HEAT TRANSFER FROM A PRESSURIZED GAS TO A TEMPERATURE SENSOR

1970 ◽  
Author(s):  
Thomas Weast ◽  
Louis Burmeister
Keyword(s):  
Heat Transfer ◽  
Temperature Sensor

Research on External and Internal Induction Heating Effectiveness of Injection Molds by Means of Thermovision Measurements

2014 ◽  
Author(s):  
Krzysztof Mrozek ◽  
Roman Staniek ◽  
Marek Szostak
Keyword(s):  
Heat Transfer ◽  
Induction Heating ◽  
Temperature Sensor ◽  
Eddy Currents ◽  
Induction Generator ◽  
Electronic Industry ◽  
Heated Area ◽  
Grooved Surface ◽  
Thin Walled ◽  
Internal Induction

The aim of this work is to compare the effectiveness of two induction heating methods of injection molds by means of thermovision measurement. The problem of selecting external or internal induction heating for thin-walled moldings used in electrical and electronic industry is taken into consideration. At first, the boundary conditions were defined. Then a group of three moldings with different defects were selected. The defects that have been taken to remove by means of induction heating are: weld lines, breaking hinges, air traps and diesel effect. In order to compare the methods of heating two models were created. The first one was made as a block of steel with milled grooves with a width of 2mm and a depth varying from 1 to 12mm. The second model consisted of two parts, one being placed in the second. The research stand consisted of prepared models, induction generator with power of 10kW, specially shaped inductor, thermovision camera and temperature sensor of PT100 type as a reference. First, the surface with milled grooves was heated in four different sectors (because of the shape of inductor) in time of 2s. The area of low-depth grooves heated up to 154°C while the surface with 12 mm grooves heated up to 120°C. It comes from eddy currents flowing. This phenomenon shows that effectiveness of external heating of grooved surface decreases with increasing of grooves depth. In the second case the cavity insert was heated as a coil inside the inductor which was located inside the mold. The measured value was the time of heat transfer from heated area to the forming surface in three configurations.

Experimental and Numerical Investigation of Heat Transfer Through Porcine Heart and Esophageal Tissue

2021 ◽  
Author(s):  
Karcher Morris ◽  
Shengfan Hu ◽  
Matthew Kohanfars ◽  
Frank E. Talke
Keyword(s):  
Heat Transfer ◽  
Atrial Fibrillation ◽  
Experimental Study ◽  
Temperature Sensor ◽  
Sensor Array ◽  
Thermal Damage ◽  
Porcine Heart ◽  
Esophageal Tissue ◽  
Close Proximity ◽  
Temperature Heat

Abstract Atrial fibrillation is a heart condition commonly treated by cardiac ablation procedures. Since the esophagus is positioned in close proximity to the heart, esophageal thermal damage can occur during ablation. In this study, we investigate the temperature rise on the inner esophagus surface using a 2D temperature sensor array. An experimental study was performed to measure temperature by the sensor array placed on inner porcine esophagus tissue as a constant temperature heat source is applied to the inner porcine atrial tissue. A numerical model was developed to complement the experimental study.

Evaluation of Heat Transfer Kinetics on Layers of Air-Rich Soft Materials in Their Natural State

2018 ◽  
Author(s):  
Hiroki Kaneko ◽  
Atsushi Sakuma
Keyword(s):  
Heat Transfer ◽  
Surface Temperature ◽  
Temperature Sensor ◽  
Soft Materials ◽  
Multilayered Structure ◽  
Radiation Temperature ◽  
Natural State ◽  
Hot Plate ◽  
Number Of Layers ◽  
Kinetics Of

Air-rich soft materials are widely used in textile products, such as clothes and towels, because they exhibit good heat-retaining properties. Quantification of the heat-retaining properties of materials is necessary for product design engineering. Here, the behavior of heat transfer in the layer structure of the material is evaluated to formulate its kinetics. Such evaluation can address the barriers to appropriate design. The heat transfer kinetics of the multilayered structure of the materials are evaluated by assessing the surface temperature of the outer layers. The evaluation equation for kinetics is formulated by applying the fundamental relationship of heat transfer, which is represented by thermal conductivity and the heat transfer coefficient. In the experimental evaluation, a simple wind tunnel was developed using a blower, hot plate, and digital radiation temperature sensor. The temperature of the hot plate was set at three levels. In the evaluation of surface temperature, the quantity of infrared ray was measured using the digital radiation temperature sensor, because it could be used without mechanically influencing the specimen. The surface temperature of the materials was measured by changing the number of layers from one to eight. In the evaluation of heat transfer kinetics, some properties of the conductivity and the transfer were identified by the formulated relationship for the kinetics of the layered structure and the numerical technique of inverse analysis. It was found that the heat conductivity of the material and heat conductivities between the layers can be identified by the examination of surface temperature variation caused by the change in the number of layers. Then, the crush effect of air-rich structures can be assessed by compressing the material and then analyzing the behavior change in heat transfer caused by the crush. The difference between the observed results and those obtained without the crush of air-rich structure was significant. Thus, we concluded that the physical properties of heat transfer in a multilayered structure of air-rich soft materials can be identified using the surface temperature change in the material resulting from the number of layers. Therefore, it is important to measure its behavior without the crush of the air-rich structure to evaluate the most natural state of the material appropriately.

Complex Approach to the Proposal for Resistance Temperature Sensor for Media Temperature

2015 ◽  
Vol 816 ◽  
pp. 150-153
Author(s):  
Ján Vavro ◽  
Ján Vavro ◽  
Petra Kováčiková ◽  
Radka Bezdedová
Keyword(s):  
Heat Transfer ◽  
Finite Element Method ◽  
Finite Element ◽  
Solid Body ◽  
Temperature Sensor ◽  
Complex Approach ◽  
The Media ◽  
The Given ◽  
Program Software ◽  
Element Method

The given paper is closely connected with the complex proposal relating to the resistance temperature sensor for media temperature. The mentioned proposal is based on the analysis and simulation of loading with the reference to the resistance temperature sensor during the media flow in the pipeline while the heat transfer in solid body and media occurs simultaneously. The simulation of the loading was carried out on the basis of finite element method (FEM) using Cosmos Motion 2.86 program software. During the given investigation, the different media temperatures as well as different velocities or rates of media flow were taken into account.

scholarly journals Heat Transfer Lab Kit using Temperature Sensor based Arduino TM for Educational Purpose

2017 ◽  
Vol 170 ◽  
pp. 536-540 ◽  
Author(s):  
Eka Cahya Prima ◽  
Saeful Karim ◽  
Setiya Utari ◽  
Rahmat Ramdani ◽  
Eneng Riska Rahayu Putri ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Temperature Sensor ◽  
Educational Purpose
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