EXPERIMENT NO.
5
AIR CONDITIONING TEST RIG
NAME 1. Cacapit, Janderick Morriz DATE PERFORMED: SCORE:
2. Evangelista, John Andrew October 4, 2019
3. Khokhar, Arslan Ahmed DATE SUBMITTED:
4. Navero,Kevin Paul October 20, 2019
INSTRUCTOR:
SECTION 57037
Engr. Basil Aloysius Bautista
I. OBJECTIVE:
1. To learn the operating process of air conditioning through ACL.
2. To be familiarized with the components of ACL.
3. To determine the functions of each component
4. To draw the gasoline engine test rig using solid works.
II. LEARNING OUTCOME (LO):
The students shall be able to:
1. Interpret data and relate result to governing scientific principle.
2. Develop professional work ethics, including precision, neatness, safety and
ability to follow instruction.
3. Be familiarized with the air conditioning process.
III. DISCUSSION:
Air-conditioning, the control of temperature, humidity, purity, and motion of air in an
enclosed space, independent of outside conditions.
An early method of cooling air as practiced in India was to hang wet grass mats over
windows where they cooled incoming air by evaporation. Modern air-conditioning had its
beginnings in the 19th-century textile industry, in which atomized sprays of water were used for
simultaneous humidification and cooling.
The design of air-conditioning systems takes many circumstances into consideration. A
self-contained unit, described above, serves a space directly. More complex systems, as in tall
buildings, use ducts to deliver cooled air. In the induction system, air is cooled once at a central
plant and then conveyed to individual units, where water is used to adjust the air temperature
according to such variables as sunlight exposure and shade. In the dual-duct system, warm air
and cool air travel through separate ducts and are mixed to reach a desired temperature. A
simpler way to control temperature is to regulate the amount of cold air supplied, cutting it off
once a desired temperature is reached. This method, known as variable air volume, is widely
used in both high-rise and low-rise commercial or institutional buildings.
Distribution of air is a concern because direct exposure to the cool air may cause
discomfort. In some cases, cooled air needs to be slightly reheated before it is blown back into a
room. One popular method of distribution is the ceiling diffuser, from which air is blown out along
the ceiling level and allowed to settle down. The linear diffuser brings air through a plenum box
or duct with a rectangular opening; louvers divert the down-flowing air. Other units are circular,
and their fins radiate the air. Some ceilings are perforated to allow passage of cool air, and other
ceilings are simply cooled so that basic ventilation can circulate the cool air.
Figure 1 Air Conditioning Process
In a simple air conditioner, the refrigerant, in a volatile liquid form, is passed through a
set of evaporator coils across which air inside the room is passed. The refrigerant evaporates
and, in the process, absorbs the heat contained in the air. When the cooled air reaches its
saturation point, its moisture content condenses on fins placed over the coils. The water runs
down the fins and drains. The cooled and dehumidified air is returned into the room by means
of a blower.
In the meantime, the vaporized refrigerant passes into a compressor where it is
pressurized and forced through condenser coils, which are in contact with outside air. Under
these conditions the refrigerant condenses back into a liquid form and gives off the heat it
absorbed inside. This heated air is expelled to the outside, and the liquid recirculates to the
evaporator coils to continue the cooling process. In some units the two sets of coils can reverse
functions so that in winter, the inside coils condense the refrigerant and heat rather than cool
the room. Such a unit is known as a heat pump.
Figure 2 Air Conditioning Test Rig at Adamson University
IV. MATERIALS AND EQUIPMENT:
MATERIALS:
1. Air Conditioning Test Rig
2. Tape measure
3. Solidworks
V. PROCEDURE:
Safety Procedures:
Since safety is the most important, the following procedure are the safety measures which
have been practiced upon conducting the experiment:
1. Never perform unauthorized work, preparations or experiments.
2. Use only the required materials for the experiment to prevent damage and
malfunctions.
3. After the experiment return the apparatus and equipment used during experiment.
Experiment Procedures:
1. Listen to the laboratory technician as he discusses the operation of air conditioning, its
components and the do’s and don’ts in the operation.
2. Measure the components of air conditioning test rig components to be used in drawing
through SolidWorks.
VI. DATA AND RESULT: ARS AND JD
SOLIDWORKS (BUO) WITH LABEL
SOLID WORKS KADA COMPONENT
Functions of each part: ANDREW
------------------------------
Operation of Air Conditioning Test Rig
1. Check water level in the boiler sight glass, if not at level, refill the boiler to the midpoint of
the sight glass.
2. Switch on the main power supply.
3. Switch on the condenser fan and the blower.
4. The speed of the blower can be regulated by turning the speed control knob.
5. Follow the procedure stated in the experiment manual as per laboratory exercise to be
conducted.
6. When shutting down the apparatus, switch off all components that on the ON position
before switching OFF the main power supply.
7. If any of the components of the apparatus fail to run, perform these steps:
a. Do step no.5
b. Inform the laboratory technician/instructor.
