% of commercial heating energy use and 28% of commercial cooling energy use; this is equivalent to almost 1.5% of the total U.S. energy consumption (Apte and Arasteh, 2006). In addition, the commercial ...
Protection against cold in prehospital care: thermal insulation
... was dressed in a modified standard clothing ensemble consisting of a light, two-piece thermal underwear and knee long socks with the addition of thermal gloves and a balaclava.25 The climatic chamber was set to 0°C for the high insulation group, 15°C for the low insulation group, and 25°C for the co ...
... was dressed in a modified standard clothing ensemble consisting of a light, two-piece thermal underwear and knee long socks with the addition of thermal gloves and a balaclava.25 The climatic chamber was set to 0°C for the high insulation group, 15°C for the low insulation group, and 25°C for the co ...
C121
... Refrigeration and air conditioning systems have become an integral part in the design of spaces occupied by people and intended to provide controlled thermal, humidity, cleanliness, and/or other process requirements. As we strive to design these systems, the constraints imposed on the size and/or sp ...
... Refrigeration and air conditioning systems have become an integral part in the design of spaces occupied by people and intended to provide controlled thermal, humidity, cleanliness, and/or other process requirements. As we strive to design these systems, the constraints imposed on the size and/or sp ...
Transient geotherms in Archean continental lithosphere: New
... buoyant with respect to undepleted mantle, which makes it stable against convective overturn [Boyd and McCallister, 1976; Jordan, 1988]. It is a chemical boundary layer and hence may be an important repository of trace elements. Here what matters again is that part of the thermal boundary layer whic ...
... buoyant with respect to undepleted mantle, which makes it stable against convective overturn [Boyd and McCallister, 1976; Jordan, 1988]. It is a chemical boundary layer and hence may be an important repository of trace elements. Here what matters again is that part of the thermal boundary layer whic ...
Thermal properties of graphene: Fundamentals and
... decreases significantly when this 2D material is in contact with a substrate or confined in graphene nanoribbons (GNRs). This behavior is not unexpected, given that phonon propagation in an atomically thin graphene sheet is likely to be very sensitive to surface or edge perturbations. At room temperat ...
... decreases significantly when this 2D material is in contact with a substrate or confined in graphene nanoribbons (GNRs). This behavior is not unexpected, given that phonon propagation in an atomically thin graphene sheet is likely to be very sensitive to surface or edge perturbations. At room temperat ...
Apparent latent heat of evaporation from clothing: attenuation and
... They suggested that in that condition the evaporative cooling of the human body when calculated from clothed mass loss may be underestimated. Furthermore, it was demonstrated that this error was not present for impermeable clothing when plastic foil was wrapped over the skin, which did not affect th ...
... They suggested that in that condition the evaporative cooling of the human body when calculated from clothed mass loss may be underestimated. Furthermore, it was demonstrated that this error was not present for impermeable clothing when plastic foil was wrapped over the skin, which did not affect th ...
Metal foams as compact high performance heat
... coolant is generally preferred over air because of the greater thermal conductivity and specific heat capacitance. In view of these requirements, experiments using a forced liquid coolant are needed not only to investigate the feasibility of using open-cell metal foams as heat exchangers, but also to ...
... coolant is generally preferred over air because of the greater thermal conductivity and specific heat capacitance. In view of these requirements, experiments using a forced liquid coolant are needed not only to investigate the feasibility of using open-cell metal foams as heat exchangers, but also to ...
Crustal geotherm in southern Deccan Basalt
... (Mascarene Ridge located NE of Reunion island) and found a significantly higher heat flow of 6-8 mW m-2 than the reference heat flow predicted for the seafloor age. Therefore, in this study, we examine whether such an anomalous heat flow (although this is low) can be seen in the present-day crustal ...
... (Mascarene Ridge located NE of Reunion island) and found a significantly higher heat flow of 6-8 mW m-2 than the reference heat flow predicted for the seafloor age. Therefore, in this study, we examine whether such an anomalous heat flow (although this is low) can be seen in the present-day crustal ...
ULTRASONIC MICROHEATERS USING PIEZO-CERAMICS
... for MEMS application was discussed. The PZT heaters were found to attain maximum thermal efficiency around the resonance frequency. In selecting the drive frequency, there was a compromise between the maximum temperature, which was achieved at frequency of minimum impedance, and maximum efficiency, ...
... for MEMS application was discussed. The PZT heaters were found to attain maximum thermal efficiency around the resonance frequency. In selecting the drive frequency, there was a compromise between the maximum temperature, which was achieved at frequency of minimum impedance, and maximum efficiency, ...
