1. A refrigerant system using refrigerant 22 is to have a refrigerating capacity of 60 kW. The evaporating temperature is -10°C and the condensing temperature is 42°C. Determine the:• Enthalpy at each point of the cycle in kJ/kg• Refrigerating Effect in kJ/kgCompressor work in kJ/kg• Energy rejected in kJ/kg• Mass flow rate of refrigerant in kg/s• Compressor power in kW• Heat rejected in kW• Coefficient of PerformanceNote: Draw the P-h Diagram with labels. Show your system balancing for checking.

Given:Refrigerant=R22Refrigerating capacity, Q˙e=60 kWEvaporating temperature, Te=-10oCCondensing…

Answered: A refrigerant system using refrigerant…

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 two-stage refrigeration system operates with ammonia refrigerant flowing at the rate of 15 kg/min through the evaporator. The saturation temperature in the condenser and evaporator units have been noted to be 40⁰C and - 15⁰C respectively. If the system has intercooling by liquid refrigerant at 4.25 bar, determine (a) The capacity and COP of the system. (b) How will these parameters be affected if the compression is carried out in a single stage unit ; the operating temperature limits remaining the same? Use the p-h chart and property tables for saturated ammonia refrigerant
A manufacturer conducted an experiment for an evaporator capacity 548.8 kW cooling. Enthalphies of the refirgerant and solution are found to be: -144 solution leaving the Absorber -535.27 solution leaving the Generator 3256.50 refrigerant generated 167.93 refrigerant leaving the Condenser 2549.76 refrigerant absorbed determine: Mass flow of the refrigerant in kg/s Answer in four decimal places.
2. A refrigeration system using R-12 is to have a refrigerating capacity of 60 kW. The evaporating temperature is 10°C and the condensing temperature is 42°C. Determine (a) the volume flow rate of refrigerant at inlet to the compressor, (b) the power required by the compressor, and (c) the fraction of vapor mixture at entrance to the evaporator expressed both on a mass basis and volume basis.
The catalogue for a refrigerant 22, four-cylinder, hermetic compressor operating at 29 r/s. a condensing temperature of 40 °C and an evaporating temperature of -4 °C shows a refrigeration capacity of 96.4 kW. At this operating points the motor (whose efficiency is 90 percent) draws 28.9 kW. The bore of the cylinders is 87 mm and the piston stroke is 70 mm. The performance data are based on 8 °C of subcooling of the liquid leaving the condenser. Compute 3.1 the actual volumetric efficiency and 3.2 the compression efficiency.
5. A refrigerator with tetrafluoroethane as refrigerant operates with an evaporation temperature of 247.15 K (-26°C) and a condensation temperature of 300.15 K (27°C). Saturated liquid refrigerant from the condenser flows through an expansion valve into the evaporator, from which it emerges as saturated vapor. (a) For a cooling rate of 5.275 kW, what is the circulation rate of the refrigerant? (b) By how much would the circulation rate be reduced if the throttle valve were replaced by a turbine in which the refrigerant expands isentropically? (c) Suppose the cycle of (a) is modified by the inclusion of a countercurrent heat exchanger between the condenser and the throttle valve in which heat is transferred to vapor returning from the evaporator. If liquid from the condenser enters the exchanger at 300.15 K (27°C) and if vapor from the evaporator enters the exchanger at 247.15 K (-26°C) and leaves at 294.15 K (21°C), what is the circulation rate of the refrigerant?
a. Sketch the process on a P-V diagram b. Determine the rate of heat transfer from Boiler ( Qcv/m 1-2, in KJ/kg) c. Determine the rate of heat transfer from condenser ( Qcv/m 3-4, in KJ/Kg) d. Using the Clausius inequality to determine if the cycle is internally reversible, irreversible, or impossible. e. Determine the thermal efficiency of power cycle f. Determine the maximum thermal efficiency of power cycle ( Carnot Efficiency) g. Due to part (e & g) this cycle is___________ ? - internally reversible -internally irreversible -impossible
1) 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.
Refrigerant 22 is the working fluid in a Carnot vapor refrigeration cycle for which the evaporator temperature is -30°C. Saturated vapor enters the condenser at 36°C, and saturated liquid exits at the same temperature. The mass flow rate of refrigerant is 10 kg/min. Determine the rate of heat transfer to the refrigerant passing through the evaporator, in kW, (A) 22.4 B 23.3 26.12 (D) 24.4
There are removed 3.06 m^3 /s of vapor from the water evaporator of a vacuum refrigeration system: thewarm water enters the evaporator at 18 o C and chilled water leaves at 10 o C, make-up water enters at29 o C. Determine the refrigerating capacity
Refrigerant 22 is the working fluid in a Carnot vapor refrigeration cycle for which the evaporator temperature is 0ºC. Saturated vapor enters the condenser at 40ºC, and saturated liquid exits at the same temperature. The mass flow rate of refrigerant is 3 kg/min. Determine(a) the rate of heat transfer to the refrigerant passing through the evaporator, in kW.(b) the net power input to the cycle, in kW.(c) the coefficient of performance.
Q1) Steam is supplied to a turbine at 30 bar and 350°C. The turbine exhaust pressure is 0.08 bar. The main condensate is heated regeneratively in two stages by steam bled from the turbine at 5 bar and 1.0 bar respectively. Calculate masses of steam bled off at each pressure per kg of steam entering the turbine and the theoretical thermal efficiency of the сycle. 1 kg Turbine 1- m- m2 0 1- m, 1- m,-m2 m. h, m2. h2 Condenser 1 kg twwww www meel 1 kg Heater-1 Drain cooler m, m,+ m2 (Н.P.) Heater-2 (L.P.)
A single effect evaporator was used to concentrate 10000 kg / hr of tomato juice from 5% total solids to 30% total solids. The juice enters the evaporator at 25 ° C. The evaporator is operated on Steam (85% quality) at 143.27 kPa. The vacuum in the evaporator allows the juice to boil at 75 ° C. The specific heat of the dilute material is 4.1 kJ / (kg ° C) and the concentrate product is 3.1 kJ / (kg ° C). a. Steam demand rate = kg / hour. b. Steam economy when condensate temperature is released at 75 ° C. = (kg of water evaporated / kg of steam)

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS