A reheat steam cycle has 13500 kPa throttle pressure at the turbine inlet and 2800 kPa reheat pressure. The throttle and reheat temperature of the steam is 540°C. The condenser pressure is 3.4 kPa. Find the cycle thermal efficiency in %. Note: At 13.5 MPa, tsat = 333.88 deg C, Sf = 3.5921 kJ/kg-K, sg = 5.4022 kJ/kg-K.

A reheat steam cycle has 13500 kPa throttle pressure at the turbine inlet and 2800 kPa reheat pressure. The throttle and reheat temperature of the steam is 540°C. The condenser pressure is 3.4 kPa. Find the cycle thermal efficiency in %. Note: At 13.5 MPa, tsat = 333.88 deg C, Sf = 3.5921 kJ/kg-K, sg = 5.4022 kJ/kg-K.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Example 2: Refrigerant R-134a enter the compressor of a has a refrigerantor a superheared vapor at 0.14MPa and -10°C at arate of 0.05kg/sec and leave at 0.8Mp and 50°C.The refrigerant cooled in the condenser to 26°C and 0.72Mpa is throttled to 0.15MPa.Disregradingany heat transfere and pressure drop in the connecting line between the components. Determine: a) The rate of heat removed from the refrigerated space b) The power input to the compressor. c) Isentropic eff of the compressor d) COP of the refrigerantor.
Thermodyamics Thanks.
An ideal Brayton Cycle has air at 100 kPa and 25C entering the compressor. After the heating process, the air has a max temperature of 870C, and the pressure is 10 times of the initial pressure. Draw the PV and TS diagrams, find the QA, WT, Wc, Wnet and efficiency.
A rankine cycle operates between a pressure limit of 6 MPa. and 50 kPa., the steam leaves the boiler at 450 C, the isentropic efficiency of the turbine is 94%, the steam mass flow rate is 20kg/sec. draw the T-S diagram assuming point 1 is at the pumpe entrance. and determine the required power to operate the pump, cycle thermal efficiency. Ans. (122 kW, 30.25%)
Regenerative Rankine steam power plant operates at boiler pressure of (12.5MPa) and the steam leaves the boiler and enters the turbine at (550°C). Some steam is exerted at pressure of (1MPA) to an open feed water heater. The still steam is continues expanding until condenser pressure of (15kPa). If the plant developed (10MW). Find the mass flow rate of steam in the cycle and the cycle efficiency.
In a R-134a based refrigeration system the cycle operates in the temperature range of 40°c and - 20°c. Find COP of the system if the vapor is dry and saturated .hile entering the compressor. Assume mass flow rate of refrigerant is 1 kg/s.
The net power (NOT TURBINE POWER) of the following steam power cycle is desired to be 25MW.Steam enters the turbine at 16 MPa, 450C, condenser at 10kPa pressure saturated liquid-steamIt enters as a mixture. Compressed liquid enters the pump at 9kPa at 35C and at 17MPacomes out. The inlet pressure to the boiler is 16.8MPa and 33C. The output from the boiler is 16.2MPa and 575C.The isentropic efficiency of the turbine is 90%, and that of the pump is 83%. Find the mass flow rate that will provide the required net power.
Q.6 A vapor compression cycle uses R134a as the refrigerant . The vapor condenses at 40 degrees * C and is subcooled to 35 degrees * C before entering the expansion valve . The evaporating temperature is - 5 degrees * C . The vapor leaving the evaporator is superheated to 5 degrees * C at entry to the compressor . The heat absorption rate is 13 kW and the compression process is isentropic . Calculate (i) the refrigerant flow rate, (ii ) the work input , and ( iii ) the COP . Answers: () 0.0837kg * s ^ - 1 , (ii) 2.63 kW , (iii) 4.95
Steam at 6.2 MPa and 480 deg. C is received by a regenerative engine with ideal conditions and in an ideal cycle. Extractions for feedwater heating occurs at 3 MPa and again at 1.4 MPa, with the remaining steam expanding to 0.0065 MPа. What is the engine work in KW
3. Consider a reheat cycle utilizing steam. Steam leaves the boiler and enters the turbine at 4 MPa, 400°C. After expansion in the turbine to 400 kPa, the steam is reheated to 400°C and then expanded in the low pressure turbine to 10 kPa. Determine the cycle efficiency. Ans. 35.9%
The evaporator (a heat exchanger) in an A/C unit has R-410A entering at -20 °C and a quality of 30% and leaves at the same temperature and a quality of 100%. The COP of the air conditioner is known to be 1.3 and the mass flow rate is given as 0.013 kg/s. Find the power input to the cycle. (Note that, here, the evaporator is the part of the A/C unit that accepts [i.e., withdraws] heat from the room maintained at a cold temperature)
I need the answer as soon as possible