Thermal control

Xem 1-20 trên 97 kết quả Thermal control
  • Ebook Analytical heat transfer has contents: Introduction, mechanisms of heat transfer, zero-dimensional (lumped) analysis, thermal control, physics of heat transfer, one dimensional conduction, one-dimensional forced convection, one-dimensional natural convection, multidimensional conduction,...and other contents.

    pdf309p bautroibinhyen20 06-03-2017 8 1   Download

  • Introduction to Control Systems, Mathematical Modeling of Control Systems, Mathematical Modeling of Mechanical Systems and Electrical Systems, Mathematical Modeling of Fluid Systems and Thermal Systems, Transient and Steady-State Response Analyses,... as the main contents of the book "Modern Control Engineering". Invite you to consult.

    pdf905p thuanh925 16-03-2016 64 27   Download

  • Thermal Analysis is a well-established set of techniques for obtaining qualitative and quantitative information about the effects of various heat treatments on materials of all kinds, including new chemical compounds, plastics, ceramics, alloys, construction materials, minerals, foods and medicines. Heating is performed under strictly controlled conditions and can reveal changes in structure and other important properties of the material being studied. Such studies are of great practical importance in the use of materials....

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  • (BQ) Part 1 book "Introduction to thermal systems engineering - Thermodynamics, fluid mechanics, and heat transfer" has contents: What is thermal systems engineering, evaluating proper ties, getting started in thermodynamics - introductory concepts and definitions; control volume analysis using energy; using energy and tontrol volume analysis using energy... and other contents.

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  • Effect of wollastonite nanofibers on the improvement of thermal conductivity coefficient of Medium-Density Fiberboard (MDF) was studied here to find a possible solution to decrease hot-press time as a bottle-neck during composite production. Nanowollastonite was applied at 10%, based on the dry weight of wood fibers. Density of the control MDF boards was 0.66 g/cm3. Thermal conductivity coefficient was measured using an apparatus based on Fourier’s Law for heat conduction.

    pdf5p thanhtoyz 17-10-2015 13 2   Download

  • (BQ) Part 1 book "The CRC handbook of thermal engineering" has contents: Engineering thermodynamics (fundamentals, control volume applications, property relations and data, vapor and gas power cycles, guidelines for improving thermodynamic effectiveness, economic analysis of thermal systems,...), fluid mechanics, heat and mass transfer.

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  • In this paper, physico-chemical and mineralogical properties of fly ash from Pha Lai, Mong Duong and Ninh Binh thermal power stations were studied for ultilization to improve soil properties. Results shows that the properties of fly ash depend on the nature of parent coal, conditions of combustion, type of emission control devices, and storage and handling methods.

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  • In this work, we report on the controlled synthesis of ZnS microstructures with high purity on Au-coated silicon substrates by thermal evaporation of ZnS powder in Ar gas ambient at atmospheric pressure. The growth mechanism is confirmed as a typical vapor–liquid–solid (VLS) process. The prepared ZnS microstructures have wurtzite (hexagonal) structures. The catalytically grown ZnS microstructures, including microwires and microbelts, are tens of micrometers in length.

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  • This paper proposes a new control strategy for improving the performance of the superheated steam temperature control system in thermal power plants. Based on the analysis of the limitations of the static feedforward compensators (SFC) for temperature and boiler load disturbances in the existing control system of the auxiliary boiler in Dung Quat refinery, two adaptive dynamic feedforward compensators (ADFC) for temperature and boiler load disturbances were proposed to replace the SFCs.

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  • Long-time protection: The long-time protection function protects cables (phases and neutral) against overloads. This function is based on true rms measurements. Thermal memory: The thermal memory continuously accounts for the amount of heat in the cables, both before and after tripping, whatever the value of the current (presence of an overload or not). The thermal memory optimises the long-time protection function of the circuit breaker by taking into account the temperature rise in the cables. The thermal memory assumes a cable cooling time of approximately 15 minutes....

    pdf31p nmtinh 10-11-2010 241 66   Download

  • Spirax Sarco recirculating feedwater spray systems type RFS are designed to provide additional flash steam condensing capacity on boiler feedtank applications. When the condensate return flowrate is high and the cold make-up flowrate is intermittent it is likely that valuable flash steam will be lost through the vent. To ensure that this flash steam is condensed it is often worthwhile to take feedwater from a relatively cool part of the feedtank and pump it to a spray nozzle.

