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Since the higher function and miniaturized electronic devices need to consume more energy, the heat flux of local area in device will be more than 1000 w/cm2 to cause the concern of heat transfer. This paper studied the heat transfer of air-water two-phase flow in microgap with non-boiling conditions. When the flow rate of DI water was fixed (32∼196 ml/min), Nusselt number increased higher with the...
Cardiac arrest (CA) is one of the leading causes of mortality and morbidity in the world. Fast, reversible and controllable pharmaceutical-induced hypothermia (PIH) is strongly desired to treat ischemia-reperfusion brain injury. Dihydrocapsaicin (DHC), an agonist of transient receptor potential vanilloid type 1 cation channel (TRPV1), is an emerging candidate for PIH. Its capability to lower body...
A non-invasive, active neuro-vascular assessment system was developed using a modified temperature-controlled glove and feedback techniques. The glove incorporates local heating and cooling of the hand using multi-point skin temperature measurements as feedback, and thereby induces local and central mechanisms involved in thermoregulation. Electrocardiogram (ECG), photoplethysmogram (PPG) and non-invasive...
The sense of prosthesis embodiment, or the feeling that the device has been incorporated into a user's body image, may be enhanced by emerging technology such as invasive electrical stimulation for sensory feedback. In turn, prosthesis embodiment may be linked to increased prosthesis use and improved functional outcomes. We describe the development of a tool to assay artificial hand embodiment in...
Controlled Start Transmissions can be described as a mechanical transmission combined with a hydraulic clutch for controlled torque output. CSTs are commonly used to start up heavy loads for example mining conveyors and produces heat during startup. Models for CST clutch heat generation together with thermal behavior has been developed and investigated. This includes a temperature model together with...
Confining treatment to the tumor to improve therapeutic outcome and reduce toxicity, is a hot issue in cancer research. Hyperthermia is recognized as a strong sensitizer for radiotherapy and chemotherapy enhancing tumor control without increasing toxicity. Today's electromagnetic hyperthermia systems heat large tissue volumes with limited ability to selectively heat the tumor. Fortunately, tremendous...
The electrocaloric effect (ECE) of multilayer ceramic capacitor (MLCC) of Y5V type was directly measured via a differential scanning calorimetry (DSC) method and a reference resistor was used to calibrate the heat flow due to the heat dissipation. The results are compared with those calculated from Maxwell relations by using the polarization data obtained from the polarization - electric field hysteresis...
Logging tools are wildly used in deeper oil and gas wells in which the geothermal temperature can be as high as 200 ¼C. However, a majority of the downhole electronic components can only withstand ambient temperature not exceeding 120 ¼C. Therefore, an effective thermal management system is necessary for logging tools. In this paper, a thermal management based on the combination of the vacuum flask...
This paper presents an original multiple-input multiple-output laboratory stand for process control education developed in the Institute of Control and Computation Engineering, Warsaw University of Technology. It may be used as a benchmark process to test control algorithms, including fault tolerant ones, and to compare effectiveness of model identification algorithms. Mechanical and electronic details...
Based on the thermal properties of quantum dots, a novel method for bearing cage temperature measurement is proposed in this paper. Firstly, the synthesis of quantum dots is briefly introduced, and the composited film by DDA polyelectrolyte-CdTe quantum dots for temperature sensor is prepared according to the layer-by-layer self-assembly method. Then the linear reversible change of CdTe quantum dots...
In this study, we present the characterization and the modeling of transparent silver nanowire thin-film heaters in terms of their transient thermal response when subjected to Joule heating and their electrical properties. The electrical properties, which showed a conductance-temperature dependence that is reduced down to a factor of 2 compared to the value for bulk silver, could be modeled accurately...
We present a control system for wavelength stabilization of silicon MRR used to improve ER in a four-channel DML-based transmitter. The ER enhancement is achieved with automatic control and the sensitivity of the system is better than −28 dBm at 10−3 BER after 40-km transmission.
Predictive control strategies for building heating and cooling systems have been proposed as an energy efficient alternative to traditional strategies. The performance of such strategies is highly dependent on the underlying system models used. In an effective strategy, these models used are required to be accurate enough for informative predictions to be made yet simple enough to be used within a...
We report on a precise in situ procedure to calibrate the heat flux sensor of a near-field scanning thermal microscope [1, 2]. This microscope is based on a scanning tunneling microscope which is equipped with a sub-micro sized, coaxial thermocouple with a tip apex radius of about 30 nm. The microscope is able to measure lateral changes in heat transfer with a resolution of about 7nm [3, 4]. The calibration...
At present, there is a common usage of adhering temperature recorder like black box to the surface of steel billet in the iron and steel Industry. After the heating process we can get the data and then analyze the heating process and establish a heating model of it. However, it's not easy to upmost the controlling in the practical application, this article use the full view real-time monitoring technology...
In this study, the phenomena of multiple droplet impingements are investigated and observed experimentally. A high-speed camera was used to capture sequential images of multiple droplet impingements. Image processing technique was used to analyze the images from a high-speed camera. The effect of droplet frequency and Weber number to spreading ratio are investigated. The result of this study shows...
Air temperature is an important factor related to evaporation process of the solvent during the production of nanofibers using rotary forcespinning (RFS). An air temperature regulation system was developed to maintain the air temperature of the RFS chamber with a volume of 63 dm3. It consisted of an AC (alternating current) heater (220V, 50Hz, 350W), a temperature and humidity sensor SHT11 (DT-SENSE),...
Pasteurization engine uses a heat exchanger to heat the milk up to 71.6 °C. Therefore, the suitable type of controller for pasteurization process must be obtained. In this paper, there are five types of controller to be compared. These controllers are a PID controller tuning Ziegler Nichols, PID tuning Cohen Coon, Cascade PID, Fuzzy Inference System and Adapative Neuro Fuzzy Inference System (ANFIS)...
The performance of vector nozzle is evaluated by the aero-engine vector nozzle measuring platform. The airflow temperature of the vector nozzle is as high as 1100K in the thermal test, which is not conducive to measure the thrust vector. There are several factors that affect the vector thrust measurement. The expansion of the heated vector simulation device generates tensile force on the floating...
Temperature control has been widely applied in many fields, such as medical product transportation, living tissue storage and blood transfusion. Therefore, it is very important to design a vehicle-mounted medical temperature control system. The priority of the developed system must meet stability and accuracy requirement. Based on the fuzzy PID control, a system design solution was proposed in this...
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