Xem 1-20 trên 46 kết quả Heating equipment
  • This book is intended as a guide to the selection or design of the principal kinds of chemical process equipment by engineers in school and industry. The level of treatment assumes an elementary knowledge of unit operations and transport phenomena.

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  • This section describes heating, ventilating, and air conditioning (HVAC) systems and discusses characteristics and components of automatic control systems. Cross-references are made to sections that provide more detailed information. A correctly designed HVAC control system can provide a comfortable environment for occupants, optimize energy cost and consumption, improve employee productivity, facilitate efficient manufacturing, control smoke in the event of a fire, and support the operation of computer and telecommunications equipment....

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  • One advantage of conducting after-hours building walk-throughs to collect data on office equipment power status is that more buildings can be surveyed with a given amount of time and money. On the other hand, the data collected represents a snapshot in time, and does not capture variations in user behavior over time, which would require automated long-term time series metering of equipment power state and power levels. This is our most robust sample of buildings to date for collecting data on the after hours power status of office equipment.

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  • During the past 20 years, design and operation of the comfort systems for buildings have been transformed because of energy conservation imperatives, the use of computer-based design aids, and major advances in intelligent management systems for buildings. In the 1970s, rules of thumb were widely used by designers. Today, a strong analytical basis for the design synthesis process is standard procedure. This handbook describes the latest methods for design and operation of new and existing buildings.

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  • Cooling means the removal of heat. In HVAC, a cooling process is usually identified as one which lowers the temperature or humidity (or both) of the ambient air. The effective temperature includes not only the temperature and humidity of the ambient air but also radiant effects and air movement. Some adiabatic cooling processes, i.e., evaporative cooling, do not actually remove any heat, but create a sensation of cooling by lowering the sensible temperature of the air.

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  • This book covers a number of topics in heat and mass transfer processes for a variety of industrial applications. The research papers provide information and guidelines in terms of theory, mathematical modeling and experimental findings in many research areas relevant to the design of industrial processes and equipment. The equipment includes air heaters, cooling towers, chemical system vaporization, high temperature polymerization and hydrogen production by steam reforming.

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  • In the wake of energy crisis due to rapid growth of industries, urbanization, transportation, and human habit, the efficient transfer of heat could play a vital role in energy saving. Industries, household requirements, offices, transportation are all dependent on heat exchanging equipment. Considering these, the present book has incorporated different sections related to general aspects of heat transfer phenomena, convective heat transfer mode, boiling and condensation, heat transfer to two phase flow and heat transfer augmentation by different means....

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  • Heat transfer calculations in different aspects of engineering applications are essential to aid engineering design of heat exchanging equipment. Minimizing of computational time is a challenging task faced by researchers and users. Methodology of calculations in some application areas are incorporated in this book, such as differential analysis of heat recoveries with CFD in a tube bank, heating and ventilation of equipment and methods for analytical solution of nonlinear problems.

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  • In many small and shallow aquifers the hydrochemistry does not evolve further. However, the baseline natural quality of groundwater may vary spatially within the same aquifer if the mineral assemblages vary, and also evolves with time as the water moves along groundwater flow lines. If an aquifer dips below a confining layer (Figure 2.5), a sequence of hydrochemical processes occurs with progressive distance down gradient away from the outcrop, including precipitation of some solids when relevant ion concentrations reach saturation levels for a solid mineral phase.

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  • HiGain® doubler units (HDUs) allow HiGain systems to be used for applications outside the Carrier Service Area (CSA), increasing the range by up to five times. Span equipment consists of HDUs that can be deployed in the existing repeater enclosures or in remote enclosures for higher deployment density and lower deployment costs. Enclosures are available for both above- and below-ground installations.

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  • Introduction To determine the temperature differences encountered in the flow of heat within electronic systems, it is necessary to recognize the relevant heat transfer mechanisms and their governing relations. In a typical system, heat removal from the active regions of the microcircuit(s) or chip(s) may require the use of several mechanisms, some operating in

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  • This book attempts to bring together the theory and practice of dielectric materials for different kind of industrial applications. Fragmented information on dielectric theory and properties of materials, design of equipment and state of the art in applications relevant to the manufacturing industry should be collated and updated and presented as a single reference volume. In this book relevant and useful information is presented in the quoted literature and covered by our key patent applications....

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  • The iconic two-century-old Capitol hill landmark operates under the jurisdiction of the Architect of the Capitol, the agency responsible for historical preservation and incorporating energy-efficiency features. Once the new equipment financed by the bank is installed and operational, annual energy savings are expected to reach 4,637 megawatt hours of electricity and 107,587 million BTus (British thermal units) of steam and chilled water energy. In the first full year alone, the financial savings from this initiative are projected to be $2.3 million.

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  • Foundry Shoes In addition to insulating the feet from the extreme heat of molten metal, foundry shoes keep hot metal from lodging in shoe eyelets, tongues or other shoe parts. These snug-fitting leather or leather-substitute shoes have leather or rubber soles and rubber heels. All foundry shoes must have built-in safety toes. Care of Protective Footwear As with all protective equipment, safety footwear should be inspected prior to each use. Shoes and leggings should be checked for wear and tear at reasonable intervals.

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  • .Fuel of the Cell - ATP .Adenosine-5’-triphosphate C6H12O6 + 6O2 -- 6CO2 + 6H2O + Energy (ATP + heat) .ATP synthesis – Cellular Respiration .

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  • As network equipment such as routers and switches, continues to evolve, changes in proper cable-management techniques and recommendations must also keep up with the times. Routers and switches are being marketed with higher densities and more capabilities. These higher-density platforms have more cables feeding them and require more power. More powerful equipment gives out more heat, so careful airflow and thermal management is more important than ever. Density within a single cabinet is increasing.

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  • Combustion units (process furnaces, steam boilers and gas turbines) give rise to emissions of carbon dioxide, nitrogen oxides, sulphur dioxide and particulates. Nitrogen oxide emissions are most commonly reduced by combustion modifications that reduce temperatures and hence the formation of thermal NOx. The techniques include low NOx burners, flue gas recirculation, and reduced pre-heat. Nitrogen oxides can also be removed after they have formed by reduction to nitrogen using Selective Non Catalytic Reduction (SNCR) or Selective Catalytic Reduction (SCR). Water pollutant control.

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  • The charging process can be speeded up by applying swabs dipped in warm water to the refrigerant cylinder. Never heat cylinders with a blowtorch or immerse them in boiling or very hot water. A rapid charger is available. This device, fitted between the hose and the cylinder, acts as a restrictor or limit valve, maintaining a higher constant pressure in the cylinder and preventing early frosting. The vapour passing through the device is less superheated when it reaches the compressor, so less time is taken to charge the system....

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  • The cylinder is cooled so that, when it is heated by friction, the midpoint of the high and low temperatures will be at room temperature. In the first half of the experiment, therefore, heat will be transferred from the room air into the cooler cylinder. As the cylinder heats beyond room temperature though, heat will be transferred out of the cylinder back into the room atmosphere. By letting the change in cylinder temperature be symmetrical about the room temperature, the quantity of heat transferred to and from the cylinder and room should be approximately equal.

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  • MODERN POWER-PLANT CYCLES AND EQUIPMENT CYCLE ANALYSES 1.4 Choosing Best Options for Boosting Combined-Cycle Plant Output 1.4 Selecting Gas-Turbine Heat-Recovery Boilers 1.10 Gas-Turbine Cycle Efficiency Analysis and Output Determination 1.13 Determining Best-Relative-Value of Industrial Gas Turbines Using a LifeCycle Cost Model 1.18 Tube Bundle

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