Mass And Energy Analysis Of Control Volumes Solutions Pdf

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In the previous sections, it was noted that nozzles, diffusers, turbines, compressors and other devices undergo a steady-flow process because of their long-time running consideration.

The streamlines for this flow are given by the family of curves. The water jet exiting from a stationary tank through a circular opening of diameter mm impinges on a rigid wall as shown in the figure. Neglect all minor losses and assume the water level in the tank to remain constant. An ideal water jet with volume flow rate of 0. Consider the following statements regarding streamline s :.

Mass and Energy Analysis of Control Volumes

If we divide through by the mass flow and set the inlet of the control volume as station 1, and the outlet as station 2, then. It is also more convenient to divide the work into two terms: 1 the flow work done by the system which is p 2 v 2 -p 1 v 1 , and 2 any additional work which we will term external work or shaft work , w s. Then we have. Enthalpy is most useful for separating flow work from external work as might be produced by a shaft crossing the control volume boundary for instance. In the figure shown below. The first law relates the change in energy between states 1 and 2 to the difference between the heat added and the work done by the system.

Chapter 4 Mass and Energy Analysis of Control Volumes (Open Systems)

We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you! Published by Jesse Works Modified over 5 years ago. In addition to the heat transfer and work crossing the system boundaries, mass carries energy with it as it crosses the system boundaries.

Closed systems: The mass of the system remain constant during a process. Control volumes: Mass can cross the boundaries, and so we must keep track of the amount of mass entering and leaving the control volume. Conservation of Mass Principle The conservation of mass principle for a control volume: The net mass transfer to or from a control volume during a time interval t is equal to the net change increase or decrease in the total mass within the control volume during t. General conservation of mass in rate form Conservation of mass principle for an ordinary bathtub. For steady-flow processes, we are interested in the amount of mass flowing per unit time, that is, the mass flow rate. Multiple inlets and exits. Special Case: Incompressible Flow The conservation of mass relations can be simplified even further when the fluid is incompressible, which is usually the case for liquids.

Under these conditions the mass and energy content of the control volume are Solution: Answer: D. Flow work and the energy of a flowing fluid. Energy.


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CHAPTER-5 Mass and Energy Analysis of Control Volumes

It is based on the law of conservation of momentum or on the momentum principle, which states that the net force acting on a fluid mass is equal to the change in momentum of flow per unit time in that direction. The impulse-momentum equation 1 is used to determine the resultant force exerted by a flowing fluid on a pipe bend. Let v 1 , p 1 and A 1 are the velocity, pressure and area at the section 1 of the pipe.

Apply the conservation of mass principle to various systems including steady- and unsteady-flow control volumes. Apply the first law of thermodynamics as the statement of the conservation of energy principle to control volumes. Identify the energy carried by a fluid stream crossing a control surface as the sum of internal energy, flow work, kinetic energy, and potential energy of the fluid and to relate the combination of the internal energy and the flow work to the property enthalpy. Solve energy balance problems for steady-flow devices such as nozzles, compressors, turbines, throttling valves, mixers, heaters, and heat exchangers.

Кроме незначительной разницы в атомном весе, они абсолютно идентичны. - Атомный вес! - возбужденно воскликнул Джабба.  - Единственное различие - их атомный вес. Это и есть ключ. Давайте оба веса. Мы произведем вычитание. - Подождите, - сказала Соши.

CHAPTER-5 Mass and Energy Analysis of Control Volumes - Free download as Powerpoint Presentation .ppt), PDF File .pdf), Text File .txt) or view (c) Cp at K is used. Solution: Conservation of energy:

Но она понимала, что надежды нет: электроника вряд ли уцелела после катастрофы. Двигаясь в дыму, она вдруг вспомнила слова Хейла: У этого лифта автономное электропитание, идущее из главного здания. Я видел схему.

 - Стратмор хмыкнул, раздумывая, как поступить, потом, по-видимому, также решил не раскачивать лодку и произнес: - Мисс Флетчер, можно поговорить с вами минутку. За дверью. - Да, конечно… сэр.  - Сьюзан не знала, как. Бросила взгляд на монитор, потом посмотрела на Грега Хейла.

 - Не веришь моей интуиции. Так я тебе докажу. ГЛАВА 20 Городская больница располагалась в здании бывшей начальной школы и нисколько не была похожа на больницу. Длинное одноэтажное здание с огромными окнами и ветхое крыло, прилепившееся сзади.

Бринкерхофф и Мидж смотрели, как он нервно шагает по комнате, волоча за собой телефонный провод. Директор АНБ напоминал тигра на привязи. Лицо его все сильнее заливалось краской. - Невероятно! - воскликнул он и снова швырнул трубку.

Подумать. - Что вы имеете в виду. - Да он смеялся над нами. Это же анаграмма.

Голос шефа из смешливого вдруг стал жестким: - Сьюзан, я звоню потому, что ты нужна мне. Срочно. Она попыталась собраться с мыслями.

 Подождите… сейчас посмотрю… отлично… - Сорок пять секунд! - раздался крик. Сьюзан взглянула на ВР. Последний защитный слой был уже почти невидим. - Вот оно! - воскликнула Соши.

Гул становился все громче. И вдруг впереди словно зажглась заря. Темнота стала рассеиваться, сменяясь туманными сумерками. Стены туннеля начали обретать форму.

Вы, должно быть, много путешествуете.


  1. Sam G. 15.04.2021 at 02:53

    Chapter 5 MASS AND ENERGY ANALYSIS OF CONTROL VOLUMES against the exit cwa13301.orgs The problem is solved using EES, and the solution is.

  2. Joseph J. 15.04.2021 at 04:26

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