An ideal Brayton cycle stationary power plant operates with a
pressure ratio of 10 to 1....
An ideal Brayton cycle stationary power plant operates with a
pressure ratio of 10 to 1. if it is designed to generate 800 MW of
power what is the minimum flow rate required?
The pressure ratio of a power plant operating
according to the ideal brayton cycle is 8. Gas temperature 300K at
compressor inlet, at the entrance of the turbine is 1300K. Using
air standard acceptance and taking into account the change of
specific temperatures with temperature,
a.) Calculate the temperature of the gas at the compressor and
turbine outlet.
b.) Calculate the thermal efficiency of the cycle.
c.) Calculate the backward work rate.
A gas turbine power plant operates on a Brayton cycles
has a pressure ratio of 7. Air enters the
compressor at 300 K. The energy in the form of heat is transferred
to the air in the amount of 950
kJ/kg. Using a variable specific heat for air and assuming the
compressor isentropic efficiency is
83 percent and turbine isentropic efficiency is 85 percent.
Determine the followings:
(i) The highest temperature in the cycle [5 marks]
(ii) The net work...
a simple ideal Brayton cycle with air as the working fluid has a
pressure ratio of 10. The air enters the compressor at 520 R and
the turbine at 2000 R. Accounting for the variation of specific
heats with temperature, determine (a) the ait temperature at the
compressor exit, (b) the back work ratio, and (c) the thermal
efficiency.
A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 100 and 1200 kPa. The working fluid is air, which enters the compressor at 300K at a rate of 150 m3/min and leaves the turbine at 773K. Using variable specific heats for air and assuming a compressor isentropic efficiency of 82 percent and a turbine isentropic efficiency of 88 percent, determine:
(a) the net power output
(b) the back work ratio
(c) the thermal efficiency
Design a gas power plant that works as a non-ideal Regenerative
Brayton cycle by determining the pressure ratio required to
optimize the net power output of the cycle. The minimum cycle
temperature is 300 K while the maximum cycle temperature is 1780 K.
The isentropic efficiency of the turbine is 85% while that of the
compressor is 75%. The effectiveness of the regenerator is to be
taken as 0.8 while the gas flow rate is 30 kg/s. A T-s diagram...
A gas-turbine power plant operates on the simple Brayton cycle
with air as the working fluid and delivers 32 MW of power. The
minimum and maximum temperatures in the cycle are 310 and 900 K,
and the pressure of air at the compressor exit is 8 times the value
at the compressor inlet. Assuming an isentropic efficiency of 80%
for the compressor and 86% for the turbine, determine the mass flow
rate of air through the cycle. Account for the...
The efficiency of the Brayton cycle increases with an increase
in the pressure ratio across the compressor. What limits our use of
this tactic to increase cycle efficiency? What trade-offs have to
be made?
plase typr the answer no hand writing
Steam enters the high-pressure turbine of a steam power plant
that operates on the ideal reheat Rankine cycle at 6 MPa and 500°C
and leaves as saturated vapor. Steam is then reheated to 400°C
before it expands to a pressure of 10 kPa. Heat is transferred to
the steam in the boiler at a rate of 6*104 kW. Steam is
cooled in the condenser by the cooling water from a nearby river,
which enters the condenser at 7°C. Show the...
A
steam power plant operates on the simple ideal rankine cycle. the
steam enters the turbine at 4 MPa and 500 C and leaves it at 50 kPa
and 150 C. the water leaves the condenser as a saturated liquid and
is subsequently displaced to the boiler by means of a pump at a
temperature of 85 C, which is the isentrophic efficiency of the
turbine?
Consider an ideal Brayton cycle with reheat (air standard). The
pressure and temperature of the air at the inlet of the gas turbine
is 1200 kPa and 1000 K respectively. Assume the gas expands to 100
kPa in two stages. Between the stages, the air is reheated at a
constant pressure of 350 kPa to 1000 K. Assume a fully isentropic
process in the turbines.
Find:
(a) the work produced at each stage, in kJ/kg of air flowing.
(b) the...