2002 Lyman ETFS
... a typical air-cooled heat exchanger occurs on the air-side, compact heat exchanger design is highly dependent on enhanced air-side heat transfer surfaces such as louvered fins to improve its performance for a given heat exchanger size. The heat transfer along an individual louver primarily depends o ...
... a typical air-cooled heat exchanger occurs on the air-side, compact heat exchanger design is highly dependent on enhanced air-side heat transfer surfaces such as louvered fins to improve its performance for a given heat exchanger size. The heat transfer along an individual louver primarily depends o ...
Local Heat Transfer Coefficients Measured with Temperature
... A new method to visualize local heat transfer coefficients on heat exchanger surfaces is presented and numerous experimental measurement results are shown in this thesis. The method relies on IR thermography to measure the heat transferring wall’s temperature response to an oscillating heat flux for ...
... A new method to visualize local heat transfer coefficients on heat exchanger surfaces is presented and numerous experimental measurement results are shown in this thesis. The method relies on IR thermography to measure the heat transferring wall’s temperature response to an oscillating heat flux for ...
Aalborg Universitet Cooling of the Building Structure by Night-time Ventilation Artmann, Nikolai
... European buildings. In Northern Europe, a significant passive cooling potential is likely to remain, at least for the next few decades. Because heat gains and night ventilation periods typically do not coincide in time, heat storage is essential for effective night cooling, and thus a sufficient amo ...
... European buildings. In Northern Europe, a significant passive cooling potential is likely to remain, at least for the next few decades. Because heat gains and night ventilation periods typically do not coincide in time, heat storage is essential for effective night cooling, and thus a sufficient amo ...
Thesis_Paulo_Tabares_revised
... model for green roof systems in summer conditions. The model is also verified and validated with experimental data from the “Cold Plate,” an experimental apparatus specifically designed and built to quantify heat and mass transfer processes. The “Cold Plate” apparatus represents a new kind of appara ...
... model for green roof systems in summer conditions. The model is also verified and validated with experimental data from the “Cold Plate,” an experimental apparatus specifically designed and built to quantify heat and mass transfer processes. The “Cold Plate” apparatus represents a new kind of appara ...
Residential Attic Ventilation In A Hot And Humid Climate
... The reality of the effect of natural ventilation in a residential attic cavity has been the topic of many debates and scholarly reports since the 1930’s. The purpose of ventilating an attic cavity is to prevent collection of condensate on the structural surfaces, and to create a thermal buffer betwe ...
... The reality of the effect of natural ventilation in a residential attic cavity has been the topic of many debates and scholarly reports since the 1930’s. The purpose of ventilating an attic cavity is to prevent collection of condensate on the structural surfaces, and to create a thermal buffer betwe ...
Photothermal effects in micro/nano electromechanical systems
... in the process we have explored many interesting and anomalous photo properties of BFO under visible light. The underlying concept of all these devices presented in this thesis is the extremely low mass of the devices that makes them susceptible to minute changes in added mass and heat flux. Insight ...
... in the process we have explored many interesting and anomalous photo properties of BFO under visible light. The underlying concept of all these devices presented in this thesis is the extremely low mass of the devices that makes them susceptible to minute changes in added mass and heat flux. Insight ...
Experimental Investigation of the Fluid Temperature Field and the
... An experimental study on the thermal flow behavior inside a flat-plate collector and the impact of insert devices (passive heat transfer enhancement techniques) on the thermal performance of the collector is presented. Temperature fields were obtained for different Reynolds numbers (250-650) and at ...
... An experimental study on the thermal flow behavior inside a flat-plate collector and the impact of insert devices (passive heat transfer enhancement techniques) on the thermal performance of the collector is presented. Temperature fields were obtained for different Reynolds numbers (250-650) and at ...
“Heat and Mass Transfer.” The CRC Ha - Ewp.rpi.edu
... In this equation, α is the thermal diffusivity, and q· G is the internal heat generation per unit volume. Some problems, typically steady-state, one-dimensional formulations where only the heat flux is desired, can be easily solved using Equation (3.1.1). Most conduction analyses are performed with ...
... In this equation, α is the thermal diffusivity, and q· G is the internal heat generation per unit volume. Some problems, typically steady-state, one-dimensional formulations where only the heat flux is desired, can be easily solved using Equation (3.1.1). Most conduction analyses are performed with ...
