Business
Engineering
Math
Science
Social ScienceConsider an ice-producing plant that operates on the ideal vapor-compression refrigeration cycle and uses refrigerant-134a as the working fluid. The refrigeration cycle operating conditions require an evaporator pressure of 180 kPa and the condenser pressure of 1400 kPa. Cooling water flows through the water jacket surrounding the condenser and is supplied at the rate of 250 kg/s. The cooling water has a 10°C temperature rise as it flows through the water jacket. To produce ice, potable water is supplied to the chiller section of the refrigeration cycle. For each kg of ice produced, 333 kJ of energy must be removed from the potable water supply. (Take the required values from saturated refrigerant-134a tables.) Determine the mass flow rate of the refrigerant, in kg/s. Take cp of water as 4.18 kJ/kg·K. (You must provide an answer before moving on to the next part.) The mass flow rate of the refrigerant is _________kg/s.
Consider an ice-producing plant that operates on the ideal vapor-compression refrigeration cycle and uses refrigerant-134a as the working fluid. The refrigeration cycle operating conditions require an evaporator pressure of 180 kPa and the condenser pressure of 1400 kPa. Cooling water flows through the water jacket surrounding the condenser and is supplied at the rate of 250 kg/s. The cooling water has a 10°C temperature rise as it flows through the water jacket. To produce ice, potable water is supplied to the chiller section of the refrigeration cycle. For each kg of ice produced, 333 kJ of energy must be removed from the potable water supply.
(Take the required values from saturated refrigerant-134a tables.)
Determine the mass flow rate of the refrigerant, in kg/s. Take cp of water as 4.18 kJ/kg·K. (You must provide an answer before moving on to the next part.)
The mass flow rate of the refrigerant is _________kg/s.
Expert Answer
Refrigerant is R-134a
Evaporator pressure P1 = P4 = 180 kPa
Condenser pressure P2 = P3 = 1200 kPa
Mass flow rate of water mw = 250 kg/s
Rise in water temperature = 10oC
For 1 kg of ice, energy to be removed = hfg = 333 kJ/kg
Process 4-1 shows the production of ice taking place in the evaporator, where 333 kJ of energy is removed for each kg of ice produced.
Process 2-3 shows the cooling of condenser through a water jacket.
From the energy balance equation, the amount of heat removed at the evaporator to produce ice will be equal to the amo...
Engineering
Mechanical Engineering
Related Mechanical Engineering Q&A
Find answers to questions asked by student like you
Show more Q&A addQ: QUESTION 2 A compressor blade design tested in a cascade is found to choke with an inlet Mach number...
A: Refer the compressible flow tables,
Q: Pearson's MyLab & MasteringMasteringEngineering Mastering x+ C https://session.masteringengineering....
A: The velocity of the airplane is constant at point A, the speed is vp = 80 ft/sThe weight of the pilo...
Q: QUESTION 3 A high-pressure axial compressor for a stagnation pressure ratio of 8.5. The mass flow ra...
A: Write the expression for stagnation pressure ratio.
Q: What number would you divide by to calculate the mean of 3, 4, 5, and 6?
A: We can find the mean of “N” numbers by using the following relation:
Q: A steam power plant produces 200 MW of electric power operating on a simple ideal Rankine cycle with...
A: Obtain the properties of water from “Saturated water: Pressure table”, corresponding to the pressure...
Q: Air is compressed steadily by a reversible compressor from an inlet state of 100kPa and 300K to an e...
A: (a)First we have to find the compressor work pressure with isentropic compression with k=1.4
Q: Steam enters a turbine operating at a steady state at a pressure of 4 MPa, at temperature of 400 deg...
A: Write the energy balance equation for the steady flow turbine as given as follows:
Q: The 32-kg spool of outer radius ro 420 mm has a centroidal radius of gyration k 265 mm and a central...
A: Draw the free body diagram of the spool as:
Q: 4. Calculate the pressure difference between the inside and outside of a water droplet with a diamet...
A: Given information:Diameter of the water droplet is d=1/16 in.Temperature of the droplet is T=75FSo w...
