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In this paper, we simulate graphene on the surface of substrate, using interconnection metallization to connect merge pin schottky (MPS) power diode chip and substrate, then build a thermal model of the device, and perform the finite-element analysis with ANSYS software. In recent years, graphene has attracted a large amount of interest because of its outstanding electric conductivity, ultrahigh thermal...
In this paper, the analysis of transient thermal resistance is carried out on the basis of the regularization smoothing method and the Fourier series expansion method. These two methods are used to smooth cooling curve under the hypothetical model, and their result of smoothing and derivation are contrasted to the move average smoothing method under the actual model measured by T3ster. From theoretical...
The main objective of this paper is to describe the application of Unscented Kalman Filter (UKF) estimation algorithm to the problem of fault detection and estimation of the sensor failures in the heat exchanger systems. The proposed fault detection is based on innovation sequence implementing UKF which is used to generate residuals when a sensor fault is presented. By evaluating the generated residual,...
The Organic Rankine Cycle (ORC) has attracted a lot of interests for its ability to recover low-grade heat and the possibility to be implemented in decentralized low-capacity power plants. In this paper, a new optimal temperature control method is proposed for ORC systems with non-Gaussian disturbances which influence the quality of exhaust gas. The objective here is to control the speed of the pump...
With the continuous improvement of the electron component integrating, the packet size and weight of micro electro-devices are continue shrinking. The convenient and low-temperature processing techniques are the trend of bonding techniques. Glass frit bonding technology has advantages which include a relatively low joining temperature, and less stringent requirements for contact surface smoothness...
Organic Rankine Cycle (ORC) is suitable for recovering energy from low-grade heat sources. A moving boundary model is introduced to describe the transient phenomena of evaporator, which is an important component of ORC. Based on the partial-differential equations expressing the conservation principles of mass and energy, coupled with flue gas and tube wall energy equations, a set of ordinary-differential...
In this paper, a control-oriented model has been investigated for the evaporator in an Organic Rankine Cycle (ORC) system. Due to the nonlinearity and uncertainty existed in the evaporator, the model parameters of the evaporator have been identified by the recursive least square algorithm with forgetting factor. The improved generalized predictive control algorithm with constraints is then utilized...
In this paper, a nonlinear model identification method is applied to a thermal plant. The aim of this work is to develop a moderately complex model with interpretable structure for a complex evaporator, which is the main component of Organic Rankine Cycle System. Based on the subtractive clustering algorithm, the T-S (Takagi-Sugeno) model is derived. The clustering centers can be obtained automatically...
Organic Rankine Cycle (ORC) system has shown its superiority among different ways of recycling waste heat. Evaporator, as the key component of ORC system, has a great impact on efficiency and circulation. The dynamics of evaporator include many uncertainties because of random changes of heat sources and other factors. Traditional control strategy could not offer satisfactory results. In this paper,...
Organic light-emitting device (OLED) is regarded as the potential application for future display. However, one of the bottlenecks is the OLED package issue, which results in short term device lifetime. Currently, a new laser bonding package process is proposed. In this paper, the investigation of transient temperature field analysis for the laser bonding process is presented. Finite element model...
The grind-hardening is a new type of surface modification technology, which utilizes the dissipated grinding heat for hardening the surface layer of the workpiece. Currently, most of the researchers studying the grind-hardening have used design of experiments approach, by varying grind-hardening processes parameters with a great deal of experiments which has significant degree of uncertainty of the...
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