6- 6-A turbine receive steam at 1.38 bar, 0.143 m²/kg internal energy 2590 kJ/kg and 30 m/s. At leaving the condenser are 0.35 bar, 4.37 m²/kg, internal energy 2360 kJ/kg and 90 m/s. Heat is lost to the surroundings at 0.25 kJ/s. If the rate of steam flow is 0.38 kg/s. What is the power developed by the turbine? (102.8kW)

6- 6-A turbine receive steam at 1.38 bar, 0.143 m²/kg internal energy 2590 kJ/kg and 30 m/s. At leaving the condenser are 0.35 bar, 4.37 m²/kg, internal energy 2360 kJ/kg and 90 m/s. Heat is lost to the surroundings at 0.25 kJ/s. If the rate of steam flow is 0.38 kg/s. What is the power developed by the turbine? (102.8kW)

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 12RQ: Refrigerators currently being manufactured in the United States are using______as their refrigerant.

See similar textbooks

Similar questions

Refrigerant-134a enters the compressor of a refrigerator as superheated vapour at 0.20 MPaand 25°C at a rate of 0.07 kg/s, and it leaves at 1.2 MPa and 100°C. The refrigerant is cooledin the condenser to 44°C and 1.2 MPa, and it is throttled to 0.20 MPa. Disregarding any heattransfer and pressure drops in the connecting lines between the components,2.1 Calculate the rate of heat removal from the refrigerated space and the power input tothe compressor,2.2 Calculate the isentropic efficiency of the compressor, and2.3 Calculate the Coefficient of Performance of the refrigerator
Steam turbine receives steam at 9.5 MPa, 540°C and the condenser at 0.01 MPa. Steam are extracted at 3 MPa, 1.8 MPa, and 0.6 MPa. Determine the following: 1. Degree superheat at point 2 2. Quality of steam at point 4 3. Mass extracted in kg/hr for each feedwater open heater and the remaining mass that enters the condenser assuming 20,000 kg/hr of throttle flow 4. Work net in kW 5. Cycle thermal efficiency
A Rankine Engine-Generator unit receives 27,000 kg/hr of steam at 1.2 MPa and 150°C and exhausts to a condenser temperature of 22 C. Brake steam rate is 4.74 kg/kW-hr, mechanical efficiency is 90 % and generator efficiency is 94 %. Determine: a) ideal cycle thermal efficiency, b) indicated engine efficiency, c) generator output (kW), d)the condition of turbine actual exhaust
Refrigerant 134a enters the compressor of a refrigerator as superheated vapor at 0.20 MPa and -5 ° C at a rate of 0.7 kg / s, and exits at 1.2 MPa and 70 ° C. The refrigerant is cooled in the condenser to 44 ° C and 1.15 ° C. MPa, and throttles at 0.2 MPa. Neglecting any heat transfer and any pressure drop in the connecting lines between the components, show the cycle on a Ts diagram with respect to the saturation lines, and determine (a) the rate of heat removal from the refrigerated space and the inlet power to the compressor, b) the isentropic efficiency of the compressor, c) the COP of the refrigerator, d) show the Ts and Ph diagrams with all points
Air enters the compressor of a regenerative gas-turbine engine at 100 kPaand 300 K and is compressed to 800 kPa. The regenerator has aneffectiveness of 65 percent, and the air enters the turbine at 1200 K. For acompressor efficiency of 75 percent and a turbine efficiency of 86 percent,determine(a) The heat transfer in the regenerator.(b) The back work ratio.(c) The cycle thermal efficiency
Refrigerant 134a enters a refrigerator compressor as superheated vapor at 0.20 MPa and -5 ° C at a rate of 0.7 kg / s, and exits at 1.2 MPa and 70 ° C. The refrigerant is cooled in the condenser to 44 ° C and 1.15 MPa, and is throttled to 0.2 MPa. Neglecting any heat transfer and any pressure drop in the connecting lines between the components, show the cycle on a Ts and Ph diagram with respect to the saturation lines, and determine (a) the rate of heat removal from the refrigerated space and the power input to the compressor, b) the isentropic efficiency of the compressor, and c) the COP of the refrigerator
A 60 MW turbine-generator running at 3600 rpm receives steam at 4 MPa 450oC with a back pressure of 10 KPa. Engine efficiency is 78% and combined mechanical electrical efficiency is 95%. Steam properties are as follows: 4 MPa ,450oC : h = 3330.3 KJ/kg, s = 6.9363 KJ/kg-K; 10 KPa: hf = 191.83, hg = 2584.7, sf = 0.6493, sg = 8.1502. Determine the throttle steam requirement in kg/hr.
Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.22 MPa and 27 C at a rate of 0.07 kg/s, and it leaves at 1.2 MPa and 73°C. The refrigerant is cooled in the condenser to 44°C and 1.16 MPa, and t is throttied to 0.21 MPa. Disregarding any heat transfer and pressure drops in the connecting lines between the components, show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the rate of heat removal from the refrigerated space and the power input to the compressor, (b) the isentropic efficiency of the compressor, and (c) the COP of the refrigerator.
The enthalpy entering the turbine of a geothermal power plant is 2750 KJ/kg and ,ass rate of 1 Kg/sec. The turbine brake power is 1000 KW condenser outlet has enthalpy of 210 KJ/kg. If temperature rise of cooling water in condenser is 8, what is the mass of cooling water requirement?
Try to explain why a certain amount of thermal energy rejected intentionally in condensers and pumps are employed instead of compressors in steam power cycles?
Q1/ In simple refrigeration system for residential refrigerator uses R134a, the evaporator temperature is -20C and the condenser temperature is 30C. The refrigerant enters the compressor as saturated vapor (x = 1). If the mass flowrate is 1 kg/s. Determine: 1. Compressor work (w). 2. Rejected heat from the condenser. 3. Refrigeration effect (RE). 4. Coefficient of Performance (COP).
A 1000-MW supercritical double-reheat steam power plant operates withthe main (live) steam condition of 250 bars and 560°C and the condenserpressure of 0.04 bar. The steam is reheated first at 30 bars to 560°C andthen at 4 bars to 560°C. The turbine efficiency is 0.92. The feed pumpwork may be ignored. Calculate: (a) the plant net specific work, (b) the plant thermal efficiency, (c) the plant steam mass flow rate, and (d) the plant heat rate.