Pressure-Temperature-Time Paths of Regional - Cin
... enough cases in which this does not dominate, on the length and time scales of heat transfer that are involved in regional metamorphism, to justify the investigation of a conductive model first. There is abundant evidence of the emplacement of granitic, and to a lesser extent mafic and ultramafic, b ...
... enough cases in which this does not dominate, on the length and time scales of heat transfer that are involved in regional metamorphism, to justify the investigation of a conductive model first. There is abundant evidence of the emplacement of granitic, and to a lesser extent mafic and ultramafic, b ...
Thermal Fatigue Life Prediction of Solder Joints in Avionics
... the main focus on electronic equipment for the aerospace industry. In order to accomplish this, the thesis provides design guidelines for power distribution on a double-sided printed circuit board assembly (PBA) as a measure to improve the thermal performance without increasing the weight of the sys ...
... the main focus on electronic equipment for the aerospace industry. In order to accomplish this, the thesis provides design guidelines for power distribution on a double-sided printed circuit board assembly (PBA) as a measure to improve the thermal performance without increasing the weight of the sys ...
thermal and moisture control in insulated assemblies - U
... particularly if the air space is not sealed or of uniform thickness (Palfey 1980). For critical applications, a particular design’s effectiveness should be confirmed by actual test data undertaken by using the ASTM hot box method (ASTM Standard C1363). This test is especially necessary for construct ...
... particularly if the air space is not sealed or of uniform thickness (Palfey 1980). For critical applications, a particular design’s effectiveness should be confirmed by actual test data undertaken by using the ASTM hot box method (ASTM Standard C1363). This test is especially necessary for construct ...
Heat transfer and air flow in a domestic refrigerator
... zones. The brewed type is a static refrigerator equipped with a fan (Figure 16.1b). It allows air circulation and the temperature decreases rapidly after door opening. Air temperature is more homogeneous in this case than in the static type but the energy consumption is higher due to the fan. In a n ...
... zones. The brewed type is a static refrigerator equipped with a fan (Figure 16.1b). It allows air circulation and the temperature decreases rapidly after door opening. Air temperature is more homogeneous in this case than in the static type but the energy consumption is higher due to the fan. In a n ...
Heat Exchangers Lecture
... process of heat exchange between two fluids that are at different temperatures and separated by a solid wall, which occurs in many engineering applications. Specific applications of heat exchangers may be found in space heating and air-conditioning, power production, waste heat recovery, and chemica ...
... process of heat exchange between two fluids that are at different temperatures and separated by a solid wall, which occurs in many engineering applications. Specific applications of heat exchangers may be found in space heating and air-conditioning, power production, waste heat recovery, and chemica ...
Energy-Smart Calculation of Thermal Loads in Mobile and
... calculation of thermal loads. Consecutively, the refrigeration system is selected to provide the required cooling or heating load. An alternate design approach in which the thermal loads are not only calculated as the initial design step but are also calculated in real-time is proposed in this thesi ...
... calculation of thermal loads. Consecutively, the refrigeration system is selected to provide the required cooling or heating load. An alternate design approach in which the thermal loads are not only calculated as the initial design step but are also calculated in real-time is proposed in this thesi ...
The Study of Energy Efficiency by Central Atrium in Residential
... spaces. Limitations of energy resources make necessary optimizing in various ways. By applying the principles of sustainable architecture and modern methods of architecture in addition to the optimized use of sunlight in building, creating a comfortable space for life is possible and energy resource ...
... spaces. Limitations of energy resources make necessary optimizing in various ways. By applying the principles of sustainable architecture and modern methods of architecture in addition to the optimized use of sunlight in building, creating a comfortable space for life is possible and energy resource ...
An evaluation of the nature and timing of summer human thermal
... PMV has been developed based on the average response of mid-latitude inhabitants and therefore does not take into account the factor of acclimatization when applied in a climate context different to that for which is was developed. Despite this problem the PMV is considered appropriate for the analy ...
... PMV has been developed based on the average response of mid-latitude inhabitants and therefore does not take into account the factor of acclimatization when applied in a climate context different to that for which is was developed. Despite this problem the PMV is considered appropriate for the analy ...
Passive solar building design
In passive solar building design, windows, walls, and floors are made to collect, store, and distribute solar energy in the form of heat in the winter and reject solar heat in the summer. This is called passive solar design because, unlike active solar heating systems, it does not involve the use of mechanical and electrical devices.The key to design a passive solar building is to best take advantage of the local climate performing an accurate site analysis. Elements to be considered include window placement and size, and glazing type, thermal insulation, thermal mass, and shading. Passive solar design techniques can be applied most easily to new buildings, but existing buildings can be adapted or ""retrofitted"".