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TECHNICAL UNIVERSITY - SOFIA: Последно депозирани

Показване на публикации 601-620 от 944

Заглавие: On the structure of a heated three - dimensional jet Автор: Lozanova, Milena; Лозанова, Милена Дата: 1995 Резюме: Three-dimensional jets are widely used in verious technological processes. In this paper the flow field of heated jet with aspect ratio A= a/b = 3 is investigated at several initial conditions. The various characteristics of the velocity and the temperature fields are obtained. The velocity and thermal half-widths in the two principal ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Статистически анализ на климатични данни и обобщени температурни криви за гр. Пловдив Автор: Банов, Ивайло Петков; Banov, Ivailo Petkov Дата: 1995 Резюме: The paper presents the results of the statistical analysis of the climatic conditions for 30-year period of time for the town of Plovdiv. There is found the generalized temperature curve for a period of a sudden spell of cold weather in the report. In tabular form are given the initial temperature - t..., the amplitude of variation of the ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Система с непрекъснато действие за аварийно подхранване на парогенераторите за реактора тип ВВЕР Автор: Глухов, Георги Анастасов; Попов, Емилиян Любомиров; Gluhov, Georgi Anastasov; Popov, Emiliyan Lyubomirov Дата: 1995 Резюме: A possible steam injector application for improving of emergency feedwater supply Is discussed in the article. Two cases of injector implementation in the K-220-44 turbine flow diagram are analyzed. An estimation is made for the influence of injector steam consumption on the thermal performance of the turbine facility as a whole. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Относно дебелината на топлинната изолация при канално полагане на топлопреносни мрежи Автор: Геновски, Иван Кирилов; Genovski, Ivan Kirilov; Шушулов, Константин Найденов; Shushulov, Konstantin Naydenov Дата: 1995 Резюме: It is necessary to change thicknesses of insulations due to the dynamic of the main components' prizes, influenced them. This investigation concerning new evaluation of thicknesses of insulation of the district heating mains (channel laid) according to the new conditions of market economy. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Numerical prediction of comfort and ventilation efficiency in ventilated rooms Автор: Denev, Yordan A.; Денев, Йордан А.; Stankov, Petar; Станков, Петър Дата: 1995 Резюме: The paper presents investigation of comfort and ventilation efficiency in a typically chemical laboratory room with two fume cupboards. The investigation is based on the detailed results obtained from the numerical solution of a system of seven partial differential equations on a numerical grid of 245000 points. The assessment of comfort ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Моделиране на товаровия график на битови електропотребители Автор: Николов, Димитър Александров; Nikolov, Dimitar Alexandrov Дата: 1995 Резюме: The rational design of the electrical supplying systems in the populated areas requires exact normative values of the calculated loads. The experimental determination of these loads is quite difficult, because of the great volume of labour consuming measurements. In order to make easier these measurements it was suggested a method for ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Изследване на нетрадиционни режими на пускорегулираща апаратура за луминесцентни лампи Автор: Джагаров, Николай; Dzhagarov, Nikolay; Пенчев, Пенчо; Penchev, Pencho Дата: 1995 Резюме: Широко се внедрява високочестотна пуско-регулираща апаратура (ПРА) за луминисцентни лампи, осигуряваща по-добри качествени показатели като увеличено светлоотдаване, надеждна работа и други технико-икономически показатели. С повишаване на честотата процесите в лампите и ПРА се изменят значително, като особено значение придобиват нетрадиционните ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Детерминирани показатели за надежност при топлоснабдителни системи Автор: Шушулов, Константин Найденов; Геновски, Иван Кирилов; Shushulov, Konstantin Naydenov; Genovski, Ivan Kirilov Дата: 1995 Резюме: District heating systems are characterised with certain rate of reliability. It should, be possible to influence this reliability by means of technical and economical impacts. To estimate the technical conditions of the consumers, there are strong characteristics which are not influenced from the probable character of the reliable factor. ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Формализация на управляваща повърхнина от размити управляващи правила Автор: Станчев, Валентин Георгиев; Stanchev, Valentin Georgiev Дата: 1995 Резюме: The control surface represents a mode for presentation of fuzzy control algorithm. The advantage taken of using that mode consists of the following: the operations "fitzzyfication", "control strategy" and "defitzzyfication" are combined and not executed separately, i.e. for each observation of input data the result of surface interpolation ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Алгоритмизация на управлението чрез апарата на размитите множества Автор: Станчев, Валентин Георгиев; Григоров, Александър Данчев; Stanchev, Valentin Georgiev; Grigorov, Alexandar Danchev Дата: 1995 Резюме: In this paper, a basic approaches and stages in building of a fizzy control system by means of algorithmization of control signals using fizz)) see, are considered. The described stages during the fuzzy control algorithm synthesis are quantitatively determined for industrial boiler KM-12, along the channel "fuel pressure". Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Дългосрочни климатични характеристики за проектиране и анализ на пасивни слънчеви системи в Сирия Автор: Фарес, Амине; Fares, Amine Дата: 1995 Резюме: For the design and evaluation of the effectiveness of passive systems it is necessary to know the long-term characteristics of the main climatic factors which also determine the basic input energy flow. A data base for a 25 year period for five representative areas in Syria has been analyzed and the substantial long -term characteristics ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Прибор за непрекъснато измерване влагосъдържанието на пряснята пара в АЕЦ Автор: Иванов, Георги Рампов; Ivanov, Georgi Rampov Дата: 1995 Резюме: In the article are described the basic requirements, used for the design of a real microprocessor-based device for continuous fresh steam wetness fraction measurement in a nuclear power plant with saturated steam turbines. The throttling calorimeter has been chosen, as the most accurate and applicable for the Nuclear Power Plant (NPP) ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Влияние на началното влагосъдържание на парата върху ефективността на турбина К 220-44 Автор: Иванов, Георги Рампов; Маринов, Марин Александров; Ivanov, Georgi Rampov; Marinov, Marin Alexandrov Дата: 1995 Резюме: By means of a computer software, an investigation was made for the influence of the inlet steam wetness fraction on the power and turbine Efficiency of the high pressure stage of the saturated steam turbine type K.220-44 at different load levels. Due to the reheat after the high pressure stage, the influence of the inlet parameters is limited ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Анализ на чувствителността на температурното поле в стена на тромб Автор: Калоянов, Никола; Фарес, Амине; Fares, Amine; Kaloyanov, Nikola Дата: 1995 Резюме: The modelling of heat transfer processes in an accumulating Trombe-Michel wall is connected inevitably with the character of the input energy flow. It is exceptionally dcult to obtain common mathematical description of the dynamic heat exchange process involving all the components of the input energy flow. In order to simplify the problem ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Приложение на регулатори с променлива структура за управление на енергийни обекти Автор: Каранешев, Светослав Ангелов; Ганев, Ивайло Гинев; Karaneshev, Svetoslav Angelov; Ganev, Ivailo Guinev Дата: 1995 Резюме: A control structure is proposed, consisting of PID controller with variable structure and a block for independent compensation of the disturbances in the control loop. A comparison of the transient processes and amplitude, vs frequency characteristics of the proposed control structure and digital PI and PID controllers is made. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Технически средства за измерване на разход с гарантирани метрологични характеристики Автор: Ганев, Ивайло Гинев; Каранешев, Светослав Ангелов; Начев, Георги Начев; Ganev, Ivailo Ginev; Karaneshev, Svetoslav Angelov; Nachev, Georgi Nachev Дата: 1995 Резюме: Aproaches to minimise the systematic and additional errors when measuring flow with Ventoury type trans:niter are discussed. An evaluation of the influencing factors and the incertainty limits of the apriori information is made. A conclusion is made regarding the possibility to design intelligent flowmeters with improved metrological characteristics. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Динамични свойства на пламъчно - тръбни котли Автор: Григоров, Александър Данчев; Grigorov, Alexandar Danchev Дата: 1995 Резюме: In this paper on the basis of the power engineering approach, in analytical way, are obtained mathematical models, describing the dynamics of the flame-tube boilers that are manufactured and widely distributed in the notional decentralized power economy. There are included both the control and disturbances dynamical canals of steam and water ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Annual energy consumption of air - conditioning systems Автор: Stoichkov, Nikola Yordanov; Стоичков, Никола Йорданов; Димитров, Генко; Dimitrov, Genko Дата: 1995 Резюме: An algorithm and software for air-conditioning systems annual energy consumption is carried out on the basis of hourly simulations. For external loads estimation the Test Reference Year for Sofia is used. The same room with constant internal loads was examined. Simulation models for systems with constant (CAV and variable (VAV) air volume ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Test reference year for Sofia Автор: Stoichkov, Nikola Yordanov; Стоичков, Никола Йорданов; Калоянов, Никола Георгиев; Димитров, Генко Иванов; Kaloyanov, Nikola Georgiev; Dimitrov, Genko Ivanov Дата: 1995 Резюме: Test Refence Year (TRY) is it set of 8760 hourly coincident data for air temperature and relative humidity,, duration' sunshine, intensity of total solar radiation on horizontal surface, wind velocity and direction. TRY is used as a data base for simulating the performance of solar energy systems, building energy consumption and for indoor ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Моделиране обтичането на крило с несвиваема вискозна среда Автор: Савов, Владимир Светославов; Гешев, Диан Ненов; Savov, Vladimir Svetoslavov; Geshev, Dian Nenov Дата: 1995 Резюме: Smooth flow around a wing of moderate aspect ratio and sweepback is simu-lated by the discrete vortex method assuming that the medium is inviscous and the wing is replaced with its middle surface. The effective wing section angle of attack is derived and using two-dimensional boundary layer with pressure gradient is calculated by the Polhausen ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA

Показване на публикации 601-620 от 944

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