Answered: The refrigeration capacity of the…

The refrigeration capacity of the following vapor-compression refrigeration cycle is: Condenser Expansion valve Compressor Evaporator State 1 2s 2 * h (kJ/kg) 230.2 245.1 249.3 82.5 82.5

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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A vapor-compression refrigeration cycle with Refrigerant 134a as the working fluid operates with an evapo-rator temperature of 50◦F and a condenser pressure of 180 lbf/in2Saturated vapor enters the compressor. Refrigerantenters the condenser at 140◦F and exits as saturated liquid. The cycle has a refrigeration capacity of 5 tons (a) the refrigerant mass flow rate, in lb/min. b) the compressor isentropic efficiency. (c) the compressor power, in horsepower. (d) the coefficient of performance.
In the vapor compression refrigeration system, sub cooling in the condenser; increase the refrigeration cost of the system. O decrease the (COP) of the system. O increase the (COP ) of the system. O decrease the pressure.
Refrigerant-134a is used in a heat pump operating according to an ideal cycle with vapor compression. The flow rate of the refrigerant is 0.32kg/s. Condenser and evaporator pressures are 900kPa and 200kPa, respectively. Calculate a) the heat given to the hot environment from the cycle, b) the volumetric flow rate of the refrigerant at the compressor inlet, c) the heating efficiency coefficient.
4. The values of a vapor compression refrigeration cycle were given below. Calculate the values of refrigerant flow rate, refrigeration capacity, and the COP of the system. T1= Evaporator water outlet = 10 °C T2= Evaporator water inlet = 16 °C T3= Condenser water inlet = 16 °C T4= Condenser water outlet = 22°C Cooling water flow rate = 1.5 L/min Heating water flow rate = 1.5 L/min Enthalpy of R134a in evaporator outlet = 305 kj/kg, Enthalpy of R134a in evaporator inlet =115 kj/kg Enthalpy of R134a in condenser inlet =327 kj/kg
Required information Refrigerant-134a enters the condenser of a steady-flow Carnot refrigerator as a saturated vapor at 65.0 psia, and it leaves with a quality of 0.05. The heat absorption from the refrigerated space takes place at a pressure of 30 psia. Determine the coefficient of performance. (Round the final answer to three decimal places.) The coefficient of performance is
The figure shows a two-stage, vapor-compression refrigeration system with two evaporators and a direct contact heat exchanger. Saturated vapor ammonia from evaporator 1 enters compressor 1 at 12 lbf/in² and exits the compressor at 46 lbf/in². Evaporator 2 operates at 46 lbf/in2, with saturated vapor exiting at state 8. The condenser pressure is 200 lbf/in2, and saturated liquid refrigerant exits the condenser. Each compressor stage has an isentropic efficiency of 80%. The refrigeration capacity of each evaporator is shown on the figure. Step 1 -5 Expansion A valve +6 -7 Evaporator Expansion valve Qout Condenser Compressor 2 Qin,2 = 10 tons 8 Evaporator Compressor Direct contact heat exchanger in,1 = 5 tons W₁₂
2. An R22 standard refrigeration system carries a refrigerating load of 82 kW. The suction and discharge pressures of the compressor are 354.3 kPa and 1460.1 kPa respectively. The liquid refrigerant is subcooled by 4° before entering the expansion valve and the vapor is superheated by 5° before entering the compressor. The twin- cylinder, single-acting efficiency, 82%; clearance volume, 6%; and mechanical efficiency, 78% compressor operates at 1680 rpm; stroke-to-bore ratio, 1.20; actual volumetric Determine (a) mass flow rate of refrigerant in kg/s (b) mass flow rate of refrigerant per ton of refrigeration in kg/s-ton (c) work on compressor in kW
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Can you also show the T-s and P-h diagrams? A Single Stage Vapor Compression (SSVC) refrigeration system has a cooling capacity of 6 tons. The discharge of the evaporator is at -20°C & 0.1 MPa and the discharge of the condenser is at 30°C & 1.0 MPa. Determine the following: (a) the COP of the system, (b) the Energy Efficiency Ratio in kJ/hr/W, (c) the HP/ton of the system, (d) the Refrigerating Efficiency of the system.
42. Refrigerant-12 enters the condenser of a vapor-compression refrigera- tion system at 175 psia and 140°F and leaves as saturated liquid at 120°F. Mass flow rate of the refrigerant is 4.8 lbm/min. The heat is rejected to the surrounding air, which is at 90°F. Determine: (a) Heat rejection rate, Btu/hr. 22 (b) Separate the overall entropy changes per hour (Freon and sur- roundings). 23/
Subject Thermodynamics. Instructions: Don't round off in the process. Just round off in the final answer with 2 decimals only. Use 273.15 K to convert Celsius to Kelvin
K2 please help with my reviewer. Provide me the full solution and answer thank you SN=40