Heat Flux Deutsch Translations & Examples
For calculating the heat flux density (intensity) at a certain distance from the surface of the source, it is generally required to consider not only the amount of. Englisch-Deutsch-Übersetzungen für heat flux im Online-Wörterbuch whirlwindofshadows.nl (Deutschwörterbuch). Lernen Sie die Übersetzung für 'heat flux' in LEOs Englisch ⇔ Deutsch Wörterbuch. Mit Flexionstabellen der verschiedenen Fälle und Zeiten ✓ Aussprache und. Übersetzung im Kontext von „, heat flux“ in Englisch-Deutsch von Reverso Context: heat flux. Übersetzung im Kontext von „heat flux“ in Englisch-Deutsch von Reverso Context: Change the option to calculate stresses, rotations, or heat flux.
Deutsch: Wärmeflusssensor. English: Heat flux sensor. Español: Sensor de flujo de calor. Français: Capteur de flux thermique. हिन्दी: गर्मी. Lernen Sie die Übersetzung für 'heat flux' in LEOs Englisch ⇔ Deutsch Wörterbuch. Mit Flexionstabellen der verschiedenen Fälle und Zeiten ✓ Aussprache und. Übersetzung im Kontext von „, heat flux“ in Englisch-Deutsch von Reverso Context: heat flux. Verschiebung, SpannungTemperatur oder Wärmefluss theoretisch gegen unendlich gehen. Bulgarisch Wörterbücher. Alle Rechte vorbehalten. Wärmestromdichte in die oberflächennahen Grundwasserschichten im Jahr noch Milliwatt pro Quadratmeter. Wurde von den Mitgliedstaaten eine Frist für die Beseitigung, die Lagerung, Beste Spielothek in Emminghausen finden Absatz und die Verwendung bestehender Lagervorräte von Endosulfan enthaltenden Pflanzenschutzmitteln eingeräumt, so darf sie nicht länger als zwölf Monate sein, um die Verwendung der Lagervorräte auf nur eine weitere Vegetationsperiode zu begrenzen springer springer. Beispiele für die Übersetzung Wärmeflüsse ansehen 3 Beispiele mit Übereinstimmungen. Sofern dies der Fall ist: Ich R While jedem das bedingungslose Recht, dieses Werk für jedweden Zweck zu nutzen, es sei denn, Bedingungen sind gesetzlich erforderlich.
This method is analogous to a standard way to measure an electric current, where one measures the voltage drop over a known resistor.
Usually this method is difficult to perform since the thermal resistance of the material being tested is often not known.
Accurate values for the material's thickness and thermal conductivity would be required in order to determine thermal resistance.
Using the thermal resistance, along with temperature measurements on either side of the material, heat flux can then be indirectly calculated.
These parameters do not have to be known since the heat flux sensor enables an in-situ measurement of the existing heat flux by using the Seebeck effect.
Once the heat flux sensor is calibrated it can then be used to directly measure heat flux without requiring the rarely known value of thermal resistance or thermal conductivity.
One of the tools in a scientist's or engineer's toolbox is the energy balance. Such a balance can be set up for any physical system, from chemical reactors to living organisms, and generally takes the following form.
Now, if the only way the system exchanges energy with its surroundings is through heat transfer, the heat rate can be used to calculate the energy balance, since.
In real-world applications one cannot know the exact heat flux at every point on the surface, but approximation schemes can be used to calculate the integral, for example Monte Carlo integration.
From Wikipedia, the free encyclopedia. Main article: Heat flux sensor. Refer to the article Flux for more detail. There are two ways of achieving this:.
Another factor that determines heat flux sensor behavior, is the construction of the sensor. In particular some designs have a strongly nonuniform sensitivity.
Others even exhibit a sensitivity to lateral fluxes. The sensor schematically given in the above figure would for example also be sensitive to heat flows from left to right.
This type of behavior will not cause problems as long as fluxes are uniform and in one direction only. To promote uniformity of sensitivity, a so-called sandwich construction as shown in the figure to the left can be used.
The purpose of the plates, which have a high conductivity, is to promote the transport of heat across the whole sensitive surface.
It is difficult to quantify non-uniformity and sensitivity to lateral fluxes. Some sensors are equipped with an extra electrical lead, splitting the sensor into two parts.
If during application, there is non-uniform behavior of the sensor or the flux, this will result in different outputs of the two parts.
Summarizing: The intrinsic specifications that can be attributed to heat flux sensors are thermal conductivity, total thermal resistance, heat capacity, response time, non linearity, stability, temperature dependence of sensitivity, uniformity of sensitivity and sensitivity to lateral fluxes.
For the latter two specifications, a good method for quantification is not known. This constant is also called sensitivity. The sensitivity is primarily determined by the sensor construction and operation temperatures, but also by the geometry and material properties of the object that is measured.
Therefore the sensor should be calibrated under conditions that are close to the conditions of the intended application. The calibration set-up should also be properly shielded to limit external influences.
One should avoid air gaps between layers in the test stack. These can be filled with filling materials, like toothpaste, caulk or putty.
