Short Answer
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1.
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Define net refrigeration effect (NRE).
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2.
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What is the term used to describe the change of 30 % of the liquid to vapor at
the outlet of the metering device and in which no enthalpy is removed from the system but is removed
from the remaining liquid?
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3.
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In the diagram in Figure 3.48, what is the enthalpy content of the refrigernt as
it begins traveling through the evaporator?
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4.
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What is the heat content of the refrigerant as it leaves the evaporator at point
C in Figure 3.48?
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5.
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What is the net refrigeration effect for the system in Figure 3.48?
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6.
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What part of the system is absorbing heat between point C and D and how
much heat is absorbed there?
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7.
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What is the approximate temperature of the refrigerant at point C?
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8.
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What is the approximate (a) temperature and (b) pressure (psig) at point
D?
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9.
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What component of the refrigeration system is the refrigerant entering at point
D?
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10.
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What does the line sloping up and to the right leaving point D mean as far as
(a) enthalpy, (b) pressure (c) temperature and (d) volume are concerned?
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11.
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Where is the refrigerant in the system when it is at point E?
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12.
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How much total heat has been picked up by this system and must be rejected by
the condenser (total heat of rejection)?
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