Difference between Ideal and Real Vapour Cycle

Laboratory report 1
LABORATORY REPORT
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Laboratory report 2
Introduction
The main objective of conducting this lab and the experiment is to know the difference
that is there between the ideal and real vapour cycle. For a full understanding of this experiment
and to achieve the aims measurement of heat pumps cycles and real refrigeration are recorded
then a keen comparison is done to the theoretical results data. The heat pump is employed since
it has the same operational concept as the refrigerator which is the transfer of heat energy from a
low temperature to higher temperature (Kakaç, 2012). A refrigerator has four main parts that are
a condenser, a compressor, an evaporator and expansion valve. Primarily the evaporator will heat
the refrigerant with equal heat to enable it to change the fluid (refrigerant) state to saturated
vapour from saturated liquid.
Thereafter the refrigerant will move to the compressor when in gaseous form and it will
then be compressed to the pressure of the condenser. It will hence leave the compressor at a
higher temperature, cools down and then condenses while it flows in the coil of the condenser
through removing heat energy to the environment (McBrewster, 2010). Lastly, it will move to
the capillary tube a place where its temperature, as well as pressure, reduces significantly
because of the effects of the throttling. There will be low temperature in the refrigerant then the
low temperature will flow to the evaporator, at the evaporator, it will evaporate through
absorbing heat energy from the refrigerant space. The above-explained cycle is very complete
since the refrigerant leaves the evaporator and enter again in the compressor.
During the experiment, the Pressure and the temperature of the refrigerant are recorded
before and after entering every part and this will permit the hypothetical outcomes to be obtained
by a means of standard P-h graphs for the refrigerant (Silberstein, 2013). At the same time,
another strategy is employed to record the power of every device, generally using a watt meter

Laboratory report 3
that permits genuine measurements to be gotten (Wohlfarth, 2015). The most finding is the
practical outcomes realistic presumption like heat transfer in isothermal and isentropic
compression are employed to make calculations simpler.
RESULTS
i. H1 is recorded by means of a horizontal line being sketched at 1.5 bar pressure while the
measurement of the enthalpy value where these lines meet with a line of saturated vapour
at a100C.temperature.
ii. The sloping line moving via the first point of meeting is employed to obtain H2 that is the
next crossing point with the flat line of a pressure 8. 5 bar.
iii. H3 is recorded through measuring the point of crossing which is 8. 5 bar horizontal line
intersected with the liquid curve at saturated state.
iv. H3=H4 due to the effects of throttle which reduces the pressure at perpetual enthalpy.
v. H2 is recorded through the protracted 400C line to saturated vapour curve right side and
then measuring the enthalpy, this is the point where line intersected with 8. 5 bar
horizontal line.