If need be, thermally conductive gel can be used to improve contact between layers. The calibration is done by applying a controlled heat flux through the sensor.
By varying the hot and cold sides of the stack, and measuring the voltages of the heat flux sensor and temperature sensor, the correct sensitivity can be determined with:.
If the sensor is mounted onto a surface and is exposed to convection and radiation during the expected applications, the same conditions should be taken into account during calibration.
Doing measurements at different temperatures allows for determining sensitivity as a function of the temperature. While heat flux sensors are typically supplied with a sensitivity by the manufacturer, there are times and situations that call for a re-calibration of the sensor.
Especially in building walls or envelopes the heat flux sensors can not be removed after the initial installation or may be very difficult to reach.
In order to calibrate the sensor, some come with an integrated heater with specified characteristics. By applying a known voltage on and current through the heater, a controlled heat flux is provided which can be used to calculate the new sensitivity.
The interpretation of measurement results of heat flux sensors is often done assuming that the phenomenon that is studied, is quasi-static and taking place in a direction transversal to the sensor surface.
Dynamic effects and lateral fluxes are possible error sources. The assumption that conditions are quasi-static should be related to the response time of the detector.
The case that the heat flux sensor is used as a radiation detector see figure to the left will serve to illustrate the effect of changing fluxes.
This is the reason why one prefers to work with values that are integrated over a long period; during this period the sensor signal will go up and down.
The assumption is that errors due to long response times will cancel. The upgoing signal will give an error, the downgoing signal will produce an equally large error with a different sign.
This will be valid only if periods with stable heat flow prevail. In other words: sensors with low mass or small thickness.
The sensor response time equation above holds as long as the cold joints are at a constant temperature. An unexpected result shows when the temperature of the sensor changes.
From Wikipedia, the free encyclopedia. Gardon, "An instrument for the direct measurement of intense thermal radiation", Rev. Diller, Advances in Heat Transfer, Vol.
Kidd and C. Nelson, "How the Schmidt-Boelter gage really works," Proc. Retrieved Archived from the original on Geophone Hydrophone Microphone Seismometer.
Air—fuel ratio meter Blind spot monitor Crankshaft position sensor Curb feeler Defect detector Engine coolant temperature sensor Hall effect sensor MAP sensor Mass flow sensor Omniview technology Oxygen sensor Parking sensors Radar gun Speed sensor Speedometer Throttle position sensor Tire-pressure monitoring system Torque sensor Transmission fluid temperature sensor Turbine speed sensor Variable reluctance sensor Vehicle speed sensor Water sensor Wheel speed sensor.
Breathalyzer Carbon dioxide sensor Carbon monoxide detector Catalytic bead sensor Chemical field-effect transistor Electrochemical gas sensor Electrolyte—insulator—semiconductor sensor Electronic nose Fluorescent chloride sensors Holographic sensor Hydrocarbon dew point analyzer Hydrogen sensor Hydrogen sulfide sensor Infrared point sensor Ion selective electrode ISFET Microwave chemistry sensor Nitrogen oxide sensor Nondispersive infrared sensor Olfactometer Optode Oxygen sensor Pellistor pH glass electrode Potentiometric sensor Redox electrode Smoke detector Zinc oxide nanorod sensor.
Bubble chamber Cloud chamber Geiger—Müller tube Geiger counter Ionization chamber Neutron detection Particle detector Proportional counter Scintillation counter Semiconductor detector Scintillator Thermoluminescent dosimeter Wire chamber.
Accelerometer Angular rate sensor Auxanometer Capacitive displacement sensor Capacitive sensing Gravimeter Inclinometer Incremental encoder Integrated circuit piezoelectric sensor Laser rangefinder Laser surface velocimeter Lidar Linear encoder Linear variable differential transformer Liquid capacitive inclinometers Odometer Photoelectric sensor Piezoelectric accelerometer Position sensor Rotary encoder Rotary variable differential transformer Selsyn Sudden Motion Sensor Tachometer Tilt sensor Ultrasonic thickness gauge Variable reluctance sensor Velocity receiver.
Active-pixel sensor Angle—sensitive pixel Back-illuminated sensor Charge-coupled device Contact image sensor Electro-optical sensor Flame detector Image sensor Image sensor format Infrared Kinetic inductance detector LED as light sensor Light-addressable potentiometric sensor Nichols radiometer Optical fiber Photodetector Photodiode Photoelectric sensor Photoionization detector Photomultiplier Photoresistor Photoswitch Phototransistor Phototube Position sensitive device Scintillometer Shack—Hartmann wavefront sensor Single-photon avalanche diode Superconducting nanowire single-photon detector Transition edge sensor Tristimulus colorimeter Visible Light Photon Counter Wavefront sensor.
List of sensors. Categories : Sensors Meteorological instrumentation and equipment. Namespaces Article Talk. Views Read Edit View history.
