Thermal osmosis, NTNU
... Thermal osmosis Background. It has recently been found that hydrophobic membranes with pores of nanometer size will not transport water in the liquid state, but rather in the vapor state, when surrounded by water solutions at different temperatures. This opens up for a very interesting way to clean ...
... Thermal osmosis Background. It has recently been found that hydrophobic membranes with pores of nanometer size will not transport water in the liquid state, but rather in the vapor state, when surrounded by water solutions at different temperatures. This opens up for a very interesting way to clean ...
Redox - slider-chemistry-12
... The study of the relationships between chemical reactions and electricity is known as electrochemistry. There are two basic types of processes involved in this area of study: 1. Electrochemical cells – these generate electric current by using spontaneous chemical reactions. Batteries are this type o ...
... The study of the relationships between chemical reactions and electricity is known as electrochemistry. There are two basic types of processes involved in this area of study: 1. Electrochemical cells – these generate electric current by using spontaneous chemical reactions. Batteries are this type o ...
TEP(Thermoelectroic Power)
... Introduction The thermoelectricity was discovered in 1821 by Thomas Seebeck where a continuously flowing current was created when two wires of different materials were joined together and heated at one end. This is known as the Seebeck effect (Fig.1). The Seebeck effect has two main applications i.e ...
... Introduction The thermoelectricity was discovered in 1821 by Thomas Seebeck where a continuously flowing current was created when two wires of different materials were joined together and heated at one end. This is known as the Seebeck effect (Fig.1). The Seebeck effect has two main applications i.e ...
Lecture 38
... created by illuminating a junction and that is today’s topic. I-V characteristic under illumination The current in a p-n junction in the dark is I = I0 exp(eV/kT) – I0 , with the first term (forward current) Idiff being due to diffusion of carriers present in the system because of doping, and the se ...
... created by illuminating a junction and that is today’s topic. I-V characteristic under illumination The current in a p-n junction in the dark is I = I0 exp(eV/kT) – I0 , with the first term (forward current) Idiff being due to diffusion of carriers present in the system because of doping, and the se ...
Due: October 17, 2014 Problem 5.1
... An insulated rigid container is separated into two parts using a partition that is free to move and the partition allows heat transfer without any energy storage by itself. Initially 2 kg of air at 5 bar and 350 K is contained on one side of the partition while the other side contains 4 kg of carbon ...
... An insulated rigid container is separated into two parts using a partition that is free to move and the partition allows heat transfer without any energy storage by itself. Initially 2 kg of air at 5 bar and 350 K is contained on one side of the partition while the other side contains 4 kg of carbon ...
Thermometry - Texas A&M University
... K=Boltzman Constant q=electron charge JE1, JE2 = Emitter current densities ...
... K=Boltzman Constant q=electron charge JE1, JE2 = Emitter current densities ...
Capacitor Ratings Exceeding the maximum recommended stress
... Excessive voltage can cause failure either by damaging the dielectric insulating material between the capacitor plates or by causing arcing over the surface of the capacitor between the end terminations. Voltage levels sufficient to support the external breakdown phenomenon are dependent on RF frequ ...
... Excessive voltage can cause failure either by damaging the dielectric insulating material between the capacitor plates or by causing arcing over the surface of the capacitor between the end terminations. Voltage levels sufficient to support the external breakdown phenomenon are dependent on RF frequ ...
Beta Rollff & Avalanche Breakdown
... Thick depletion region causes high electric field and tremendous acceleration Very few electrons make it through depletion region with high velocity These electrons collide with atoms in the depletion region and free more electrons ...
... Thick depletion region causes high electric field and tremendous acceleration Very few electrons make it through depletion region with high velocity These electrons collide with atoms in the depletion region and free more electrons ...
Audio amplifier for portable applications NXP 3-W Class AB, BTL audio amplifier SA58631
... 9- and 12-V speakers, toys, games, and PC sound cards. It also supports operating systems that run between 2 and 18 V. The device is housed in an 8-pin HVSON that measures only 4 x 4 x 0.8 mm. The package has an exposed die-attach paddle, so it reduces junction-to-ambient thermal resistance and incr ...
... 9- and 12-V speakers, toys, games, and PC sound cards. It also supports operating systems that run between 2 and 18 V. The device is housed in an 8-pin HVSON that measures only 4 x 4 x 0.8 mm. The package has an exposed die-attach paddle, so it reduces junction-to-ambient thermal resistance and incr ...
L 04 Heat transfer
... heat power Q from one flat base having uniform temperature T 0 T1 to another flat base having uniform temperature T l T2 . It is important that there are two areas with constant temperature on the body’s surface. They serve as the “thermal terminals” in the heat conduction process (similar ...
... heat power Q from one flat base having uniform temperature T 0 T1 to another flat base having uniform temperature T l T2 . It is important that there are two areas with constant temperature on the body’s surface. They serve as the “thermal terminals” in the heat conduction process (similar ...
LEP 5.3.04 Band gap of germanium
... with r = specific recistivity, l = length of test specimen, A = cross section, I = current, U = voltage. (Dimensions of Ge-plate 2031031 mm3) On the back of the board is the heating coil, supplied by the alternating voltage output of the power unit. It is recommended that the test piece be warmed up ...
... with r = specific recistivity, l = length of test specimen, A = cross section, I = current, U = voltage. (Dimensions of Ge-plate 2031031 mm3) On the back of the board is the heating coil, supplied by the alternating voltage output of the power unit. It is recommended that the test piece be warmed up ...
Panasonic PGA26E19BA Datasheet
... – 600V enhancement mode power switch Normally-Off operation with single GaN device by Panasonic’s proprietary GIT: Gate Injection Transistor technology. – Extremely high-speed switching characteristics. – Current Collapse Free 600V and more. – Zero recovery loss characteristics. ...
... – 600V enhancement mode power switch Normally-Off operation with single GaN device by Panasonic’s proprietary GIT: Gate Injection Transistor technology. – Extremely high-speed switching characteristics. – Current Collapse Free 600V and more. – Zero recovery loss characteristics. ...
Thermal runaway
Thermal runaway refers to a situation where an increase in temperature changes the conditions in a way that causes a further increase in temperature, often leading to a destructive result. It is a kind of uncontrolled positive feedback.In other words, ""thermal runaway"" describes a process which is accelerated by increased temperature, in turn releasing energy that further increases temperature. In chemistry (and chemical engineering), this risk is associated with strongly exothermic reactions that are accelerated by temperature rise. In electrical engineering, thermal runaway is typically associated with increased current flow and power dissipation, although exothermic chemical reactions can be of concern here too. Thermal runaway can occur in civil engineering, notably when the heat released by large amounts of curing concrete is not controlled. In astrophysics, runaway nuclear fusion reactions in stars can lead to nova and several types of supernova explosions, and also occur as a less dramatic event in the normal evolution of solar mass stars, the ""helium flash"".There are also concerns regarding global warming that a global average increase of 3-4 degrees Celsius above the preindustrial baseline could lead to a further unchecked increase in surface temperatures. For example, releases of methane, a greenhouse gas more potent than CO2, from wetlands, melting permafrost and continental margin seabed clathrate deposits could be subject to positive feedback.