Heat Transfer
... Convection: Happens in fluids in one of two mechanisms: random molecular motion which is termed diffusion or the bulk motion of a fluid carries energy from place to place. Convection can be either forced through for example pushing the flow along the surface or natural as that which happens due to b ...
... Convection: Happens in fluids in one of two mechanisms: random molecular motion which is termed diffusion or the bulk motion of a fluid carries energy from place to place. Convection can be either forced through for example pushing the flow along the surface or natural as that which happens due to b ...
Heat production and heat flow in the mantle lithosphere, Slave
... thermal diffusivities (e.g. Katsura, 1995). Experimental data show that lattice thermal diffusivity decreases with increasing temperature, whereas radiative thermal diffusivity increases with temperature. This produces non-linear variations in total thermal diffusivity with temperature (e.g. Schatz ...
... thermal diffusivities (e.g. Katsura, 1995). Experimental data show that lattice thermal diffusivity decreases with increasing temperature, whereas radiative thermal diffusivity increases with temperature. This produces non-linear variations in total thermal diffusivity with temperature (e.g. Schatz ...
Advances in High-Power Laser Diode Packaging
... Rapid evolution of semiconductor laser technology and its declining cost during the last decades have made the adoption of high-power laser diodes more readily affordable. The continuous pursue for higher lasing power calls for better thermal management capability in the packaging design to facilita ...
... Rapid evolution of semiconductor laser technology and its declining cost during the last decades have made the adoption of high-power laser diodes more readily affordable. The continuous pursue for higher lasing power calls for better thermal management capability in the packaging design to facilita ...
cooling of electronic equipment
... of the integrated circuits (IC), where several components such as diodes, transistors, resistors, and capacitors are placed in a single chip. The number of components packed in a single chip has been increasing steadily since then at an amazing rate, as shown in Fig. 15–1. The continued miniaturizat ...
... of the integrated circuits (IC), where several components such as diodes, transistors, resistors, and capacitors are placed in a single chip. The number of components packed in a single chip has been increasing steadily since then at an amazing rate, as shown in Fig. 15–1. The continued miniaturizat ...
Energy performance of buildings — Calculation of energy use for
... ISO 13790 was prepared by Technical Committee CEN/TC 89, Thermal performance of buildings and building components, the secretariat of which is held by SIS, in cooperation with Technical Committee ISO/TC 163, Thermal performance and energy use in the built environment, Subcommittee SC 2, Calculation ...
... ISO 13790 was prepared by Technical Committee CEN/TC 89, Thermal performance of buildings and building components, the secretariat of which is held by SIS, in cooperation with Technical Committee ISO/TC 163, Thermal performance and energy use in the built environment, Subcommittee SC 2, Calculation ...
Thermal Modeling and Management of Discrete Surface
... they are measured, and how they are used. With this knowledge, the reader will be able to better describe power semiconductors and answer many common questions relating to their power handling capability. This paper will cover the following key topics. ...
... they are measured, and how they are used. With this knowledge, the reader will be able to better describe power semiconductors and answer many common questions relating to their power handling capability. This paper will cover the following key topics. ...
Abstract
... Figure 2-2: (a) Interconnections between three cells of a 3D memory device [31]; (b) Vertical interconnects between a single active device on the lowest layer and various active devices in higher layers [32] ...................18 Figure 2-3: (a) an isometric view of the 3D local model, (b) with the ...
... Figure 2-2: (a) Interconnections between three cells of a 3D memory device [31]; (b) Vertical interconnects between a single active device on the lowest layer and various active devices in higher layers [32] ...................18 Figure 2-3: (a) an isometric view of the 3D local model, (b) with the ...
Deep-Seated Oceanic Heat Flow, Heat Deficits, and Hydrothermal
... a clear understanding of each process. The purpose of this chapter is (a) to review models used to predict lithospheric or deep-seated heat flow in oceanic lithosphere, (b) to show how observations are combined with model predictions of heat flow to estimate the magnitude of sea floor hydrothermal c ...
... a clear understanding of each process. The purpose of this chapter is (a) to review models used to predict lithospheric or deep-seated heat flow in oceanic lithosphere, (b) to show how observations are combined with model predictions of heat flow to estimate the magnitude of sea floor hydrothermal c ...
