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REFRIGERATION AND AIR CONDITIONING
Transcript of REFRIGERATION AND AIR CONDITIONING
REFRIGERATION AND AIR-CONDITIONING
(BILIK FIRDAUS 1)
AMIRUL 'ARIFF BIN ABDUL MANAF
AZZAMUDDIN BIN AZZIZUDDIN
MUHAMMAD HADRAMI BIN HAMDAN
MUHAMMAD HARIZ BIN RAHAMAT
LOQMAN HAKIEM BIN SULAIMAN
REFRIGERATION AND AIR CONDITIONING
To making analysis of study room by using
simulation result and analytic analysis
the split unit air cond system used in the room with diffuser
To fulfill the requirement of the subject syllabus (mini project)
Device that lowers the air temperature
Split Unit system, package system and centralise system
Some of the variables are load change, zoning requirement, space availability and cost
Centralised system is used in large installations with variable needs in different zones
Heating, Ventilation and Air Conditioner(HVAC) equipment is located in the basement, on the roof or outside the
An air conditioning
diffuser distributes air
from a home cooling system into each room.
The diffuser fits into the walls or ceiling at the end of the air conditioning duct, and serves as a vent for cooled air to enter the room
In this project, we
a few major characteristics in an air flow.
Which are :
The range of temperature recommended is 64-74°F (18-23 °C)
The temperature difference in the occupied zone shouldn’t exceed environment temperature that is 84°F (29 °C)
Relative humidity levels recommended by different organizations ranges from 40% to 70%.
If the relative humidity greater than 70% causes discomfort to the occupants.
AIR VELOCITY / AIR MOVEMENT
Must include a moving air in the occupied zone.
Still or stagnant air in indoor environments may cause people to feel stuffy.
Besides can cause odour discomfort
Provide clean air, remove odors, controls humidity, for a complete flow of air.
BILIK KOMPUTER FIRDAUS 1
15 Student’s chair
20 Flourescents type lights (4 watts/sq. ft)
3 Wooden doors
6 Glass windows
LIST OF EQUIPMENT
Replace the outlet/exhaust duct to the centre back or centre front of the room.
Ensure the exhaust duct is placed on the edge of a wall to avoid a vortex formation at the outlet.
Reduce the CFM and the temperature of the air conditioner in order to overcome the condensation on the walls and floor.
Rework the placement of the diffusers in order for a better total air distribution for the entire room
Accurate and precise calculations needed to be done in order to achieve the most efficient and ideal air conditioning system.
The locations of the diffusers and exhaust duct are absolutely critical.
The right temperature must be controlled to avoid condensations due to temperature difference between inside and outside.
Boundary conditions, radiative surfaces, surface type, environmental aspects, etc. contributes to the slightest change in the air flow.
VIEW OF ROOM
DIMENSION OF THE ROOM
DIFFUSERS AND EXHAUST DUCT
Cooling Loads - Latent and Sensible Heat
sensible cooling load
refers to the dry bulb temperature of the building and the latent cooling load refers to the wet bulb temperature of the building. In the summer, humidity influence in the selection of the HVAC equipment and the latent load as well as the sensible load must be calculated.
Latent heat load
- humidifying and dehumidifying - and required air volume to keep temperature constant at various temperature differences between entering air and room air are indicated in the
Factors that influence
the sensible cooling load
Glass windows or doors
Sunlight striking windows, skylights, or glass doors and heating the room
Partitions (that separate spaces of different temperatures)
Ceilings under an attic
Floors over an open crawl space
Air infiltration through cracks in the building, doors, and windows
People in the building
Equipment and appliances operated in the summer
COOLING LOAD ESTIMATION TABLE
In order to design the capacities of a heating, ventilating and air-conditioning (HVAC) system's elements, configuration of the building and the HVAC system for minimizing energy consumption, it is very important to know the air-conditioning, heating and cooling load of a building.