FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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2.A steam throttling valve with inlet conditions of 2MPA and 400C is connected to the inlet of the turbine. The turbine has
200kW power output and heat abstracted of 100kW. If the mass flow rate is 1kg/s and the exit temperature of steam is 300C,
find the exit turbine pressure.
2.A steam throttling valve with inlet conditions of 3MPA and 500C
is connected to the inlet of the turbine. The turbine has 800kW power output
and heat absorbed of 500kw. If the mass flow rate is 1kg/s and the exit
temperature of steam is 400C, find the exit turbine pressure. (
In a spray condenser, find the ratio of circulating water to steam flow if the condenser pressure is (0.01 bar), and the cooling tower cools the water to (T=12 "C). Assume turbine exhaust at (86%) quality.
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- If the mass flow rate for air is 5 Kg/s .and air compressor takes in air at 200 kPa, 290 K and delivers it at 1.2 MPa, 600 K to a constant-pressure cooler, which it exits at 300 K. Take cp= 1.005 find 1- temperature exit for compressor is A- 290 K B- 600 K C - 300 K 2- work specific compressor is A- ( -211.55) B- ( -311.55) C- ( -411.55) 3- Specific heat transfer in the cooler is A- 301.5 B- 310.5 C- 320.5 4- Power the compressor is A- 1575.75 B- 1585.75 C- 1895.75arrow_forwardQ 2: - A one cylinders Freon (134a) compressor has a Bore and Stroke 5.4 and 4.8 cm respectively. It is speed 1450 rpm volumetric efficiency c.v 100% working fluid reaches expansion valve at 42°C and the temperature %3D of its suction -8°C:- a- Find the mass flow rate of the refrigerant, heat capacity and COPact& COPtho? b- Find the mass flow rate of the refrigerant, heat capacity and COP & COPtho if the clearance factor will be 5%?arrow_forwardA Brayton cycle has an initial temperature 300C. If compression ratio of compressor is8, find the compressor work in KJ/kg.arrow_forward
- In a spray condenser, find the ratio of circulating water to steam flow if the condenser pressure is (0.07 bar), and the cooling tower cools the water to (18"C). Assume turbine exhaust at (89%) quality.arrow_forward2A steam throttiing valve with iniet conditions of 2MPa and 400C is connected to the inlet of the turbine. The turbine has 200kW power output and heat abstracted of 100KW. If the mass fiow rate is 1kgis and the exit temperature of steam is 300C, find the exit turbine pressure.arrow_forwardInlet Temp is 300karrow_forward
- A turbine engine air intake is at pressure and temperature of air drawn 99 kPa and 29 0C respectively. The maximum pressure and temperature during the cycle is 990 kPa and 888 0C respectively. The adaibatic index as 1.4. After claculations, the pressure ratio of the cycle is , compressor exit temperature is K, turbine exit temperature is K, net specific work output from the gas turbine engine is in k, thermal efficiency is % and work ratio of the cycle is to I decimal placearrow_forwardConsider a 10:1 pressure rise in the ideal compressor with air as the working fluid compared to the a pump with water as the working fluid and the same pressure rise and same inlet pressure. Check all that apply The compreesor takes 300 times more work/unit mass as the pump The work per unit mass is about the same between the two. Becase the pump deals iwth a liquid the work will be higher. The compressor in a Brayton cycle has a much greater effect on performance than a pump in a Rankine cycle.arrow_forwardWater at 55°C is cooled in a The temperature of the surrounding air is from the condenser is 2,300,000 kJ/h. Find the capacity in liters per second of the pump used in the cooling tower. cooling tower which has 32°C dry bulb and 70% RH. an efficiency of 65%. The heat dissipatearrow_forward
- A gas turbine power plant operating on Brayton cycle shown in figure. The air enters the compressor at 300 K and exits at 700 K. The pressure ratio for compressor is 7. The gas enters the turbine at 1600 K, 600 kPa and exits at 1050 K, 100 kPa. Fuel T₂ = 700k. p=7 Compressor T₁ = 300k Fresh air Combustion Chamber Turbine Find Work T3 = 1600 K P3=600 кра Exhaust gas In put work efficiency we net =1050 K P4=100 kPaarrow_forwardThe efficiency of Carnot cycle operating at a maximum temperature of 460 oF is 50 %. Find the minimum temperature of the cycle.arrow_forwardIn an air standard diesel cycle the state before the compression is 100kPa and 300K .A peak pressure of 6000kPa and a maximum temperature of 2400K exist in the cycle. Find the efficiency of the cycle.arrow_forward
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