(b) the heat supplied at p C per kg of airof(c) the work done per kg of air(d) the cycle efficiency1252 K(e) the temperature at the end of theC heating process,(f) the cut-off ratio, and.21 MP-g) the m.e.p. of the cycle5. A gas turbine plant draws in air at 1.013 bar, 10 °C and has a pressure ratio of 5.5. The maximumtemperature in the cycle is limited to 750 °C, compression is conducted in an uncooled rotarycompressor having an isentropic efficiency of 82 % and expansion takes place in turbine with anisentropic efficiency of 85 %. A heat exchanger with an effectiveness of 70 % is fitted between thecompressor outlet and combustion chamber. For an air flow of 40 kg/s, find(a) overall cycle efficiency.4(b) turbine output and(c) air fuel ratio if the caloric value of the fuel used is 45.22 MJ /kg.6. In regenerative gas turbine power plant, air enters the compressor at 1 bar, 27°C and is compressedto 4 bar. The isentropic efficiency of the compressor is 80 "C and the regenerator effectiveness is90 °C. All of the power developed by high pressure turbine is used to drive the compressor andthe lower pressure turbine provides the net power output of 97 kW. Each turbine has an isentropicefficiency of 87 °C and the temperature at inlet to the high pressure turbine is 1200 K. Determine0.562 kg/s0.42]$23.2 K(a) mass flow rate of air into the compressor(b) thermal efficiency, and(c) the temperature of the air at exit of the regenerator7. A gas refrigeration system as shown in Fig. ??, using air as the working fluid has a pressure ratioof 5. Air enters the compressor at 0 °C. The high pressure air is cooled to 35 °C by rejectingheat to the surroundings. The refrigerant leaves the turbine at -80 °C and then it absorbs heatfrom the refrigerated space before entering the regenerator. The mass flow rate of air is 0.4 kg/sAssuming isentropic efficiencies of 80% for the compressor and 85 % for the turbine and usingconstant specific heats at room temperature, determine(a) the effectiveness of the regenerator(b) the rate of heat removal from the refrigerated space,(c) the COP of the cycle, and(d) the refrigeration load and the COP if this system operated on the simple gas refrigeration cycle.Use the same compressor inlet temp, as given, the same turbine inlet temperature as calculatedand the same compressor and turbine efficiencies27.7 kW, 0.5998. Consider a two stage compressor refrigeration system operating between the pressure limit of 0.8and 0.14 MPa. The working fluid is R - 134a. The refrigerant leaves the condenser as a saturatedliquid and is throttled to a flash chamber operating at 0.4 MPa. Part of the refrigerant evaporatesduring this flashing process, and this vapour is mixed with the refrigerant leaving the low pressure2 of

Question
Asked Nov 14, 2019
78 views

please solve Q6 asap

make sure the answer matches with the given answer.

solve without using reduced pressure concept and also without use of referring to table of ideal gas(air) for calculating enthalpy or temperature etc.

(b) the heat supplied at p C per kg of air
of
(c) the work done per kg of air
(d) the cycle efficiency
1252 K
(e) the temperature at the end of the
C heating process,
(f) the cut-off ratio, and
.21 MP-
g) the m.e.p. of the cycle
5. A gas turbine plant draws in air at 1.013 bar, 10 °C and has a pressure ratio of 5.5. The maximum
temperature in the cycle is limited to 750 °C, compression is conducted in an uncooled rotary
compressor having an isentropic efficiency of 82 % and expansion takes place in turbine with an
isentropic efficiency of 85 %. A heat exchanger with an effectiveness of 70 % is fitted between the
compressor outlet and combustion chamber. For an air flow of 40 kg/s, find
(a) overall cycle efficiency
.4
(b) turbine output and
(c) air fuel ratio if the caloric value of the fuel used is 45.22 MJ /kg.
6. In regenerative gas turbine power plant, air enters the compressor at 1 bar, 27°C and is compressed
to 4 bar. The isentropic efficiency of the compressor is 80 "C and the regenerator effectiveness is
90 °C. All of the power developed by high pressure turbine is used to drive the compressor and
the lower pressure turbine provides the net power output of 97 kW. Each turbine has an isentropic
efficiency of 87 °C and the temperature at inlet to the high pressure turbine is 1200 K. Determine
0.562 kg/s
0.42]
$23.2 K
(a) mass flow rate of air into the compressor
(b) thermal efficiency, and
(c) the temperature of the air at exit of the regenerator
7. A gas refrigeration system as shown in Fig. ??, using air as the working fluid has a pressure ratio
of 5. Air enters the compressor at 0 °C. The high pressure air is cooled to 35 °C by rejecting
heat to the surroundings. The refrigerant leaves the turbine at -80 °C and then it absorbs heat
from the refrigerated space before entering the regenerator. The mass flow rate of air is 0.4 kg/s
Assuming isentropic efficiencies of 80% for the compressor and 85 % for the turbine and using
constant specific heats at room temperature, determine
(a) the effectiveness of the regenerator
(b) the rate of heat removal from the refrigerated space,
(c) the COP of the cycle, and
(d) the refrigeration load and the COP if this system operated on the simple gas refrigeration cycle.
Use the same compressor inlet temp, as given, the same turbine inlet temperature as calculated
and the same compressor and turbine efficiencies
27.7 kW, 0.599
8. Consider a two stage compressor refrigeration system operating between the pressure limit of 0.8
and 0.14 MPa. The working fluid is R - 134a. The refrigerant leaves the condenser as a saturated
liquid and is throttled to a flash chamber operating at 0.4 MPa. Part of the refrigerant evaporates
during this flashing process, and this vapour is mixed with the refrigerant leaving the low pressure
2 of
help_outline

