Steam enters the condenser of a steam power plant at 30 kPa, a quality of 91 % and a mass flow rate (m) of 337 kg/min. It leaves the condenser as saturated liquid at 30 kPa. It is to be cooled with water from a nearby river by circulating the water through the tubes within the condenser. To prevent thermal pollution, the river water is not allowed to be heated to a temperature above 5°C. Part A Determine the mass flow rate (rin) of the cooling water. Express your answer to the nearest integer. Vol AEo vec kg/min Submit Request Answer Part B Determine the entropy generation rate (Špen) in the heat exchanger. Express your answer to three significant figures. V AEO ut vec kW/K Submit Request Answer

Steam enters the condenser of a steam power plant at 30 kPa, a quality of 91 % and a mass flow rate (m) of 337 kg/min. It leaves the condenser as saturated liquid at 30 kPa. It is to be cooled with water from a nearby river by circulating the water through the tubes within the condenser. To prevent thermal pollution, the river water is not allowed to be heated to a temperature above 5°C. Part A Determine the mass flow rate (rin) of the cooling water. Express your answer to the nearest integer. Vol AEo vec kg/min Submit Request Answer Part B Determine the entropy generation rate (Špen) in the heat exchanger. Express your answer to three significant figures. V AEO ut vec kW/K Submit Request Answer

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

Chapter44: Geothermal Heat Pumps

Section: Chapter Questions

Problem 1RQ: Geothermal heat pumps, or water-source heat pumps, are classified as either _____loop or _____loop...

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Geothermal heat pumps, or water-source heat pumps, are classified as either _____loop or _____loop systems.
Water vapor with a flow rate of 20000 kg / h enters the condenser of a power plant at a pressure of 20 kPa and a dryness degree of 95 percent. In the condenser, there is heat transfer to the river water flowing through the pipes. The temperature rise of the river water is limited to 10 C to prevent thermal pollution. Since the state of the water at the condenser outlet is saturated liquid at 20 kPa pressure, what should be the flow rate of the cooling water.
Steam enters the condenser of a steam power plant at 30 kPa, a quality of 91 % and a mass flow rate (m) of 337 kg/min . It leaves the condenser as saturated liquid at 30 kPa. It is to be cooled with water from a nearby river by circulating the water through the tubes within the condenser. To prevent thermal pollution, the river water is not allowed to be heated to a temperature above 5°C. Part A Determine the mass flow rate (m) of the cooling water. Express your answer to the nearest integer. Vol AEo In vec kg/min Submit Request Answer Part B Determine the entropy generation rate (Sgen) in the heat exchanger. Express your answer to three significant figures. vec ? kW/K Submit Request Answer 國
An ammonia refrigeration compressor takes its suction from the evaporator, at a temperature of-200F and a quality of 95%. The compressor discharges at a pressure of 100 psi, liquid ammonia leaves the condenser at 500F.(a)Determine the heat absorbed by the evaporator in kJ/kg. (b)Determine the heat rejected to the condenser in kJ/kg. (c)Determine the COP. (d)Determine the horsepower per ton of refrigeration. (e)Determine the quality of refrigerant upon entering to the evaporator
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Water vapor with a flow rate of 20000 kg / h enters the condenser of a power plant at a pressure of 20 kPa and 95% dryness. In the condenser, there is heat transfer to the river water flowing through the pipes. The temperature rise of the river water is limited to 10 ° C to prevent thermal pollution. Since the state of the water at the condenser outlet is a saturated liquid at 20 kPa pressure, what is the flow rate of the cooling water?
1. A deaerator heater supplies 150 L/min of deaerated feedwater into a booster pump at 115 oC pumping temperature. The heater pressure is maintained at 100 kPag by bleed steam. Pump centerline is located 1 m above the floor level. Suction line losses is 0.60 m. Determine the minimum height of water level in the heater that must be maintained above the centerline of the pump to avoid cavitation, if the pump to be installed has a required suction head of 5.8 m.
4. The refrigerant 134-a enters the compressor of a refrigeration machine as superheated vapor at a flow rate of 0.12 kg/s, a pressure of 0.14 MPa, and a temperature of -10 °C. It exits at a pressure of 0.7 MPa and a temperature of 50 °C. The refrigerant exits the condenser at a temperature of 24 °C and a pressure of 0.65 MPa and is then throttled to a pressure of 0.15 MPa. Show the cycle on a T-s diagram, including the saturated liquid and saturated vapor lines. Also, a) Calculate the heat extracted from the environment per unit time and the power required to operate the compressor, b) The isentropic efficiency of the compressor, c) The coefficient of performance of the refrigeration machine. Note: This is a question from the thermodynamics course. Please provide a clear and prompt solution.
Q4l/A// Prove for the condenser: %3D Cpw (Tw2-Tw) when the temperature of cooling water outlet and inlet is equal to saturation temperature of steam and the condensate leaving the condenser respectively; also, the inlet of condenser is dry steam with unity latent heat. てw、
4. Steam enters the condenser of a steam power plant at 20000 kPa and a quality of 95 percent with a mass flow rate of 20 Mg/h. It is to be cooled by water from a nearby river in circulating the water through the tubes within the condenser. To prevent thermal pollution, the river water is not allowed to experience a temperature rise above 10oC. If the steam is to leave the condenser as saturated liquid at 20000 Pa, determine the mass flow rate of the cooling water required
The mass flow rate of the refrigerant in a Single Stage Vapor Compression (SSVC) refrigeration system is 0.015 kg/s and the evaporating and condensing temperatures shall be -20°C and 50°C, respectively. Determine the COP of the system.