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The Thermal InfraRed Sensor (TIRS), an infrared (IR) radiometer developed at Centro de Astrobiología, is one the sensors that compose the Mars Environmental Dynamics Analyzer (MEDA) onboard NASA's Mars 2020 mission. It will measure the net thermal infrared radiation, reflected solar radiation at the surface, atmosphere temperature and surface skin brightness temperature using five different channels...
Air filter diagnostics/prognostics are needed to determine the condition of the intake air filter in internal combustion engines and to indicate the need for maintenance. Monitoring air filter health helps saving on operational costs, maintaining optimal fuel economy, and planning for service/maintenance before failure. In the present paper, we propose an air filter diagnostics/prognostics method...
This paper addresses the concrete mode of using the energy of the microwave field in the drying process of wooden sticks used in the food industry. For the numerical analysis of the microwave field we used the COMSOL Multiphysics numerical modelling programme. The experimental measurements were performed using a multimode applicator. The aim of this paper is to present a study on the microwave field...
The continuously stirred tank reactor (CSTR) may exhibit various nonlinear effects, for example, multi-stability or sustained oscillations. This makes the CSTR one of the most difficult industrial units for control and the system instability or thermal runaway indicate that the safety issues must also be taken into account. In comparison to the real reactor, a hybrid system is safe and less expensive...
In today's era of renewable energy, hydrogen fueled proton exchange membrane (PEM) fuel cells are considered as an important source of clean energy. As the technology is emerging fast, many universities and colleges have adopted fuel cells in their educational program. In this paper, we will present the modeling and control of the fuel cell pilot plant present in Clean Energy Trainer, which is used...
This paper proposes a comprehensive modeling and parameters extraction method of solar photovoltaic module based on the Particle Swarm Optimization algorithm. The characteristic curves of photovoltaic panel are obtained by using only the information provided by the manufacturer data-sheet, avoiding the need to carry out experimental data. The performance and the accuracy of the proposed method are...
In this paper, a new set of algorithms has been developed to detect low charge fault for single compressor non-critically charged refrigeration system for both frozen and perishable goods. A mix of field units' data and experimental data were used to build the detection algorithms. Multiple detection algorithms were devised based on the operation modes. The system operates in multiple distinctive...
The work deals with upgrading of the temperature mode control in residential accommodation with electric heating due to transition from simple control systems to adaptive self-adjusting systems. Essential shortcomings of widespread on-off relays and other types of regulators are noted. The thermal balance of accommodation at the air heating stage from the initial to the set value is considered. The...
Materials used for high-voltage electrical insulation must fulfill particular mechanical, thermal, and dielectric requirements, therefore epoxy based composites seem to be perfect ones and are broadly used for that purpose. What is very important, the properties of the final product are strongly dependent on appropriate manufacturing process with lack of material failures, as too large shrinkage,...
This paper is dedicated to vortex flow measurements. The flowmeters based on the use of vortex formation behind the shedding bar play an important role in the global flow measurement industry. The authors have conducted the study of dependency of the Strouhal number in a wide measurement range at different fluid temperatures. It was found that the value of the Strouhal number was not constant throughout...
The importance of the mechanical behavior of electronic packages starts at the beginning of the package assembly process and continues through performance testing procedures at different levels. Predicting an electronic package's mechanical performance by simulation is an ongoing challenge and pursuit of both industry and academia. To achieve this goal, advanced simulation or analyses should have...
This study focuses on the understanding of moisture diffusion physics under use conditions (UC) and its impact on definition of qualification requirements. It uses computational modeling and detailed measurements of UC to challenge some long held assumptions used in moisture risk assessments. It introduces the quantity called "Stable Wetness" to account for moisture amount present in the...
Multilayer piezoelectric actuators, typically used in nano-positioning applications under high electrical field excitation, are affected by hysteresis, which limits their applications in terms of open-loop positioning and stability in closed-loop systems. In this paper, a reduced Preisach model superimposed to a linear response is applied. With only 5 parameters, the model shows a good match to experimental...
The aim of this paper was to elaborate novel two-dimensional behavioral temperature models for thin-film resistors fabricated onto FR-4 laminate. Investigated resistors were made of Ni-P alloy with two different thicknesses (0.1 μm or 0.05 μm) and the same different sheet resistances (100 ohm/sq or 250 ohm/sq). A large number of R(l, w, T) characteristics was measured automatically in cryostat system...
This study was aimed at quantifying critically relevant topics about the influence of intermetallic compounds (IMC) within power electronics reliability such as the influence of soldering profile on the growth rate of IMC in large area solder joints, estimation of IMC thickness during non-isothermal ageing and the impact of IMC thickness on reliability. To this end, test samples were soldered using...
Interior permanent magnet synchronous machine drives have widespread applications in electric traction systems and various industrial processes. However, prolonged exposure to high temperatures while operating can demagnetize the permanent magnets to the point of irreversible demagnetization. In addition, direct measurements with infrared sensors or contact-type sensors with wireless communication...
The accurate measurement of wet steam has great significance for energy conservation and sufficient utilization. However, subject to the complex flow characteristics of vapor steam and discrete droplets, there are many problems in wet steam metrology. A dual-parameter model combining V-cone and vortex flowmeters was proposed to calculate mass flowrate of wet steam. The vapor mass flowrate is obtained...
Quantitative analysis of gas mixtures for detecting low concentrations of gases like acetone or ethanol in exhaled breath is of high interest in medical diagnostics and patient monitoring. In this purpose, we intend to use source separation methods for separating the gas sources measured with MOX sensors. These unsupervised methods require a relevant mathematical model of responses of MOX sensors...
At present, the research of temperature control algorithm is based on the traditional PID and the improved PID algorithm based on the traditional PID. But in the industry, there are some deficiencies. In order to solve the problem of high overshoot and slow calculation speed in the design of temperature control system. This paper presents a design of temperature control system of adaptive control...
This paper presents a novel photo-electro-thermal (PET) model that completely describes the interactions of photon-electricity, photon-heat, and heat-electricity for commercial PV modules. Based on the PV thermal and electrical characteristics available from the manufacturer datasheet, the proposed PET model is implemented on the Simulink environment and verified under the standard test condition...
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