Air is used as an ideal Stirling cycle work fluid. At the beginning isothermal, the air is 350K and 200 kPa. As the compression ratio is 5 immersion and a heat of 1600 K is given to the air: a) Thermal efficiency of the cycle, b) Calculating the net work of the cycle per unit mass of air. For air,

Air is used as an ideal Stirling cycle work fluid. At the beginning isothermal, the air is 350K and 200 kPa. As the compression ratio is 5 immersion and a heat of 1600 K is given to the air: a) Thermal efficiency of the cycle, b) Calculating the net work of the cycle per unit mass of air. For air,

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

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1. (pp11-1p150gutay) -The steam supplied to an engine is at 198 N/m² superheated to an engine 300 C. The exhaust pressure is 1.37 N/m². a) Find the theoretical amount of work per kg of steam if the engine works on the Rankine Cycle. b) What would be the steam consumption per HP of an engine working between the above conditions of steam supply and exhaust, and having a relative efficiency of 70 % based on the Rankine cycle.
the back work ratio and the thermal efficiency of the cycle assuming a regenerator with 75 and constant specific heats is used with C0.718 kJ/kg.K and C1.005 kJ/kg.K. Determine expansion. The pressure ratio across cach stage of the compressor and turbine is 3. The air Q2: Consider an ideal gas-turbine cycle with two stages of compression and two stages of kinetic and potential energy changes are negligible. The air standard assumptions are applicable enters cach stage of the compressor at 300 K and each stage of the turbine at 1200 K. The percent effectiveness is used.
An Otto cycle with a compression ratio of 7.5 operates from the suction conditions 14.2 psia, 85 °F. Find the pressure and temperature at the end of compression, a) if cold air (k-1.4) is the working substance, b) if hot air (k-1,32) is the working substance.
An open-cycle gas turbine plant will exhaust into a waste heat boiler which receives 66 0C feedwater. The gas turbine plant produces 2611 kW. Air flow rate is 37 kg/kW-hr. Fuel rate, rf/a = 0.014 kg fuel/kg air. Actual exhaust gas temperature = 483 0 Average exhaust gas Cp = 1.082 kJ/kg.K. Compute the saturated steam at 0.450 MPa that can be produced per hour, assuming that the final gas temperature is 38 0C above the saturation temperature.
Rankine cycle list few reasons why thermal efficiency was so low
yale L 15 A gas power cycle uses air as the working fluid and has two turbine sections as shown in the figare below. The power produced by Turbine I is used to drive the compressor, and Turbine 2 produces output power W. Air enters the compressor with a semperature of 290 K and a mass flow rate of -2 (kgs] (State I); the air exits the compressor at 44SK (State 2). Heat is transferred from a high- temperature thermal reservoir, Ta- 1400 [K), to Heat Exchanger 1 at a rate Q,- The lemperature of the air is raised to 1100 [K] (State 3) as it flows through Heat Exchanger 1. The air enters Turbine I where it is expanded to State 4. The flow then proceeds to Turbine 2 and exits with a temperature of 500 (K] (State 5). Heat is then removed from the air through Heat Exchanger 2 at a rate Q which is rejectod to the low-temperature thermal reservoir, TL-200 (K). (A) Determine the temperature at the inlet to Turbine 2, Te (b) Calculate the power output from Turbine 2, W. (e) Calculate the rate of…
In an Qtto cycle with compression ratio 9, the air pressure at the beginning of the compression process is 95 kPa and the temperature is 27 ° CJhere is a constant volume of 800 kJ / kg heat input into the cycle.In the light of this information, Question 1:Standard air containers (taking into account the change of specific heat with temperature), a) temperature and pressure at the end of heat input into the cycle. b) the net work of the cycle, c) thermal efficiency, and d) Calculate the average effective pressure. Question 2:Cold air standard containers (taking specific temperatures constant), a) temperature and pressure at the end of heat input into the cycle, b) the net work of the cycle, c) thermal efficiency, d) average effective pressure and e) Compared to question 1, the thermal efficiency obtained by taking the specific heats constant was calculated how many% wrong.(Note:The solution gives more accurate results with variable specific heats!) (Cv = 0,718kj / kgK and R = 0,287 kPa.…
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a) List out the methods to improve the efficiency of the Rankine cycle.
QUESTION I Figure 1 shows cylinder block and piston of a reciprocating engine run with diesel fuel. The engine has displacement volume of 3000 cm and has clearance volume. Consider that the engine is a four-cylinder and four-stroke operates on the Diesel cycle with a compression ratio of 18 and cutoff ratio of 2. The pressure and temperature of air is at the beginning of the compression process is dependent on local ambient condition. Using constant specific heats at 500 K: i) decide working condition at the beginning of the compression process and calculate all the working temperature and pressure at all points on P-V diagram for the engine, ii) determine the net work output and the thermal efficiency, iii) determine the mean effective pressure, iv) develop expression of Power (P) as a function of rotational speed (N), and v) plot graph of Power versus Engine speed (RPM) for the above engine from 0 – 4500 rpm. Please provide complete table of Power versus Engine speed. What is the…
4. A simple Brayton cycle with air as the working fluid has a pressure ratio of 12, a compressor inlet temperature of 300 K, and a turbine inlet temperature of 1000 K. If the isentropic efficiencies of the turbine and compressor are a) 100% and b) 85%, calculate the mass flow rate that the air must have for the net power to be 70 MW. (Assume that the specific heats at room temperature are constant)