jnfoage:


I saw your mention in that regard, don't worry, I know the five. The records are there, don't worry.

Now let me post the next question.

ok waiting

This is one of the questions I was asked in my present job interview.

The electrical power output of a steam turbine power plant can be used to heat up the boiler thereby generating steam for the plant without additional external energy source.

Technically justify or condemn this assertion.

One point will be awarded for this.

I will give additional one point for a scientific expression in support of your view.

Lalsaticlala.

Front page for the hustling students pls

Conservation Of Heat Energy

jnfoage:
This is one of the questions I was asked in my present job interview.

The electrical power output of a steam turbine power plant can be used to heat up the boiler thereby generating steam for the plant without additional external energy source.

Technically justify or condemn this assertion.

One point will be awarded for this.

I will give additional one point for a scientific expression in support of your view.

Water is heated, turns into steam and spins a steam turbine which drives an
electrical generator. After it passes through the turbine, the steam is condensed in a condenser. The greatest variation in the design of steam-electric power plants is due to the different fuel sources.

No attempt from us abi

Yes because thermal power station is a power plant in which heat energy is converted to electric power.energy is conserved.
I tried atleast consider me

jnfoage:
This is one of the questions I was asked in my present job interview.

The electrical power output of a steam turbine power plant can be used to heat up the boiler thereby generating steam for the plant without additional external energy source.

Technically justify or condemn this assertion.

One point will be awarded for this.

I will give additional one point for a scientific expression in support of your view.

there is need for external source, if not, the load the plant is supplying must be less than that suplied and the remaining thus goes to heating the water to steam
mathematically, this is only possible if;
Power output=Power needed to heat water to steam + Power damand of load

jnfoage:
This is one of the questions I was asked in my present job interview.

The electrical power output of a steam turbine power plant can be used to heat up the boiler thereby generating steam for the plant without additional external energy source.

Technically justify or condemn this assertion.

One point will be awarded for this.

I will give additional one point for a scientific expression in support of your view.

this is energy conservation..
according to the laws of dynamics, energy can neither be created nor destroyed but only be transformed from one form to another.

The energy efficiency of a conventional thermal
power station, considered salable energy produced
as a percent of the heating value of the fuel
consumed, is typically 33% to 48%. As with all heat engines, their efficiency is
limited, and governed by the laws of
thermodynamics. Other types of power stations are
subject to different efficiency limitations, most
hydropower stations in the United States are about
90 percent efficient in converting the energy of
falling water into electricity[5] while the efficiency of
a wind turbine is limited by Betz's law, to about
59.3percent

inschool:

there is need for external source, if not, the load the plant is supplying must be less than that suplied and the remaining thus goes to heating the water to steam

One point

dejt4u:
this is energy conservation..

One point, but aren't in the five.

jnfoage:
This is one of the questions I was asked in my present job interview.

The electrical power output of a steam turbine power plant can be used to heat up the boiler thereby generating steam for the plant without additional external energy source.

Technically justify or condemn this assertion.

One point will be awarded for this.

I will give additional one point for a scientific expression in support of your view.

Its possible...as energy cannot be created or destroyed according to the law of conservation of energy...it can be converted though... or in this case " recycled".

Dis one weak me abeg

Pressure

The energy of a thermal power plant not utilized in
power production must leave the plant in the form
of heat to the environment. This waste heat can go
through a condenser and be disposed of with
cooling water or in cooling towers. If the waste heat
is instead utilized for district heating, it is called co-
generation. An important class of thermal power
station are associated with desalination facilities;
these are typically found in desert countries with
large supplies of natural gas and in these plants,
freshwater production and electricity are equally
important co-products.
The Carnot efficiency dictates that higher efficiencies can be attained by increasing the temperature of the steam. Sub-critical fossil fuel power plants can
achieve 36–40% efficiency. Super critical designs
have efficiencies in the low to mid 40% range, with
new "ultra critical" designs using pressures of 4400
psi (30.3 MPa) and multiple stage reheat reaching
about 48% efficiency. Above the critical point for
water of 705 °F (374 °C) and 3212 psi (22.06 MPa),
there is no phase transition from water to steam,
but only a gradual decrease in density.

This is not my field. Next question and it better be a general one

femo86:
Dis one weak me abeg

As in

jnfoage:
This is one of the questions I was asked in my present job interview.

The electrical power output of a steam turbine power plant can be used to heat up the boiler thereby generating steam for the plant without additional external energy source.

Technically justify or condemn this assertion.

One point will be awarded for this.

I will give additional one point for a scientific expression in support of your view.

This is in line with laws of thermodynamics.

Energy are changed from one form (output of steam turbine plant) to another (input for boiler).

doughziay:
The energy of a thermal power plant not utilized in
power production must leave the plant in the form
of heat to the environment. This waste heat can go
through a condenser and be disposed of with
cooling water or in cooling towers. If the waste heat
is instead utilized for district heating, it is called co-
generation. An important class of thermal power
station are associated with desalination facilities;
these are typically found in desert countries with
large supplies of natural gas and in these plants,
freshwater production and electricity are equally
important co-products.
The Carnot efficiency dictates that higher efficiencies can be attained by increasing the temperature of the steam. Sub-critical fossil fuel power plants can
achieve 36–40% efficiency. Super critical designs
have efficiencies in the low to mid 40% range, with
new "ultra critical" designs using pressures of 4400
psi (30.3 MPa) and multiple stage reheat reaching
about 48% efficiency. Above the critical point for
water of 705 °F (374 °C) and 3212 psi (22.06 MPa),
there is no phase transition from water to steam,
but only a gradual decrease in density.

This definitely didn't come from your head...copy and paste?

femo86:
Dis one weak me abeg

haha

Luffy107:
Its possible...as energy cannot be created or destroyed according to the law of conservation of energy...it can be converted though... or in this case " recycled".

You are contradicting yourself.

jnfoage:

One point

ok sir

jnfoage:
One point, but aren't in the five.

I First Answered, I Said Conservation Of Energy Na, Check Well

jnfoage:

One point, but aren't in the five.

thanks, pls keep it for me till it get to my turn.. thanks

Luffy107:
This definitely didn't come from your head...copy and paste?

lol

jnfoage:

As in

As in seriously

Making effort to reduce the consumption of energy by using less of an energy service. This can be achieved either by using energy more efficiently (using less energy for a constant service) or by reducing the amount of services used

jnfoage:

You are contradicting yourself.

How?

jnfoage:
This is one of the questions I was asked in my present job interview.

The electrical power output of a steam turbine power plant can be used to heat up the boiler thereby generating steam for the plant without additional external energy source.

Technically justify or condemn this assertion.

One point will be awarded for this.

I will give additional one point for a scientific expression in support of your view.

The Rankine cycle is an idealized thermodynamic cycle of a heat engine that converts heat into mechanical work. The heat is supplied externally to a closed loop, which usually uses water as the working fluid. ... It has Boiler- where heat(coal fired) is added to convert water in steam.

@inschool....just dash me one point make I join to my 2.....abeg nah

Abeg...next question.