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Heating system operation

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  • UNIFIED FACILITIES CRITERIA (UFC) HEATING SYSTEMS OPERATION AND MAINTENANCE Any copyrighted material included in this UFC is identified at its point of use. Use of the copyrighted material apart from this UFC must have the permission of the copyright holder. U.S. ARMY CORPS OF ENGINEERS NAVAL FACILITIES ENGINEERING COMMAND (Preparing Activity) AIR FORCE CIVIL ENGINEER SUPPORT AGENCY

    pdf277p khangoc2391 11-08-2012 69 10   Download

  • Currently in India milk processing is more than 30 % of the total milk production. Since long the Indian dairy industries relies on the non-renewable sources of energy, which not only getting more and more expensive but also are responsible to serious health concerns and environmental problems such as global warming. Therefore, adoption of green energies has been promoted by research communities, social and environmental groups and government. Considering the geological location of India, solar energy has been proven most promising among the available green and renewable energies.

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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.

    pdf0p gian_anh 18-10-2012 79 31   Download

  • UFC are living documents and will be periodically reviewed, updated, and made available to usersas part of the Services' responsibility for providing technical criteria for military construction.Headquarters, U.S. Army Corps of Engineers (HQUSACE), Naval Facilities Engineering Command(NAVFAC), and Air Force Civil Engineer Support Agency (AFCESA) are responsible foradministration of the UFC system. Defense agencies should contact the preparing service fordocument interpretation and improvements. Technical content of UFC is the responsibility of thecognizant DoD working group.

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  • Engineering technology or mechanical engineering industry is the application of physical principles to create all kinds of machinery and equipment or other useful objects. Mechanical application of thermodynamic principles, the law of conservation of mass and energy to analyze static and dynamic physical systems, for design work in areas such as automotive, aircraft and the other vehicles, heating systems and cooling, household appliances, machinery and production equipment, weapons ...

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  • (BQ) The Handbook of heating ventilation and air conditioning combines practice and theory, systems and control, and the latest methods and technologies to provide, in one volume, all of the modern design and operation information needed by HVAC engineers.

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  • BACKGROUND Public agencies, private corporations, nonprofit institutions, and other organizations regularly invest millions of dollars in acquiring buildings and other constructed facilities to support their lines of business. For this investment, the owner receives a complex structure composed of hundreds of separate but interrelated components, including roofs, walls, foundations, electrical, plumbing, heating, air con- ditioning, ventilation, fire, communication, safety, and architectural systems.

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  • To protect the regenerative air heater against corrosion when operating the boiler at low loads and/or low ambient air temperatures, a steam coil air heater will be required in the secondary air ducts between the FD fans and the regenerative air heaters. The steam coil air heater should be designed to heat combustion air at any load from the minimum ambient temperature, 16.7 ºC, up to a temperature suitable to protect the cold end elements of the regenerative air heater. Supply of the steam coil air heater will not be by Babcock & Wilcox.

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  • In this paper, the author presents the optimal calculation and control process of the size of the heat sink and the contact plate under the influence of actual operation conditions at the specified velocity of the air flow from which the model is built directly to determine the number and the size of the heat sink’s plate fins.

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  • The experimental results showed that the natural circulation system is feasible in removing the decay heat, even though some fluctuations may occur in the operation. The uneven temperature distribution in the water tank may be inevitable because convection occurs on the outside of the condensing tube besides boiling with decreasing the decay power. The instabilities in the natural circulation loop are sensitive to heat flux and system resistance rather than the water level in the steam drum and water tank. RELAP5 code shows reasonable results compared with experimental data.

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  • The advanced passive pressurized water reactor (PWR) is being constructed in China and the passive residual heat removal (PRHR) system was designed to remove the decay heat. During accident scenarios with increase of heat removal from the primary coolant system, the actuation of the PRHR will enhance the cooldown of the primary coolant system. There is a risk of power excursion during the cooldown of the primary coolant system. Therefore, it is necessary to analyze the thermal hydraulic behavior of the reactor coolant system (RCS) at this condition.

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  • Twenty sodium-cooled fast reactors (SFRs) have provided valuable experience in design, licensing, and operation. This paper summarizes the important safety criteria and safety guidelines of intermediate sodium systems, steam generators, decay heat removal systems and associated construction materials and in-service inspection. The safety criteria and guidelines provide a sufficient framework for design and licensing, in particular by new entrants in SFRs.

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  • The energy flow characteristics of Combined Cooling, Heating and Power (CCHP) system are analyzed in detail and the energy flow function is proposed for its two operational strategies: thermal load dominant mode and electrical load dominant mode.

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  • The main objective of this research was to develop a solar energy based thermal reservoir cum heat exchanger using thermic fluid viz. paraffin oil as thermal heat storage and heat transfer medium for generation of hot water which can be used for milk processing operation like pasteurization of milk.

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  • In India p-v cells or arrays are efficiently contributing in various sectors for power generation and lightning systems. Beside this it can also be used to make a system that operates on direct solar energy. Efforts are made to improve the efficiency of solar crop / potatoes dryer in the present work. The present model is consisting of photovoltaic cells, charge controller, battery, heating element or coil to improve the efficiency and specially modified for working in the night environment to dry crop, spices, potatoes, fruits and vegetables.

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  • The purpose of this paper is to model the operation of the Shutdown Cooling System (SDCS) for CANDU 6 nuclear power plants in case of LOCA accidents, using Flowmaster calculation code, by delimiting models and setting calculation assumptions, input data for hydraulic analysis and input data for calculating thermal performance check for heat exchangers that are part of this system.

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  • The handbook includes information on thermodynamics and the properties of fluids; the three modes of heat transfer - conduction, convection, and radiation; and fluid flow, and the energy relationships in fluid systems. This information will provide personnel with a foundation for understanding the basic operation of various types of DOE nuclear facility fluid systems.

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  • A look on energy, renewable energies, energy storage and synthetic fuels, hybrid architecture, fuel cells, hydrogen as a vector of energy of the future.The Earth resources are quite limited in quantity Many challenges to mankind in 21st century: development, health, water, food, demography, education, energy.In physics, energy (Ancient Greek: ἐνέργεια energeia "activity, operation"[1]) is a quantity that is often understood as the ability a physical system has to produce changes on another physical system.

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  • An electric drive is the electromechanical system that converts electrical energy to mechanical motion. Being a part of automatic equipment, it acts together with the driven object, such as a machine tool, metallurgical, chemical, or flying apparatus, domestic or medical device. Electric drives area includes applications in computers and peripherals, motor starters, transportation (electric and hybrid electric vehicles, subway, etc.

    pdf102p sn_buon 29-11-2012 71 17   Download

  • A study to measure indoor concentrations and emission rates of volatile organic compounds (VOCs), including formaldehyde, was conducted in a new, unoccupied manufactured house installed at the National Institute of Standards and Technology (NIST) campus. The house was instrumented to continuously monitor indoor temperature and relative humidity, heating and air conditioning system operation, and outdoor weather. It also was equipped with an automated tracer gas injection and detection system to estimate air change rates every 2 h.

    pdf228p ut_hai_can 29-12-2012 74 17   Download

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