Mechanical EngineeringThermodynamicsTopic: Refrigeration Cycles 1. Describe the four processes which make up the ideal vapour compression cycle.2. Discuss the differences between a reversed Carnot cycle and a vapour compression cycle,in the context of refrigeration systems. Your answer should explain why a reversed Carnotcycle is not a realistic model for refrigeration cycles.3. An engineer is designing a refrigeration system. Discuss the main considerations whichshould be taken into account when selecting which refrigerant to use.4. Discuss the advantages and disadvantages of air-source, ground-source and water-sourceheat pumps.

Vapour Compression Refrigeration Cycle works on the principle of Rankine Cycle having 3 reversible…

Answered: 1. Describe the four processes which…

Engineering

Mechanical Engineering

1. Describe the four processes which make up the ideal vapour compression cycle.

Elements Of Electromagnetics

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Question

Mechanical Engineering
Thermodynamics
Topic: Refrigeration Cycles

1. Describe the four processes which make up the ideal vapour compression cycle.
2. Discuss the differences between a reversed Carnot cycle and a vapour compression cycle,
in the context of refrigeration systems. Your answer should explain why a reversed Carnot
cycle is not a realistic model for refrigeration cycles.
3. An engineer is designing a refrigeration system. Discuss the main considerations which
should be taken into account when selecting which refrigerant to use.
4. Discuss the advantages and disadvantages of air-source, ground-source and water-source
heat pumps.

Science that deals with the amount of energy transferred from one equilibrium state to another equilibrium state.

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Step 1 Processes used in the Ideal Vapour compression cycle.

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Step 2 T-s diagram of VCRS cycle.

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For the NH3/H2O cycle the following relationship give the solution flow rate per unit refrigeration rate: WFS_A * X - WFS_G(X-1) = 1 where WFS_A = mass fraction of NH3 in solution form the absorber WFS_G = mass fraction of NH3 in solution from the generator X-1 =mass of solution from the generator per unit mass of refrigerant flow For large systems, a reasonable pressure drop between the evaporator and absorber is 1.5 psi Consider a large NH3/H2O plant operating per the schematic below: Known/given: i. Refrigeration load = 500 tons ii. Evaporator temperature (state point 10) = 41.1 F iii. Evaporator pressure (state point 10) = 75 psia iv. Absorber pressure (state point 11) = 73.5 psia (per rule of thumb above regarding pressure drop between the evaporator and absorber) v. Strong aqua solution temperature (state point 3) = 105 F vi. Condenser temperature (state point 8) = 100 F vii. Condenser and tower pressure (state point 7) = 211.9 psia viii. Concentration split, WFS_G - WFS_A =6%…
Please only answer question 4 Parts C and D
9) What is the refrigeration effect?A: It is the energy transfer per kg of refrigerantB: It is the energy transfer per oC of refrigerantC: It is the energy reject per kg of refrigerantD: It is the energy reject per oC of refrigerant
For the NH3/H2O cycle the following relationship give the solution flow rate per unit refrigeration rate: WFS_A * X - WFS_G(X-1) = 1 whereWFS_A = mass fraction of NH3 in solution form the absorberWFS_G = mass fraction of NH3 in solution from the generator X-1 =mass of solution from the generator per unit mass of refrigerant flowFor large systems, a reasonable pressure drop between the evaporator and absorber is 1.5 psiConsider a large NH3/H2O plant operating per the schematic below: Known/given:i. Refrigeration load = 500 tonsii. Evaporator temperature (state point 10) = 41.1 Fiii. Evaporator pressure (state point 10) = 75 psiaiv. Absorber pressure (state point 11) = 73.5 psia (per rule of thumb above regarding pressure drop between the evaporator and absorber)v. Strong aqua solution temperature (state point 3) = 105 Fvi. Condenser temperature (state point 8) = 100 Fvii. Condenser and tower pressure (state point 7) = 211.9 psiaviii. Concentration split, WFS_G - WFS_A =6% by weight…
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