The compressor of a refrigerator using refrigerant R134a draws 1.2 kW. Sincethe evaporation temperature in the evaporator is -22 °C and the condensationtemperature in the condenser is 38 °C; (a) Plot this refrigerator systemschematically with its elements and show it on the T-s and P-h diagram of therefrigeration cycle (b) The cooling power of the refrigerator (c) The amount ofheat the refrigerator gives to the environment (d) Calculate the ideal andCarnot COP cooling values of this refrigerator.

Answered: Image /qna-images/answer/60da181b-e04f-4317-91d4-e01a33e3e8a0.jpg

e evaporation temperature in the evaporator is -22 °C and the condens: nperature in the condenser is 38 °C: (a) Plot this refrigerator system ematically with its elements and show it on the T-s and P-h diagram o rigeration cycle (b) The cooling power of the refrigerator (c) The amour at the refrigerator gives to the environment (d) Calculate the ideal and rnot COP cooling values of this refrigerator.

e evaporation temperature in the evaporator is -22 °C and the condens: nperature in the condenser is 38 °C: (a) Plot this refrigerator system ematically with its elements and show it on the T-s and P-h diagram o rigeration cycle (b) The cooling power of the refrigerator (c) The amour at the refrigerator gives to the environment (d) Calculate the ideal and rnot COP cooling values of this refrigerator.

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

See similar textbooks

Similar questions

A heat pump shown is driven by 2.5 MW motor and receives heat from a source at 80 C and deliver energy to a boiler that operates at constant pressure and saturation temperature of 130 C. The water enters the boiler as saturated liquid and leaves as saturated vapor at the same temperature. The heat pump operates with a COP (coefficient of performance) that is 70% of a Carnot heat pump COP. Find: 1- the maximum mass flow rate of water the system can deliver 2- the heat received from the cold source Q, boiler mwater eb TH V HP 2.5 MW TL=80°C
A refrigeration unit with COP = 3.8 is being used to remove heat from a particular machine by 0.42 kg/s of water (C, = 4.18 kJ/kg.K) at 20 °C that is chilled from 40 °C as shown in the Figure. What is the power input (in kW) to the refrigeration unit? Select one: O 11.15 1 2 10.97 9.24 REF TH O 13.26 QH O 14.63 O 12.32
Explain the condenser coils of a refrigerator must be cleaned periodically, and the airflow passages must not be blocked to maintain high performance.
Thermodynamics. Please help me out A Carnot heat engine is used to power a Carnot refrigerator that operatesbetween 258.15 K and 293.15 K. In the heat engine, water is used as theworking fluid. Heat is added to the water at 473.15 K, where it changes fromsaturated liquid to saturated vapor. Heat is rejected from the heat engine atP=20 kPa and constant temperatue. Calculate(a) The heat added to the water per kilogram of water(b) The amount of heat that must be added to the water so that therefrigerator can remove 1 kJ of heat from the cold reservoir.
ROOM (2) 700kPa x-0 CONDENSER k (1) 40°C 700OkPa EXPANSION VALVE (3) 100kPa EVAPORATOR (4) 100kPa x=1 OUTSIDE Consider a heat pump cycle operating with R134-a fluid at 0.01kg/s mass flow rate. Conditions are given in the figure. a) What are the values of heat supply rate to the room and heat absorption rate from the outside? b) What is COP of this heat pump? c) Assume we immediately put a watermelon of 8kg to the room at 2°C. Assuming a specific heat of 4200J/kg for the watermelon, how long will it take for the watermelon to reach room temperature of 20°C if we assume that heat pump only heats watermelon? CA122.minutes O D112 menute COMP.
Provide complete solution and detailed diagram. A refrigerator is to remove heat from the cooled space at a rate of 300 KJ/min to maintain itstemperature at - 8oC. If the air surrounding the refrigerator is 25oC, determine the minimum powerrequired for this refrigerator? A. 0.263 kw B. 0.473 kw C. 0.623 kw D. 0.984 kw
A refrigeration system is being designed to maintain a small frozen storage room at -5°C. The required cooling rate is 50 kW. Waste heat from the refrigeration system will be rejected to the outdoor air at 35°C. The system will be designed such that the evaporation temperature will be either -10°C or -20°C, and the condensing temperature will be either 40°C or 50°C. UA cond For the 4 possible combinations of evaporator and condenser Tcond temperatures: Apply the "rule of thumb" to estimate the cooling COP Tn Есотp Estimate the required "size" of the evaporator heat exchange Practical Refrig surface, UA vap (W/°C) Estimate the required "size" of the condenser heat exchange surface, UAcond (W/°C) Тevap UAevap Show your work for Scenario A and complete the following table: Design Scenario Tevap (°C) СОР. UA. UA cond (W/°C) Tcond (°C) (W/°C) evap A -10 40 В -20 40 -10 50 -20 50
A 95kg/hr hot fluid is used to heat a cold fluid from 10oC to 70oC using a double pipe heat exchanger (DPHE). The hot fluid enters at 205°C and leaves the DPHE at 108°C. The Cp of hot fluid is 1.10 kcal/kg°C and the Cp of cold fluid 0.95 kcal/kg°C. a) Calculate the LMTD if the the flow is cocurrent in oC b) Calculate the LMTD if the the flow is countercurrent in oC
Bokr Py- 6000 kP Wpampin Pump Turbine P50 kPa Condenser "punpin Figure 2 (b) Determine the thermal efficiency of the cycle in part (a) when the liquid enters the pump 1.3°C cooler than a saturated liquid at the condenser pressure.
In an ammonia refrigeration system, the pressure in the evaporator is 251 kPaa, and the ammonia at the evaporator entry is 0.1511 dry while at exit is 0.95 dryIf the rate of ammonia circulation is 4.56 kg / m * i * n , determine the refrigerating capacity of the system. Use the properties of ammonia from refrigerantstable
B// What are the methods of draught in cooling towers. Demonstrate them with drawings. What is the relationship between the cooling tower and condenser. Q4IIA// Prove for the condenser: %3D + Cow (Tw2-Tw1) 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. Twi 1
In a system one evaporator is to provide 180 kW of refrigeration at -30C and another evaporator is to provide 200 kW at 5C. the condenser temperature is 40C. The system uses 2 – stage compression with intercooling and is arranged as in figure. Calculate the power required by the compressors.