Nonlinear heating system of modular-trigger and platform furnaces for firing bulk materials

2021 ◽  
pp. 10-17
Author(s):  
A. I. Nizhegorodov
Keyword(s):  
Electrical Power ◽  
Central Zone ◽  
Heating System ◽  
Heat Radiation ◽  
Bulk Materials ◽  
High Quality ◽  
Heating Systems ◽  
Nonlinear Heating ◽  
Quality Material ◽  
The Impact

The design of the suspended nonlinear heating system of modular-trigger and platform furnaces for firing vermiculite and other bulk materials is considered. Previously, the design of linear heating systems did not provide homogeneous heating of thermographed materials, the material in the clutch zones suffered sufficient thermal energy. In addition, overheating of the central zone increased the frequency of the impact of the heaters themselves, which affected the reliability of the furnace. The use of a nonlinear heating system has changed this distribution to the opposite. The power of the intuboxic heater exceeded the power of the central 1,2‒1,36 times depending on the ratio of the diameters of thin and thick (diameter of 4 mm) of the heaters. At the same time, not only their electrical power increased, but the heat radiation streams, falling onto the surface of the supply, which led to an increase in the temperature of the material being processed. The obtained values of the temperature of the vermiculite grains in the fitted zones of the firing module exceed the temperature of the vermiculite in the central zone by 26 %, while it is sufficient for high-quality material intimidation. Due to the use of nonlinear heating system, temperatures were redistributed on heated surfaces in favor of relatively cold previously intuition zones: the heat picture has changed to the opposite, that is, the cold cloth zones have become relatively hot. Ill. 8. Ref. 14.

Evaluation of the Effectiveness of Heating Systems Applied in City Buses

2013 ◽  
Vol 391 ◽  
pp. 185-190
Author(s):  
Maciej Bajerlein ◽  
Jerzy Merkisz ◽  
Pawel Daszkiewicz
Keyword(s):  
Heating System ◽  
Relative Increase ◽  
Optimum Temperature ◽  
Auxiliary Heating ◽  
Vehicle Interior ◽  
Heating Systems ◽  
Temperature Distributions ◽  
Stationary Conditions ◽  
Signal Converter ◽  
The Impact

The paper presents energy saving opportunities in by analyzing two types of auxiliary heating systems. Objects of study were two heaters differing in power requirements and fuel consumption (used for water heating system). The heaters were installed in city buses of the same layout and identical convector heaters fitted for optimum temperature of the vehicle interior and the engine. Through the use of a portable device SEMTECH DS (PEMS) the exhaust emissions of CO, HC, NOx, CO2 were measured. The testing of the heaters for emissions and the testing of the temperature distribution inside the vehicle were performed in stationary conditions, determining the impact of the heating on the energy consumption of the heaters and temperature comfort inside the vehicle. The measurements were performed for each vehicle at the same ambient temperature, which was about 10°C [2, 3, 5]. So that the temperature increase inside the vehicle could be compared the tested vehicles were conditioned before the measurement. The obtained temperature distributions were determined along with a relative increase in the temperature in the vehicle interiors heated by the tested objects. The temperature measurement was performed with the use of six thermocouples utilizing a signal converter - IOTECH PERSONAL DAQ 3000.

scholarly journals The indoor climate modelling and the economic analysis regarding the energetic rehabilitation of church

2020 ◽  
Vol 1 ◽  
pp. 67-73
Author(s):  
Florin-Emilian Turcanu ◽  
Marina Verdes ◽  
Vasilica Ciocan ◽  
Catalin George Popovici ◽  
Sebastian Valeriu Hudisteanu
Keyword(s):  
18Th Century ◽  
Environmental Issues ◽  
Heating System ◽  
Primary Energy ◽  
Virgin Mary ◽  
Climate Modelling ◽  
Indoor Climate ◽  
Heating Systems ◽  
The Impact ◽  
The Church

