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Comparison Of Fuel Consumption
Between Air Conditioning System On
and Off in Steady State Condition
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Introduction
Literature Review
Methodology
Expected Result
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To determine fuel efficiency of a car in difference
approaches.
Approaches include :- Air conditioning on
windows close.
Windows open
Air conditioning off
windows close.
Windows open
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There has been an argument among the
automotive enthusiast that is more efficient to use
air conditioning off and windows open compareto air conditioning on and windows close.
So it is an opportunity to determine which
combination of approaches deliver optimum
efficiency.
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Type Of car
Compact(Perodua Kancil MT)
Engine Capacity
660cc
Driving Condition
Single driver, 60 km/h, highway
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Air Conditioning (A/C)
A/C is a system that convert heat air into cool air.
This system is work by compressing the refrigerantinto high pressure in a liquid form, than by using a
valve it will convert it to low pressure in a gas form.
When the compressor is on, it will use the power from
the engine, this will cause the engine consume morepower, thus will effect the fuel consumption of the
engine.
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ENGINECapacity 659 CC
Bore and stroke 68/60.5 mm
Compression ratio 9.5:1
Cylinder 3, in-line
Valve arrangement Sohc, 2 valve per cylinder
Cylinder head Light alloy
Cylinder Block Cast Iron
Fuel Feed Single carburetor
Petrol Unleaded onlyMax. Power 31bhp / 6400 rpm
Max Torque 49Nm / 3200 rpm
Catalytic Converter No
Source : www.perodua.com.my
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Odometer
3 litter of fuel
Perodua kancil 660 MT
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The project is conducted by using a spark
ignition internal combustion 3 cylinder-
L200(NA) engine from perodua. Pour 3 litters of fuel in the fuel tank.
Run the vehicle until the engine stop.
Measure distance base onboard odometer.
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ProposalDesign of
Experiment
Experiment
setup
Running of
experiment
Data
acquisition
Data
analyzation
Documentation
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Task
Week
1
Week
2
Week
3
Week
4
Week
5
Week
6
Week
7
Week
8
Week
9
Week
10
Week
11
Week
12
Week
13
Week
14
design of
experiment
Experiment
setup
Running
Experiment
Data acquistion
Data analysis
Documentation
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1. AC on
2. AC off
3. Windows open4. Windows close
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AC on AC off
Windows open
Windows close
Experiments will be conducted in three (3)
repetition times for each combination ofvariable inputs.
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No of test Windows Air Conditioning Result (Km)
Test 1 Close On 32
Test 2 Open On 31
Test 3 Close Off 32
Test 4 Open Off 31
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0
0.5
1
1.5
2
2.5
3
3.5
5 km 10 km 20km 32km 40km
test
survey
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0
0.5
1
1.5
2
2.5
3
3.5
5 km 10 km 20km 31km 32km 40km
windows close
windows open
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0
0.5
1
1.5
2
2.5
3
3.5
5 km 10 km 20km 31km 32km 40km
windows close
windows open
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There are four experiments that have beendone and each experiment has been donerapidly for three times and takes the
average. The first graph is a survey from a blog and
the actual test that has been done.
Second and the third graph it show airconditioning on or air condition off have noeffect to the fuel consumption but with thewindows open it will affect the fuelconsumption.
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Traffics
Drain nut fuel tank leak
Hard to maintain 60km/h when uphill
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Traffics To solve this problem, change the time form the
afternoon to early morning
Drain bolt fuel tank leak
This is cause by over tighten the nut, to solve thisproblem by using a white tape to wrap the bolt.
Hard to maintain 60km/h when uphill Change route
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Air conditioning on or off it does notaffect the fuel consumption
windows is open and driving it will causesdrag. Drag is the resistance that cars,and all moving objects, encounter whenmoving through the air at any speed.
Most modern cars are designed to berelatively aerodynamic, which allowsthem to pass through the air with minimalresistance.
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windows down, air passes into the car where it wasformerly allowed to flow over it, causing resistancethat didn't exist when the windows were up.
Example a parachute. When a skydiver opens up the
parachute, it cups the air and causes a massiveamount of drag, enough to slow the speed of theskydiver and allow him or her to the land safely onthe ground.
Unlike the parachute, we definitely don't want a lot
of drag on your car because it makes your enginework harder to get your vehicle up to the samespeed and it will causes fuel consumption increase.
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This project had shown the fuel efficacyof the vehicle between air condition
on/off and windows close/open. It bestto use air condition on and windowsclose compare to air condition off andwindows open.
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THE END