Evaluating Window Insulation for Cold Climates
... can model window and wall sections. THERM 6.3 allowed for the creation of a standardreference window that was used to apply different treatments. Then the difference in the thermal performance of the window was analyzed and the condensation line was studied to see if it moved to a location that allo ...
... can model window and wall sections. THERM 6.3 allowed for the creation of a standardreference window that was used to apply different treatments. Then the difference in the thermal performance of the window was analyzed and the condensation line was studied to see if it moved to a location that allo ...
HEAT AND MASS TRANSFER Module 1: Introduction (2)
... Solids, being are much more stationary, cannot effectively transfer energy through these same mechanisms. Instead, solids may exhibit energy through vibration or rotation of the nucleus. Another important mechanism in which materials maintain energy is by shifting electrons into higher orbital ring ...
... Solids, being are much more stationary, cannot effectively transfer energy through these same mechanisms. Instead, solids may exhibit energy through vibration or rotation of the nucleus. Another important mechanism in which materials maintain energy is by shifting electrons into higher orbital ring ...
Natural Ventilation Engineering Guide
... use significantly less energy than fully mechanically ventilated, airconditioned ones (Busch,1992; Zhao and Xia 1992; and Finnegan et al., 1994). This is, in large part, because natural ventilation involves the ventilation of a space without the use of fans, but instead uses the forces of nature – w ...
... use significantly less energy than fully mechanically ventilated, airconditioned ones (Busch,1992; Zhao and Xia 1992; and Finnegan et al., 1994). This is, in large part, because natural ventilation involves the ventilation of a space without the use of fans, but instead uses the forces of nature – w ...
A Review of Thermal Rectification Observations and Models in Solid
... A Review of Thermal Rectification Observations and Models in Solid Materials N.A. Roberts, D.G. Walker∗ Department of Mechanical Engineering, Vanderbilt University, Nashville, TN USA, 37325 ...
... A Review of Thermal Rectification Observations and Models in Solid Materials N.A. Roberts, D.G. Walker∗ Department of Mechanical Engineering, Vanderbilt University, Nashville, TN USA, 37325 ...
2006 Sanders IJHMT
... wall, and a conduction guard heater assembly. The top and bottom walls bounding the flow path replicated the louver angles to simulate louver directed flow. The louvered test section had 12 louver rows, which was based on studies by Springer and Thole [14] that showed 12 rows were adequate to model an ...
... wall, and a conduction guard heater assembly. The top and bottom walls bounding the flow path replicated the louver angles to simulate louver directed flow. The louvered test section had 12 louver rows, which was based on studies by Springer and Thole [14] that showed 12 rows were adequate to model an ...
Multi-scale anisotropic heat diffusion based on normal
... multi-scale way. While the global information can be well captured by the first few eigenfunctions, for local information, much more eigenfunctions are needed, which is computationally expensive. Furthermore, since the spectrum are globally defined, they are sensitive to boundary and topology changes. ...
... multi-scale way. While the global information can be well captured by the first few eigenfunctions, for local information, much more eigenfunctions are needed, which is computationally expensive. Furthermore, since the spectrum are globally defined, they are sensitive to boundary and topology changes. ...
Heat pump
... Solar Energy There are two basic types of solar-source heat pumps systems — direct and indirect. ...
... Solar Energy There are two basic types of solar-source heat pumps systems — direct and indirect. ...
REFRACTORY ENGINEERING STRUCTURES
... To design a lining, which will have the longest lifespan in regards to the economic budget of a given country. How to communicate with the teacher: At the beginning of the semester the teacher requires entering a semestral work project on metallurical plant lining design. The design procedure will b ...
... To design a lining, which will have the longest lifespan in regards to the economic budget of a given country. How to communicate with the teacher: At the beginning of the semester the teacher requires entering a semestral work project on metallurical plant lining design. The design procedure will b ...
Apparent Latent Heat of Evaporation from Clothing
... Three custom-made outer garments were used (Fig. 3), identical in design and production, but of either impermeable (IMP), semipermeable (SEMI), or permeable (PERM) material, providing three levels of vapor permeability (Table 1). Though not essential to the testing, an attempt was made to match the ...
... Three custom-made outer garments were used (Fig. 3), identical in design and production, but of either impermeable (IMP), semipermeable (SEMI), or permeable (PERM) material, providing three levels of vapor permeability (Table 1). Though not essential to the testing, an attempt was made to match the ...
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"".