Heat Flux Deutsch Beispiele aus dem Internet (nicht von der PONS Redaktion geprüft)Wärmefluss ändern. Niederländisch Wörterbücher. English heat emission heat engine heat engineering heat equation heat exchanger heat exchangers heat expansion heat flash heat flow heat flow calorimetry heat flux heat flux density heat generation plant heat generation plants heat governor heat governors heat haze heat influence zone heat insulation heat lightning heat loss In the Greek-English dictionary you will find more translations. In the thermal analysis, the boundary conditions are represented by the boundary and initial temperatures, heat power sourcesheat fluxand conditions of heat exchange between the model and environment - convection and radiation applied to the model. Portugiesisch Wörterbücher. Anhang des Abkommens wird wie folgt geändert springer Beste Spielothek in Jochling finden. The local heat flux at the inner surface of horizontal tubes in case of flow boiling may not be uniform at all, though the outer surface is heated with a uniform heat Sky Online Sport. Ich gebe dir dieses Jahr auf jeden Fall eine Geburtstagskarte cordis cordis. Verfahren nach Anspruch 3wobei der Wärmeflussparameter unter Verwendung einer sensorlosen Temperaturkontrolleinrichtung überwacht wird. Ignore - You can direct [PROD] to ignore heat flux and temperature quantities when measure results or MPA convergence criteria in excluded elements. Von-Mises-SpannungWärmefluss und Dehnungsenergie. Volume, weight, stress, strain, displacement, natural frequency, buckling load factor, fatigue usage factor, temperatureheat fluxand temperature gradient. Cs Anbieter für die Beste Spielothek in Mayoux finden Wärmefluss ansehen 58 Beispiele mit Übereinstimmungen. Ungarisch Wörterbücher. Ergebnisse: Phrases Speak like a native Useful phrases translated from English into 28 languages. These measure surface temperature, heat flux and aerodynamic pressure. Der konvektive Wärmestrom erreicht Young Living Kritik MW. Französisch Wörterbücher. Beste Spielothek in Waltersberg finden solidification of a warm flowing liquid with the convective heat transfer to Heat Flux Deutsch growing solid […] layer, has been analysed for the boundary conditions of constant temperature, constant heat flux and convective heat flux at the surface respectively. Wem machen wir denn was vor?
Note that heat flux may vary with time as well as position on a surface. In nuclear reactors , limitations of the local heat flux is of the highest importance for reactor safety.
If a hotter block of metal is put in contact with a cooler block, the intensely oscillating atoms at the edge of the hotter block gives off its kinetic energy to the less oscillating atoms at the edge of the cool block.
Heat loss through windows. A major source of heat loss from a house is through the windows. Calculate the heat flux through this window.
At this point, we know the temperatures at the surfaces of material. These temperatures are given also by conditions inside the house and outside the house.
In this case, heat flows by conduction through the glass from the higher inside temperature to the lower outside temperature.
We use the heat conduction equation:. As was written, in nuclear reactors , limitations of the l ocal heat flux is of the highest importance for reactor safety.
For pressurized water reactors and also for boiling water reactors , there are thermal-hydraulic phenomena, which cause a sudden decrease in the efficiency of heat transfer more precisely in the heat transfer coefficient.
In both types of reactors, the problem is more or less associated with departure from nucleate boiling. The nucleate boiling heat flux cannot be increased indefinitely.
Immediately after the critical heat flux has been reached, boiling become unstable and film boiling occurs. Departure from Nucleate Boiling. In case of PWRs , the critical safety issue is named DNB departure from nucleate boiling , which causes the formation of a local vapor layer , causing a dramatic reduction in heat transfer capability.
This phenomenon occurs in the subcooled or low-quality region. The behaviour of the boiling crisis depends on many flow conditions pressure, temperature, flow rate , but the boiling crisis occurs at a relatively high heat fluxes and appears to be associated with the cloud of bubbles, adjacent to the surface.
These bubbles or film of vapor reduces the amount of incoming water. Since this phenomenon deteriorates the heat transfer coefficient and the heat flux remains, heat then accumulates in the fuel rod causing dramatic rise of cladding and fuel temperature.
In case of PWRs, the critical flow is inverted annular flow , while in BWRs, the critical flow is usually annular flow.
The difference in flow regime between post-dryout flow and post-DNB flow is depicted in the figure. In PWRs at normal operation the flow is considered to be single-phase.
But a great deal of study has been performed on the nature of two-phase flow in case of transients and accidents such as the loss-of-coolant accident — LOCA or trip of RCPs , which are of importance in reactor safety and in must be proved and declared in the Safety Analysis Report SAR.
Basics of Heat Transfer. If so, give us a like in the sidebar. Main purpose of this website is to help the public to learn some interesting and important information about thermal engineering.
Thermal Engineering. Microscopic view of heat conduction. Consider, for example, heat conduction, which is one of three machanisms of heat transfer.
A heat transfer coefficient serves as the proportionality factor. Under heat conduction, the heat flux vector is proportional to and usually parallel to the temperature gradient vector.
However, in anisotropic bodies the direction of the two vectors may not coincide. In the case of simultaneous heat and mass transfer the effective heat flux may substantially, by several orders of magnitude, exceed the value due to heat conduction only.
The radiative heat flux is a flux of electromagnetic radiation and, in contrast to convection and heat conduction, may occur without any intervening medium, i.
For an idealized black body the radiation heat flux is described by Planck's law.