Comparative Study on the Performance of Novel Electromagnetic Induction Heating and Electric Heating Turnout Snow Melting System

This paper addresses the issue of electric heating snow melting at tunnel, bridge, and culvert entrances. It explores a novel carpet-style electric heating snow melting and anti-icing system for these areas. The study analyzes the shortcomings of existing electric heating snow melting methods and proposes effective measures for improvement. To accurately assess the characteristics of current snow melting techniques, the research considers the damage caused by traditional snow melting methods to road structures and subsequent maintenance issues, while emphasizing energy-saving and environmentally friendly technologies. The snow melting process was simulated using Star-CCM+. The results show that the new carpet-style electric heating elements significantly improve snow melting efficiency. Preheating the road surface before snow accumulation greatly reduces snow retention time, enabling timely snow and ice removal. Typically, electric heating elements in snow melting systems are installed beneath the road surface at tunnel entrances. After installation, to protect the elements and ensure smoothness, a layer of cement or another suitable material is poured over them. However, these heating elements require regular inspection or replacement, which necessitates breaking up the road surface, increasing maintenance costs, and disrupting normal traffic operations. This study overcomes these challenges by providing significant convenience for installation and maintenance work, reducing costs, and minimizing the impact on traffic operations.

Mathematical and computer simulation technology of condensate oil and gas wells stimulated by electromagnetic heating

A new approach for pectin extraction: Electromagnetic induction heating

The low frequency transverse magnetic electric induction heating system uses high penetration of low frequency electromagnetic induction heat objects, which is new and high efficient. Due to the magnetic fluxing through objects transversely, it is different with other electromagnetic induction heating methods and this makes it applied more widely. And in this paper, we present the application of low frequency transverse magnetic electric induction heating system in the technique of the lock temperature on seamless line. With the analysis of heating efficiency, it also combines the theory of eddy current loss calculation with the verification results of finite element calculation and introduces the structure design of this system then. Keywords: low frequency electromagnetic induction, continuous welded rail, the lock temperature on seamless line, finite element

Temperature field characterization and optimization of temperature field distribution in pipe lining process based on electromagnetic induction heating system

Different heating has an important influence on the efficiency of the production casting. Electromagnetic induction heating technology is a new heating technology. Metallic materials is heated itself directly through the Eddy current effect with the high-frequency electric heating principle. Because of its concentrated heat, high power density and high thermal efficiency, it has more superiority than the current conventional electric furnace heating technology. In this paper, the electromagnetic induction heating system has been designed, and this heating method is applied to the casting production. The results show that the electromagnetic induction heating is very suitable for casting production, which can greatly shorten the production time and improve productivity.

When carbon composites are exposed to a transient electromagnetic field, a rapid temperature increase can be observed due to joule heating from magnetic induction. The electromagnetic induction heating and heat transfer in the composite are anisotropic and concentrated upon the carbon fiber orientation and distribution. In addition, the strength and frequency of transient electromagnetic fields have great influence on the final quality of the composite. A computational model has been developed by solving coupled Maxwell’s and heat transfer equations. The analysis accounts for the three-dimensional transient electromagnetic field and electrical conductivity of the composite material. This paper will illustrate the derived formulation and numerical solution based on finite element methods. The developed code is validated with a 2D closed-form solution. Numerical simulations of a cylinder and a flat laminated plate are conducted to illustrate the computational capability. The induction heating for composite manufacture is also discussed for current Army’s applications.

In this study, both electrical heater heating and electromagnetic induction heating combined with coolant cooling are developed to achieve a dynamic mold surface temperature control. Simulation tool was also developed by integration of both thermal and electromagnetic analysis modules of ANSYS. The capability and accuracy of simulations on the heater heating and induction heating were verified with experiments. To evaluate the feasibility and efficiency of heater heating and induction heating on the mold surface temperature control, a mold plate, roughly about an inset size of cellular phone housing, installed with five heaters and designed with four cooling channel with coolant running through, was utilized for the demo experiments varying mold surface temperature between 110 °C and 200 °C. During induction heating/cooling case, it takes 4 s to increase mold surface temperature from 110 to 200 °C and it takes another 21 s for mold surface to cool down to 110 °C. The mold plate surface temperature can be raised at about 22.5 °C/s and cooled down at 4.3 °C/s within the mentioned temperature range. Mold plate temperature distribution exhibits good uniformity as well in all stage of heating/cooling process. For heaters heating, it takes 37 s to increase mold surface temperature from 110 to 200 °C and it takes another 30 s for mold surface to cool down to 110 °C. The temperature rising rate is only about 2.4 ° C/s. Induction heating is more efficient in mold surface temperatures control than electrical heating and it does eliminate the weld line mark when applied to a tensile test mold with double gate design prior to melt injection.

From the status and history the of electromagnetic induction heating, the concept of electromagnetic induction heating, formulas and principles are briefly analyzed. There are some overviews of some examples: the furnace based on electromagnetic induction heating; the plastic processing based on electromagnetic induction heating; the temperature control system based on electromagnetic induction heating. Through these examples, the basic situation of domestic electromagnetic induction heating is summarized. Mining engineering safety detection plays a very important role in mining engineering. A mining safety detection model is designed by using electromagnetic induction heating principle for monitoring the load and the air temperature data. This detection reference model can be used for many areas for mining safety.

