fuel eficiency

7/30/2019 fuel eficiency

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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

Documents

fuel eficiency