The paper describes the behaviour of a heating system with radiators in a cult building. There has commonly used in many churches with many shortcomings. The temperature distribution in the analysed space is simulated in 2D. The simulation is based on an example, the Cathedral of the Assumption of the Virgin Mary in Jassy. The heating system with radiators simulated with the FLUENT program, the results being edifying for the factual state of the building. An important aspect is the impact of these heating systems on the works of art, the church being the 18th — century edifice. Current environmental issues lead to the continuous development of technologies used to reduce primary energy consumption. Churches are an invaluable wealth, sheltering heritage elements preserved in museums and historic buildings. Unheated churches have been used for centuries. Then, after installing one or more different heating systems, signs of rapid degradation appeared.

scholarly journals Simulation as a tool to improve wave heating in fusion plasmas

2015 ◽  
Vol 81 (5) ◽  
Author(s):  
S. Heuraux ◽  
F. da Silva ◽  
T. Ribeiro ◽  
B. Despres ◽  
M. Campos Pinto ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Heating System ◽  
Current Drive ◽  
Magnetized Plasma ◽  
Lower Hybrid ◽  
Heating Systems ◽  
Wave Heating ◽  
Drive Systems ◽  
The Impact ◽  
Resonant Heating

Firstly, a brief overview will be given on different models that are able to describe the behaviour of wave propagation as a function of specific frequency ranges. Each range corresponds to different heating systems, namely, 20–100 MHz for the ion cyclotron resonant heating, 2–20 GHz for lower-hybrid heating or current drive, and 100–250 GHz for electron cyclotron resonant heating or current drive systems. The specification of every system will be explained in detail, including the typical set of equations and the assumptions needed to describe the properties of these heating or current drive systems, as well as their specific domains of validity. In these descriptions, special attention will be paid to the boundary conditions. A review of specific physical problems associated with the wave heating systems will also be provided. The review will detail the role of simulation in answering questions that arise from experiments on magnetized plasma devices devoted to fusion. A few examples that will be covered are the impact of edge turbulence on wave propagation and its consequences on heating system performance, the effects of fast particles and ponderomotive effects, among others. A study that is more focused on radio-frequency sheath effects will also be discussed. It shows that such simulations require very sophisticated tools to gain a partial understanding of the observations undertaken in dedicated experiments. To conclude this review, an overview will be given about the requirements and progress necessary to obtain relevant predictive simulation tools able to describe the wave heating systems used in fusion devices.

The main determinants of adopting domestic biomass heating systems

2020 ◽  
Vol 11 (2) ◽  
pp. 409-428
Author(s):  
Inmaculada García-Maroto ◽  
Francisco Muñoz-Leiva ◽  
Elena Higueras-Castillo ◽  
Francisco Liébana-Cabanillas
Keyword(s):  
Perceived Control ◽  
Heating System ◽  
Individual Values ◽  
Public Authorities ◽  
Content Type ◽  
Heating Systems ◽  
Economic Aid ◽  
Managerial Implications ◽  
Main Determinants ◽  
The Impact

Purpose Understanding the antecedents of biomass heating adoption by domestic users is important for both public authorities and businesses because of the impact of this technology on energy consumption. The purpose of this study offers an overview of the predictors of biomass adoption based on the most relevant theories, gleaned from pro-environmental decision-making research. Design/methodology/approach The proposed model was tested using the partial least squares technique. The study was conducted with a sample of 528 owners of detached houses who did not use biomass technology. Findings The results showed that intention to adopt this type of heating system is determined by individual values, environmental concerns, attitudes, perceived control, personal and social norms, perceptions of the technology’s attributes, of the benefits of biomass and access to economic aid. Practical implications Companies in the biomass heating sector (manufacturers, installers, biomass producers and distributors) and public bodies should take a proactive approach toward the economic and environmental situations they currently face. Social implications Economic aid or subsidies should be made available to influence the adoption intention of potential owners; and the availability of the aid and the requirements that must be met to access, it should be publicized through advertisement campaigns. Originality/value This study includes comprehensive academic and managerial implications crucial for the introduction of domestic biomass heating systems.

