Lab Report Aircond

As a conclusion, the Recirculating Air conditioning unit may used to demonstrate and evaluate most of the processes found in practical air conditioning plant, such as heating, cooling, humidification, dehumidification air stream. Sometime two or more of these process are needed to bring air to adesired temperature and humidity level. Various air conditioning processes in psychrometric chart. Notice that simple heating and cooling processes appear as horizontal line on this chart since moisture content of the air remains constant (ω = constant) during this processes. Air is commonly heated and humidified in winter and cooled and dehumidified in summer. Notice how these processes appear on the psychrometric.

INTRODUCTION Air conditioning is the conditioning of air within a defined space, usually a residence or a place of business. Conditioning usually involves heating or cooling, humidifying or dehumidifying, and filtering or cleaning air and controlling its moisture level: conditioning it to provide maximum indoor comfort. An air conditioner transfers heat from the inside of a building, where it is not wanted, to the outside. Refrigerant in the system absorbs the excess heat and is pumped through a closed system of piping to an outside coil. A fan blows outside air over the hot coil, transferring heat from the refrigerant to the outdoor air. It is because the heat is removed from the indoor air, the indoor area is cooled. Air-conditioning is a system giving automatic control of the required environmental conditions, by method of heating, cooling, humidification, dehumidification, cleaning and movement of air in the building,

vehicles

and

others.

These control conditions may be desirable to maintain the health and comfort of the occupants or to meet the requirements of industrial process irrespective of the external climatic conditions.

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There are some advantages of air-conditioning system; Improved working efficiency, reduce stress and absenteeism

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Increased sales, productivity, comfortless

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Less cleaning materials and furniture last longer

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Suitable environment for plants growth, process, electronic and laboratory areas

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Reduce internal and external pollution

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Less risk of fire or damage due to static electricity caused by dry air

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Factors of choosing type of system are; Size volume

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Usage

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Arrangement of room, buildings

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Building materials-heat retained

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Water or air fir releasing heat from condenser

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Noise level of system used

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Reliability, installation, cost and maintenance

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Flexibility or user friendly

OBJECTIVE To examine the air conditioning performance with regarding to the requirement 24'C of in a building temperature

1.

APPARATUS: Thermometer

2.

Relative Humidity (RH) Meter

3.

Measurement tape

METHODOLOGY: 1.

A room is selected

2.

The different thermometer is placed at the different location with the same distance each other.

3.

The measurement tape is used to measure the distance

4.

The reading of temperature and relative humidity of the room is taken for different time by different group

5. 6.

The data is gathered and the result is compiled. The result then is analyzed to examine the performance of the temperature and relative humidity of the room

DISCUSSION For this experiment, we have chosen the building services laboratory 1 as our location. 12 thermometers have been placed in 12 different positions such as at the fluorescent lamp, airconditioning inlet, air-conditioning outlet, and sprinkler and also outside the laboratory. The distance of all thermometers is same. The readings of 12 thermometers are taken for every 1 hour time interval.

The experiment we have done shows that the two different graphs of average temperature and temperature obtained from logger meter. In overall, at 10 11 am, the average temperature taking from thermometer at 12 different positions and the reading of logger meter is the highest value by 23.68 and 22.20 respectively.

From the both graph, we can see both are obviously different. It may because of the present of some error during taking the reading of thermometer. The person who taking the thermometer reading may

not in proper condition such as his eyes may not perpendicular to the point of view (parallax error). Parallax error will cause inaccurate reading of thermometer.

Besides that, different data collector may differ the way the reading is taken. As the thermometers are hanging up manually by a person, the distance may not the same. It is also can affect the reading of the thermometer. It is because the further distance the lower temperature.

CONCLUSION From the experiment that we have done, we can get know about the air conditioning system. Usually, split unit system will be used to almost building. In split unit system, the compressor will be installed outside the building. There are usually used to heat and cool one or more rooms, or an open-plan area, of up to 60m^2.

Different place may install the different types of air conditioner system. For example, a ducted system is usually installed in the roof or outside on the ground, and ducted to air outlets throughout the building. For this building that we have observed along this experiment, the ducted system has been used as the building is very big.Split unit system is not efficient to install in the multi-level building.

Therefore, the experiment is successful as the result is accepted by the requirement of 24'C for a building. Although the temperature obtained from this experiment is not exactly 24'C, but the value is approaching the requirement 24'C.

RECOMMENDATION 1.

The air conditioning system must be checked regularly by scheduled maintenance.

2.

The air conditioner must be installed in a building by the suitable system.

3. 4.

The eyes must be perpendicular to the point of view during taking the reading of thermometer. Take the reading at least three times for the best results.

REFERENCES 1.

Building Services and Equipment, Second Edition

2.

Building Services ECM 216 Text Book

3.

Electrical and mechanical engineering notes (ECM436)

4.

http://www.aelag.com.au/air-conditioning-type