The main methods of railway turnout snow melting in China include artificial snow removal, wind snow removal and electric heating snow melting. Artificial snow removal costs human resources, and will cause safety hazards to railway personnel. Electric heating snow melting system mainly has the disadvantages of high energy consumption, low energy utilization rate and high failure rate in the use process. To cope with the existing technical problems of high-speed railway turnout snowmelt, a thermal cycle high-speed railway switch snowmelt system was proposed. Experiments under different influence conditions were carried out through finite element modeling. The snowmelt performance of hot fluid turnout snowmelt system was analyzed through the temperature field distribution of turnout body and the variation trend of body surface temperature.

Enhancing the catalytic H2 production performance of magnetic Ni-Fe2O3-C catalyst in biomass steam gasification using electromagnetic induction heating

An efficacious and reliable power control technique has been developed which can be used to regulate the output power of a high-frequency full bridge series resonant inverter (HF-FBSRI) in an induction heating (IH) system. In this paper, a modified buck-boost converter is presented to control the DC link/bus voltage which maintains the IH system under resonant mode and optimizes the performance of the IH system. Controlled DC link/bus voltage has been applied to this HF- FBSRI to control the average output power in the IH system. Using this aimed control technique, a wide range of output powers has been controlled and consistent performance of the IH system has been achieved. ZVS switching technique has been used to reduce the switching losses. Varying average power has been obtained at different duty cycles ranging from 0.2 to 0.8 with variable DC link voltage and it has been corroborated using PSIM environment for an IH system rated at 5500W.

Precipitation is liquid or solid water falling from clouds to the Earth’s surface. Snow is a solid precipitation in the form of ice crystals. Due to many serious problems associated with snow accumulations during winter season, the removal of snow in winter seasons, is not only a convenience, but can as well enhance safety and prevent property damage. Residential, commercial and industrial applications of snow melting have gained widespread acceptance. This paper reviews the researches on snow melting systems. The most researched and currently used snow melting systems are hydronic, electric and infrared systems. The review showed that hydronic snow melting systems is the most used system currently. This was observed as a result of the availability of choice of energy source options. However, the hydronic snow melting system has long payback period. One possible solution to compensate for this problem will be to combine snow melting systems with HVAC systems. There have been many researches on snow melting systems for pavement and bridge applications except for roof. To help minimize the collapse of buildings as a result of heavy snowfall on roofs, roof snow melting needs more attention. The paper further reviews the concept of snow building loads by comparing standard codes like ISO 4355, ASCE 7-02 and South Korea’s code for calculating snow building loads. The snow building load calculated by ISO 4355 represented higher value than others. The paper also presented a review on factors such as snow density and snow water equivalents in details and describes their importance in the aspect of snow melting system design.

The article has shown the results of experimental researches of the snow-melt on a heated platform-near building heat-pump snow-melt platform. The near-building (yard) heat pump platforms for snow melt with the area up to 10-15 m2 are a basis of the new ideology of organization of the street cleaning of Moscow from snow in the winter period which supposes the creation in the megalopolis of the «distributed snow-melt system» (DSMS) using non-traditional energy sources. The results of natural experimental researches are presented for the estimation of efficiency of application in the climatic conditions of Moscow of heat pumps in the snow-melt systems. The researches were conducted on a model sample of the near-building heat-pump platform which uses the low-potential thermal energy of atmospheric air. The conducted researches have confirmed experimentally in the natural conditions the possibility and efficiency of using of atmospheric air as a source of low-potential thermal energy for evaporation of the snow-melt heat pump systems in the climatic conditions of Moscow. The results of laboratory researches of snow-melt process on a heated horizontal platform are presented. The researches have revealed a considerable dependence of efficiency of the snow-melt process on its piling mode (form-building) and the organization of the process of its piling mode (form-building) and the organization of the process of its (snow mass) heat exchange with the surface of the heated platform. In the process of researches the effect of formation of an «ice dome» under the melting snow mass called by the fact that in case of the thickness of snow loaded on the platform more than 10 cm the water formed from the melting snow while the contact with the heating surface don’t spread on it, but soaks into the snow, wets it due to capillary effect and freezes. The formation of «ice dome» leads to a sharp increase of snow-melt period and decreases the operating efficiency of the snow-melt platform as a whole.

As a promising metalwork processing technology, electromagnetic induction heating (EMIH) method has been applied in dealing with bolted flange joints in turbomachinery. In this study, a 3-D finite element model of electromagnetic induction heating system for the bolted flange joint is established, and the specific governing equations are derived based on Maxwell’s principle. The alternately-coupled magneto-thermal analysis is carried out considering temperature-dependent material properties to obtain the temperature distribution, followed with the uncoupled thermal-mechanical analysis to acquire the axial stress and deformation in EMIH process. The magnetic induction intensity mainly concentrates at the inner wall region, attenuates seriously along the radial direction, and reduces to almost zero at the outer wall. Due to the skin effect, the heat transfers radially and axially outward, indicating a diamondlike-shaped development from the center to the surrounding region. The axial stress with and without initial pretension are also discussed respectively. Then the corresponding experiments are introduced and carried out to validate the reliability of numerical simulation results. By comparing the results of the center point of inner surface and outer surface, the numerical simulation is proved reliable with a 5∼10% reasonable deviation. Further, the induction heating process has been improved through the optimization method based on pattern search algorithm. By adopting the stepped input current density optimized in the study, the optimal thermal stress tends to be constant and the final heating time reduces by 20.5% in the safe range of stress.