scholarly journals Analysis of the Impact of Decreasing District Heating Supply Temperature on Combined Heat and Power Plant Operation

2014 ◽  
Vol 14 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Alona Bolonina ◽  
Genadijs Bolonins ◽  
Dagnija Blumberga
Keyword(s):  
Power Plant ◽  
District Heating ◽  
Heating System ◽  
Combined Heat And Power ◽  
District Heating System ◽  
Heating Systems ◽  
Plant Operation ◽  
Operation Modes ◽  
Power Plant Operation ◽  
The Impact

Abstract District heating systems are widely used to supply heat to different groups of heat consumers. The district heating system offers great opportunities for combined heat and power production. In this paper decreasing district heating supply temperature is analysed in the context of combined heat and power plant operation. A mathematical model of a CHP plant is developed using both empirical and theoretical equations. The model is used for analysis of modified CHP plant operation modes with reduced district heating supply temperature. Conclusions on the benefits of new operation modes are introduced.

scholarly journals Estimation of energy efficiency of water heating systems in terms of electricity consumption

2018 ◽  
Vol 251 ◽  
pp. 03024 ◽  
Author(s):  
Sergey Usikov
Keyword(s):  
Energy Efficiency ◽  
Electricity Consumption ◽  
Heating System ◽  
Correct Choice ◽  
Water Heating ◽  
High Quality ◽  
Heating Systems ◽  
Design Documentation ◽  
Operation Characteristics ◽  
Ventilation Systems

The article considers the creation of a regulatory framework in the field of rationing the energy efficiency of water heating systems, and gives recommendations for its creation. In heating systems, there are two main types of energy consumption: electrical and thermal. Electric consumption primarily depends on the correct choice of the pump in the system, its efficiency, as well as the design and operation characteristics of the heating system. Existing methods for assessing energy efficiency, used for ventilation systems, are not applicable for heating systems, since certain conditions must be met for high-quality exploitation. In particular, such conditions include the removal of air from the system and the provision of proportional regulation of the heat transfer of the heating devices. The article gives an example of determining the energy efficiency of a heating system depending on these conditions, and the proposed methodology and methodology applicable for ventilation systems are compared. The considered technique can be applied at carrying out of examination of the design documentation of section “Heating and ventilation”.

Innovative electrotechnological systems to provide the temperature modes of technological pipelines

2019 ◽  
Vol 2 (1) ◽  
pp. 29-39 ◽  
Author(s):  
S. G. Konesev ◽  
P. A. Khlyupin
Keyword(s):  
Induction Heating ◽  
Thermal Exposure ◽  
Heating System ◽  
The Arctic ◽  
Process Conditions ◽  
Heating Systems ◽  
Fluid Properties ◽  
Low Efficiency ◽  
Extreme North ◽  
Induction Heating System

Introduction: the systems of thermal effects on thermo-dependent, viscous and highly viscous liquids under conditions of the Arctic and the Extreme North are considered. Low efficiency and danger of heating systems based on burned hydrocarbons, heated liquids and steam are shown. Electrothermal heating systems used to maintain thermo-dependent fluids in a fluid state are considered. The evaluation of the effectiveness of the application of the most common electrothermal system — heating cables (tapes). The most effective electrothermal system based on induction technologies has been determined. Materials and methods: considered methods of thermal exposure to maintain the fluid properties of thermo-dependent fluids at low extreme temperatures. Results: presents an induction heating system and options for its implementation in the Extreme North and the Arctic. Conclusions: induction heating system to minimize loss of product quality, improve the system performance under changing process conditions, eliminate fire product, to reduce the influence of the human factor.

