Study of refrigeration and air condition unit lab report

The mass of water loss by air is the amount of water that is converted from steam to water and mass of condense is the amount of water obtained from the condensation process.

coefficient of performance lab report

In capillary the fall in pressure of the refrigerant takes place not due to the orifice but due to the small opening of the capillary. Refrigeration Defrost Heater consists of ni-chromium resistance wire, neoprene lead wire, and standard sheath materials.

Thus, the temperature will be affected.

Refrigeration lab report abstract

Then the steam passes the evaporator where it acts as a cooling coil, causing heat from the steam is extracted. This result can be justified by saying that the refrigerant has low pressure when it passes the evaporator. However, when calculating the heat gained, work done is considered as zero. The air conditioner used in this system is the PA Hilton model. Sometime a capacitor used in series with starting coil for motor starting. Based on the data in the table, it can be said that when temperature increases, the pressure increases. The liquid Refrigerant contained within the evaporator is boiling at a low-pressure. The psychometric chart enables us to determine quantities such as enthalpy, specific volume, relative humidity, absolute humidity and even the dew point temperature of the refrigerant. Their internal bore and length are part of the refrigerator design and cannot be replaced with just any cap tube one might have. That quantity is the mass of flow in the system. As a result, the temperature of air would be much cooler when it leaves the evaporator. The condenser discharges the latent heat of refrigerant. This is because when the refrigerant enters the evaporator, the temperature of the evaporator is greater than the refrigerant.

The pre-heaters are switched on to give 1 kW nominal heating. This may affect the results of the experiment. It is observed that the heat lost is much greater than the heat gained. Before the air from the evaporator leaves the system, it passes through an orifice. Similarly, it also can be seen that the air conditioning system also obeys the conservation of mass principle.

However, when analyzing these three forms of energy, there is another important quantity that needs to be considered.

Air conditioning cycle

This particular model works with humid air and also Ra tetrafluoroethane refrigerant. A frosted dryer or frost on the cap tube at the outlet of the dryer indicates a partially clogged dryer that needs to be replaced. Due to the difference in temperature between the sub-cooled refrigerant and the surrounding of the evaporator, the refrigerant undergoes evaporation where it changes state to become superheated. Figure 1: Schematic diagram of the air conditioning unit used in the experiment. Figure 5: Describes the cooling process of the air from the boiler. Almost all are attached to the suction line for much of their length. Not only that, there are many other errors that may have contributed to the difference in energy as stated later on in this discussion. Thus, it can be said that the air passing through the evaporator also loses thermal heat energy and undergoes condensation. This provides protection to the capillary tube which can become clogged and block the flow of liquid refrigerant to the evaporator. It turns out that this heater works extremely well. This statement is proven in Table 4, where the specific humidity of air at position B is greater than specific humidity of air at position C.

As the refrigerant leaves the evaporator, although it is superheated state, the refrigerant still has low pressure and saturation temperature. So at that instant, the refrigerant is actually absorbing heat from the surrounding in the evaporator.

The liquid refrigerant then flows from the condenser in to the liquid line. This is said as such because by using this chart, just by knowing two variables dry and wet bulb temperaturesother property of the fluid such as specific volume, specific humidity and many more can be determined.

Performance analysis of air conditioning test rig

From the diagram plotted, the value for h1, h2 and h4 are obtained. However, the water heater data decreases slightly. The use and manufacture of R11 and similar CFC refrigerants is now banned within the European Union even for servicing. This is one situation where piercing-valves and manifold gauges are necessary to be certain. Thus the capillary tube is designed for certain ambient conditions. At the end of the process, the warmed gas is drawn toward the compressor. The procedures are repeated to give 2 kW heating, which is the lower water heater. For the air cycle, water initially is boiled using a boiler. Since the air is cooled and dehumidified while passing past the evaporator, the rate of heat and moisture removal can be determined. The condenser discharges the latent heat of refrigerant. Then the steam passes the evaporator where it acts as a cooling coil, causing heat from the steam is extracted. However, there are a few important assumptions that need to be taken into account. However, due to errors and heat lost to surrounding, the heat lost by air through conduction is not equal to the heat gain by the refrigerant through evaporation. Such errors can be reduced by repeating the whole experiment a few times and also regularly maintaining the AC unit so that it will be in a good condition. For this experiment, the uncertainty is calculated using a method called Kline-McClintock Method.

This may be clamped to pipes or tanks to promote drainage and prevent freezing.

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