Steam power plant , Mechanical Engineering

Steam power plant:

Steam power plant converts heat energy Q from combustion of fuel into mechanical work W of shaft rotation which is used to generate electricity. This type plant operates on thermodynamic cycle in closed loop of processes following one another such that working fluid of steam and water repeats the cycles continuously. If first law of thermodynamics is applied to thermodynamic cycle in which working fluid returns to the initial condition of it, the energy flowing into fluid at the time of cycle should be equal to that flowing out of cycle.

Qin + Win = Qout + Wout Or,    Qin  - Qout = Wout - Win Where;

Q = Rate of Heat transfer

W = Rate of work transfer, that is power

Heat and work are mutually convertible. However, quantity of work energy can be converted into heat energy, the converse is not true. A quantity of heat cannot be converted into work.

Heat flows because of temperature difference, and this means that in order to flow, two heat reservoirs should be present; a hot source and a cold sink. During heat flow from the hot source to cold sink, a fraction of flow can be converted into work energy, and function of power plant is to generate this conversion. However, some heat should flow into the cold sink because of its presence. Thus rate of heat transfer Qout of the cycle should always be positive and the efficiency of conversion of heat energy into work energy can never be 100 percent at all. Thermodynamic efficiency for the cycle, nth is the measure of how well cycle converts heat into work.

1809_Steam power plant.png

Posted Date: 10/15/2012 6:46:22 AM | Location : United States







Related Discussions:- Steam power plant , Assignment Help, Ask Question on Steam power plant , Get Answer, Expert's Help, Steam power plant Discussions

Write discussion on Steam power plant
Your posts are moderated
Related Questions
physical meaning of viscous damping

when correction couple should be applied?

A motor cycle with rider, weight of 250 Kg., the centre of Gravity of the machine and rider combined being 60 cm above from ground level when the machine is standing upright. Each

Determine Strain energy stored in coiled helical spring: For a close coiled helical spring subjected to an axial load of 200 N with 10 coils of wire of diameter 18 mm and buil

Describe the modes of failure in bearing capacity. Modes of Failure: Behaviour of foundations subjected to load based on actual observations suggests that the bearing capaci

Reduced costs result from failure Easier fermenter planning (particularly in light of above) Easier downstream scheduling Off the shelf supplies e.g. motors Routine sup

I have a project due in 20 hours and I need help please.

System of force

A hermite curve passes through the points (1,0), (0.866, 0.5), (0.5, 0.866), (0,1) which are parameterized at u=0,0.25,0.75,1 respectively. determine geometric coefficient of the c

Basic Components of Engine: The major components of the engine and their functions are briefly given hereunder. Figure shows a cut model of motorcycle engine, where various intern