Image Transcriptionclose

(b) the heat supplied at p C per kg of air of (c) the work done per kg of air (d) the cycle efficiency 1252 K (e) the temperature at the end of the C heating process, (f) the cut-off ratio, and .21 MP- g) the m.e.p. of the cycle 5. A gas turbine plant draws in air at 1.013 bar, 10 °C and has a pressure ratio of 5.5. The maximum temperature in the cycle is limited to 750 °C, compression is conducted in an uncooled rotary compressor having an isentropic efficiency of 82 % and expansion takes place in turbine with an isentropic efficiency of 85 %. A heat exchanger with an effectiveness of 70 % is fitted between the compressor outlet and combustion chamber. For an air flow of 40 kg/s, find (a) overall cycle efficiency .4 (b) turbine output and (c) air fuel ratio if the caloric value of the fuel used is 45.22 MJ /kg. 6. In regenerative gas turbine power plant, air enters the compressor at 1 bar, 27°C and is compressed to 4 bar. The isentropic efficiency of the compressor is 80 "C and the regenerator effectiveness is 90 °C. All of the power developed by high pressure turbine is used to drive the compressor and the lower pressure turbine provides the net power output of 97 kW. Each turbine has an isentropic efficiency of 87 °C and the temperature at inlet to the high pressure turbine is 1200 K. Determine 0.562 kg/s 0.42] $23.2 K (a) mass flow rate of air into the compressor (b) thermal efficiency, and (c) the temperature of the air at exit of the regenerator 7. A gas refrigeration system as shown in Fig. ??, using air as the working fluid has a pressure ratio of 5. Air enters the compressor at 0 °C. The high pressure air is cooled to 35 °C by rejecting heat to the surroundings. The refrigerant leaves the turbine at -80 °C and then it absorbs heat from the refrigerated space before entering the regenerator. The mass flow rate of air is 0.4 kg/s Assuming isentropic efficiencies of 80% for the compressor and 85 % for the turbine and using constant specific heats at room temperature, determine (a) the effectiveness of the regenerator (b) the rate of heat removal from the refrigerated space, (c) the COP of the cycle, and (d) the refrigeration load and the COP if this system operated on the simple gas refrigeration cycle. Use the same compressor inlet temp, as given, the same turbine inlet temperature as calculated and the same compressor and turbine efficiencies 27.7 kW, 0.599 8. Consider a two stage compressor refrigeration system operating between the pressure limit of 0.8 and 0.14 MPa. The working fluid is R - 134a. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.4 MPa. Part of the refrigerant evaporates during this flashing process, and this vapour is mixed with the refrigerant leaving the low pressure 2 of

fullscreen
check_circle

Expert Answer

Step 1

Consider the T-S diagram for the regenerative gas turbine power plant.

Here, some assumptions are to be made like, each component is analysed as a control volume at steady state, the compressor, turbines and regenerator shows adiabatic behaviour and the working fluid is taken air but shows ideal behaviour.

help_outline

Image Transcriptionclose

12D K Turbine T RS Lbo Pressus 5s Turbine Ceit the Regeueralor

fullscreen
Step 2

Observe the T-S diagram of the turbine power plant and consider the State 1 where the air enters the compressor. Here,

help_outline

Image Transcriptionclose

= 27°C -300 K h300.19 kJ/kg P, =1.3860

fullscreen
Step 3

Further, observe the next step, where the isentropic compression takes place. Determine the pressure at the Step 2S wil...

help_outline

Image Transcriptionclose

Р. PR Pry 4 bar (1.3860) 1 bar = 5.544 And, hs 446.49 kJ/kg Compressor efficiency nc 446.49 kJ/kg -300.19 kJ/kg h-300.19 kJ/kg 483.06 kJ/kg 0.8=

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Engineering

Mechanical Engineering

Related Mechanical Engineering Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: Match each of the following terms to the phrase that describes it. Answers are used only once.

A: The terms matching the given phrases are as given below.

question_answer

Q: please solve Q5 asap

A: Click to see the answer

question_answer

Q: I need help answering problems 11 and 12 pertaining to the print provided below.

A: 11.The threaded holes are represented as shown below figure.

question_answer

Q: true or False? The computer in most late-model vehicles must undergo a relearn or initialization pro...

A: Disconnecting the battery deletes several information from the ECUs (Electronic Control Units) or co...

question_answer

Q: At the beginning of the compression stroke an ideal otto cycle has an ideal pressure of 15 psia. A t...

A:  Note: As we are entitled to answer only the first three sub-parts. So, I have answered  first three...

question_answer

Q: A closed, rigid, 0.55 m3 tank is filled with 9 kg of water.  The initial pressure is p1 = 20 bar.  T...

A: The following data have been given to us.The volume of the tank, V = 0.55 m3.The initial pressure of...

question_answer

Q: In the FILLET command, when selecting the objects to fillet, holding down the <Shift> key: a. ...

A: By holding the <Shift> key before selecting the second object when using a FILLET command, the...

question_answer

Q: Replace the system of two forces and one couple by a wrench. Determine the magnitude of the moment M...

A: Write the position vector of the all points.

question_answer

Q: True or False: A fillet radius can be drawn between two parallel objects.

A: When filleting two parallel lines, a 180 degree arc will join the two lines. The radius of the fille...