نتایج جستجو برای: peltier effect
تعداد نتایج: 1642125 فیلتر نتایج به سال:
The article describes the possibilities of using Peltier cells as an energy source to power the telemetry units, which are used in large-scale monitoring systems as central units, ensuring the collection of data from sensors, processing, and sending to the database server. The article describes the various experiments that were carried out, their progress and results. Based on experiments evalu...
A laboratory-scale temperature system for Control and Automation courses is presented. The system is a coupled two-input two-output process which use peltier modules for temperature control. This paper describes the laboratory-scale system in details. A linear dynamic model of the thermoelectric cooler including the heat sink and the cooling-load heat exchanger is developed and experiments are ...
This paper explores the application of thermoelectric cooler/heater (TEC) modules (Peltier heat pumps devices) to control core and winding temperatures, aiming reduce effects thermal cycling moisture issues that affect life electrical machines. Electrical windings in a motor will fail for variety reasons, major contributor adverse motor’s is humidity. Due cycling, air containing drawn into thro...
Systems designed to significantly reduce equipment cost and size for neurophysiological studies and hybrid biosensor applications were developed. Custom integrated circuits, each providing eighteen channels of amplification and filtering were designed, fabricated and tested. Planar arrays of iridium microelectrodes were fabricated and packaged in a standard 40 pin dual-in-line package for cultu...
The work presented here is a study of thermally enhanced injection in light-emitting diodes (LEDs). This effect, which we refer to as "thermal pumping", results from Peltier energy exchange from the lattice to charge carriers when current is injected into an LED. For an applied voltage V such that qV < (hw), where q is the electron charge and (hw) is the average emitted photon energy, thermal p...
Machines are only Carnot efficient if they are reversible, but then their power output is vanishingly small. Here we ask, what is the maximum efficiency of an irreversible device with finite power output? We use a nonlinear scattering theory to answer this question for thermoelectric quantum systems, heat engines or refrigerators consisting of nanostructures or molecules that exhibit a Peltier ...
An electric current from a ferromagnet into a nonmagnetic material can induce a spin-dependent electron temperature. Here, it is shown that this spin heat accumulation, when created by tunneling from a ferromagnet, produces a non-negligible voltage signal that is comparable to that due to the coexisting electrical spin accumulation and can give a different Hanle spin precession signature. The e...
By inducing controlled changes in the electrophysiologic properties of the whole heart, numerous studies have analysed the onset and maintenance mechanisms of ventricular arrhythmias. In this contribution a new method that cause local heterogeneities in the cardiac tissue is explained. A specific device, based on the Peltier effect, has been developed to quantify, in an experimental model (Lang...
was awarded the Nobel prize in Chemistry along with Michael Smith for his work on PCR2. The PCR is commonly carried out in a reaction volume of 10-200 μl in small reaction tubes (0.2-0.5 ml volumes) in a thermal cycler. The thermal cycler heats and cools the reaction tubes to achieve the temperatures required at each step of the reaction. Many modern thermal cyclers make use of the Peltier effe...
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