Dimensionamiento de un horno de fundición por inducción electromagnética y cálculo de los parámetros eléctricos

2019 ◽  
pp. 1-15
Author(s):  
Arnulfo Pérez-Pérez ◽  
Jorge Sergio Téllez-Martínez ◽  
Gregorio Hortelano-Capetillo ◽  
Jesús Israel Barraza-Fierro
Keyword(s):  
Induction Heating ◽  
Power Supply ◽  
Electromagnetic Induction ◽  
Cast Steel ◽  
Electrical Power ◽  
Heating System ◽  
Heating Time ◽  
Ferrous Alloys ◽  
Electromagnetic Induction Heating ◽  
Induction Heating System

In this work, the dimensions of a furnace for melting of ferrous alloys were determined. The furnace has an electromagnetic induction heating system. In addition, the parameters of electrical power supply such as frequency and power were calculated. A 5kg cast steel mass with a density of 7.81 kg / dm3 was proposed. This corresponds to a crucible volume of 0.641 dm3. The frequency was obtained from tables, which take into account the diameter of the crucible, and its value was 1 KHz. The energy consumption was determined with the heat required to bring the steel to the temperature of 1740 K, the energy losses through the walls, bottom and top of the crucible. This value was divided between the heating time (30 minutes) and resulted in a power of 4.5 KW. The development of the calculations shows that the induction heating is an efficient process and allows a fast melting of ferrous alloys.

Influence of temperature and humidity on the angle of repose of wood bulk materials

2016 ◽  
Author(s):  
И.В. Бачериков ◽  
Б.М. Локштанов
Keyword(s):  
Field Experiments ◽  
Bulk Material ◽  
Average Particle Size ◽  
Operating Conditions ◽  
Angle Of Repose ◽  
Wood Dust ◽  
Average Particle ◽  
Bulk Materials ◽  
Technical Literature ◽  
The Impact

При проектировании открытых и закрытых хранилищ измельченных сыпучих материалов древесных материалов, таких как щепа и опилки, большое значение имеет угол естественного откоса (статический и динамический) этих материалов. В технической литературе приводятся противоречивые сведения о величине этих углов, что приводит к ошибкам при проектировании складов. В справочных данных не учитываются условия, в которых эксплуатируются емкости для хранения сыпучих материалов, свойства и состояние этих сыпучих материалов. В свою очередь, ошибки при проектировании приводят к проблемам (зависание, сводообразование, «затопление» и т. д.) и авариям при эксплуатации бункеров и силосов на производстве. В статье представлены сведения, посвященные влиянию влажности и температуры на угол естественного откоса сыпучих материалов. На основании лабораторных и натурных экспериментов, проведенных с помощью специально разработанных методик и установок, была скорректирована формула для определения углов естественного откоса (статического и динамического) для измельченных древесных материалов в зависимости от их фракционного и породного состава, влажности (абсолютной и относительной) и температуры. При помощи скорректированной формулы можно определить угол естественного откоса древесных сыпучих материалов со среднегеометрическим размером частицы от 0,5 мм до 15 мм (от древесной пыли до технологической щепы) в различных производственных условиях. Статья может быть полезна проектировщикам при расчете угла наклона граней выпускающей воронки бункеров и силосов предприятий лесной отрасли и целлюлозо-бумажной промышленности. In the design of open and closed storage warehouses chopped wood materials for bulk materials such as wood chips and sawdust, great importance has an angle of repose (static and dynamic) of these materials. In the technical literature are conflicting reports about the magnitude of these angles, which leads to errors in the design of warehouses. In the referencesdoes not take into account the conditions under which operated capacities for storage of bulk materials, and properties and condition of the bulk material. The design errors lead to problems (hanging, arching, «flooding», etc.) and accidents in the operation of hoppers and silos at the mills. The article provides information on the impact of humidity and temperature on the angle of repose of granular materials. On the basis of laboratory and field experiments, conducted with the help of specially developed techniques and facilities has been adjusted formula for determining the angle of repose (static and dynamic) for the shredded wood materials depending on their fractional and species composition, humidity (absolute and relative) and temperature. It is possible, by using the corrected formula, to determine the angle of repose of loose wood materials with average particle size of from 0.5 mm to 15 mm (wood dust to pulpchips) in various operating conditions. The article can be helpful to designers in the calculation of the angle of inclination of the funnel faces produces bunkers and silos forest industries and pulp and paper industry.

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