    pdf130p chaucogido 30-01-2010 132 63   Download

  • This book is concerned with the subject of Wind Energy, as a source of clean and renewable and free for all. The need for this type of book is very well documented, the current consumption of energy is unsustainable and humans have to change their habits and or utilise this source, but there is so much work before we can rely completely on renewable energy. This book aims to describe the fundamentals of wind energy and the pertinent parameters that control the amount of energy available from a given wind turbine. Coal fuelled the industrial revolution in the 18th and 19th century.

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  • Electrical machines are almost entirely used in producing electricity, and there are very few electricity-producing processes where rotating machines are not used. In such processes, at least auxiliary motors are usually needed. In distributed energy systems, new machine types play a considerable role: for instance, the era of permanent magnet machines has now commenced. About half of all electricity produced globally is used in electric motors, and the share of accurately controlled motor drives applications is increasing.

    pdf531p nguyenthai_thinh 21-03-2013 57 25   Download

  • Thermal processing of foods in one form or the other has been in place since the 1900s. Although the fundamental principles remain the same, there have been numerous improvements in the control and automation of thermal processes. The various chapters in this book provide an insight into the details of the control and automation processes and details involved for different thermal processes.

    pdf220p aries23 29-09-2012 50 15   Download

  • Bearings (both plain and rolling element) are used as important supporting elements for locating rotating components and confining their motion in desired direction. In order to ensure their operational reliability and desired life, these need to be properly designed/selected for an application more so because of ever increasing operational speeds. This requires the careful performance evaluation of different types of bearings considering aspects such as thermal stability, lubrication, contaminants in lubricants and controlling mechanism etc....

    pdf248p cucdai_1 19-10-2012 41 14   Download

  • This book is concerned with the subject of Wind Energy, as a source of clean and renewable and free for all. The need for this type of book is very well documented, the current consumption of energy is unsustainable and humans have to change their habits and or utilise this source, but there is so much work before we can rely completely on renewable energy. This book aims to describe the fundamentals of wind energy and the pertinent parameters that control the amount of energy available from a given wind turbine....

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  • Physical properties of metals, ceramics, and polymers, such as ductility, thermal expansion, heat capacity, elastic modulus, electrical conductivity, and dielectric and magnetic properties, are a direct result of the structure and bonding of the atoms and ions in the material. An understanding of the origin of the differences in these properties is of great engineering importance.

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  • CHAPTER 54 COOLING ELECTRONIC EQUIPMENT Allan Kraus Allan D. Kraus Associates Aurora, Ohio 54.1 THERMAL MODELING 54. 1 . 1 Introduction 54. 1 .2 Conduction Heat Transfer 54.1.3 Convective Heat Transfer 54.1.4 Radiative Heat Transfer 54.1.5 Chip Module Thermal Resistances HEAT-TRANSFER CORRELATIONS FOR ELECTRONIC EQUIPMENT COOLING 54.2.1 Natural Convection in Confined Spaces 1649 1 649 54.3 1649 1652 1655 1656 54.2.2 Forced Convection 1662 1667 1672 1672 1674 THERMAL CONTROL TECHNIQUES 54.3.1 Extended Surface and Heat Sinks 54.3.2 The Cold Plate 54.3.3 Thermoelectric Coolers 54.

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  • The accuracy of a machined part depends on the precision motion delivered by a machine tool under static, dynamic, and thermal loads. The accuracy is evaluated by measuring the discrepancy between the desired part dimensions identified on a part drawing and the actual part achieved after machining operations.

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  • Hexabromobenzene (HBB) has been used as a flame retardant in polymers, plastics, textiles, wood and paper. Its primary uses have been reported in the plastics, paper and electrical industries (Bruchajzer et al., 2004). U.S. production/import volume was listed as 10,000- 500,000 pounds for 1998, but no information is available beyond that time (U.S. EPA, 2002). In addition to its use as a flame retardant, HBB is a thermal decomposition product of octa- and decaBDEs and hexabromobiphenyl (as cited in Bruchajzer et al., 2004).

    pdf9p cao_can 02-01-2013 34 5   Download

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