This document analyzes the climatic comfort of a proposed two-story residential building in Khulna, Bangladesh. It includes analysis of sun path and solar heat gain, natural light, wind flow and ventilation, precipitation, and compares the project to Mahoney's climate design guidelines. The analysis found the north-facing orientation and lack of protection from rain reduce comfort levels. While some spaces like the veranda are tolerable, overall the project does not satisfactorily meet human comfort requirements for the local climate.

1. GROUP
0505
13
Project Name: Residence of
Kazi Wahiduzzaman
Address: ROAD 19, HOUSE
125/,NIRALA R/A, KHULNA
Submitted by:
130121-NUSRAT JAHAN BARSHA
130136-TAHIA TASNIA
KHULNA UNIVERSITY, KHULNA,
BANGLADESH.
ARCHITECTURE
2ND YEAR 2ND TERM

2. STUDY ON CLIMATIC COMFORT IN BUILT ENVIRONMENTS
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Index
Serial No Topic Page
01 Project information 1
02 Project Location 2
03 Site 3
03 Functional Layout 4-5
02 vegetation 6
05 Special feature 7
06 Sun Path (with shade shadow) 8-9
07 Solar heat gain 10-17
08 Sky condition & Natural light 18-27
09 Wind flow and ventilation 28-32
10 Precipitation and Driving rain 33-36
11 Comparison with Mahoney table 37
12 Summary of analysis 38
13 Conclusion 39
14 References 40

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PAGE: 01
Project Information
•OWNER: KAZI WAHIDUZZAMAN
•ADDRESS: ROAD 19, HOUSE 125/,NIRALA R/A, KHULNA
•TYPE: RESIDENTIAL
•SITE AREA: 3581SQFT
•BUILDING AREA: 1061SQFT
•DESCRIPTION: 2 STORY HIGH
•ROAD ON FRONT(NORTH)SIDE ONLY
(2 BED ROOMS 2 TOILETS 1 VARANDA,
KITCHEN, DINING, FOYER)

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PAGE: 02
Project Location
• Longitude: 22~47’59.2”N
• Latitude: 89~33’04.7”E
• Climate narrative:
1. situated in composite or
monsoon climatic zone.
2. three seasons occur normally: Hot Dry,
Warm-Humid, Cool-Dry.
3. Temperature remains between 10’- 43’ Call
around the year.
4. average monthly rainfall 140mm and
humidity up to 70%.
Ref:google map view

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PAGE: 03
Site Plan
Site

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PAGE: 04
Functional layout and orientation
THIS BUILDING IS NORTH-
SOUTH ORIENTED
NORTH
SOUTH
DINING
TOILET
TOILET
KITCHEN

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PAGE: 05
Functional Layout Zoning
BEDROOMBEDROOM
DINING
VARENDA
SERVE AREA
CIRCULATION AREA
SERVICE AREA
TOILET
TOILET
KITCHEN

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PAGE: 06
Vegetation
• Big amount of
vegetation in south and
east side of the building

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PAGE: 07
Special Feature
THERE IS A DRAIN BESIDE THE
BUILDING. IT EFFECTS THE
FRESH AIR.
THERE IS A ROAD IN NORTH AND
WEST SIDE. IT HAMPERS PRIVACY.

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PAGE: 08
Sun Path(With Shade Shadow)
9:00 am 3:00 PM12:00 pm
June
December
Ref: Autodesk Revit Site Plan

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PAGE: 09
Sun Path(With Shade Shadow)
9:00 am 3:00 PM12:00 pm
June
December
Ref: Sun calc

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PAGE: 10
Sun Path(With Annual Shade Shadow)
Annual shadow range(9am -3pm)
Ref: Eco Tech

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PAGE: 11
Sun Path(With Shade Shadow)
Ref: Eco Tech

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PAGE: 12
Solar Radiation
Ref: Eco Tech

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PAGE: 13
Solar Heat Gain
Solar Heat Gain Yearly Chart

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PAGE: 14
Solar Heat Gain
uncomfortable
More tolerable
Tolerable
Less tolerable
Comfortable
In Summer In Winter
User Response
BEDROOMBEDROOM
DINING
VARENDA
TOILET
TOILET
KITCHEN
BEDROOMBEDROOM
DINING
VARENDA
TOILET
TOILET
KITCHEN

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PAGE: 15
Solar Heat Gain
uncomfortable
More tolerable
Tolerable
Less tolerable
ComfortableAnnual Analysis
BEDROOMBEDROOM
DINING
VARENDA
TOILET
TOILET
KITCHEN

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PAGE: 16
Summary of Analysis(Solar Heat Gain)
We use ECOTECT for measuring SOLAR RADIATION.
Beside ECOTECT gives us a unit of W/m2. So every m2 we gate different value of
SOLAR RADIATION.
 But here we consider a single room as a single value of radiation by user response,
analysis and Mahoney table
 From analysis we come to that bed room 2 is more comfortable than bed room 1`
Veranda is always tolerable
Toilet 1 is more tolerable then toilet 2.

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Solar Heat Gain(Comparison with Mahoney Table)
Functions Most
Desirable
Desirable Less
Desirable
Worst In our
Project
Remark
Bedroom1 S &S-E N-E S-W NW/W N-W WORST
Bedroom 2 S &S-E N-E S-W NW/W N-E DESIRABLE
Dining S &S-E S-W&N-E N-W W W WORST
Kitchen N&W N-W&E S-W&N-E S&S-E N-E LESS
DESIRABLE
Toilet 1 N&W N-E S-E N-W&W N-W WORST
Toilet 2 N&W N-E S-E N-W&W N-E DESIRABLE

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PAGE: 18
Sky Condition and Natural Light(Bed room-1,9:00am)
June
December
False colorISO
Ref: Velux Daylight Visualizer
September

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PAGE: 19
Sky Condition and Natural Light(Bed room-1, 12:00pm)
December
June
False colorISO
Ref: Velux Daylight Visualizer
September

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PAGE: 20
Sky Condition and Natural Light(Bed room-1,3:00pm)
June
December
False colorISO
Ref: Velux Daylight Visualizer
September

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PAGE: 21
Sky Condition and Natural Light(Bed room-2, 9:00am)
June
December
False colorISO
Ref: Velux Daylight Visualizer
September

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PAGE: 22
Sky Condition and Natural Light(Bed room-2, 12:00pm)
June
December
False colorISO
Ref: Velux Daylight Visualizer
September

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PAGE: 23
Sky Condition and Natural Light(Bed room-2, 3:00pm)
False colorISO
June
December
Ref: Velux Daylight Visualizer
September

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PAGE: 24
Sky Condition and Natural Light(At plan level):
False colorISO
9:00am, June
3:00pm, June
12:00pm, June
Ref: Velux Daylight Visualizer

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Sky Condition and Natural Light
False colorISO
9:00am,December
3:00pm,December
12:00pm, December
Ref: Velux Daylight Visualizer

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PAGE: 26
Sky Condition and Natural Light(Bed room-1)
```
DAYLIGHT 3:00 PMDAYLIGHT 9:00 AM DAYLIGHT 12:00PM
ENLIGHTED
MORE MODERATE
MODERATE
LESS MODERATE
DARKER
User Response

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PAGE: 27
Summary of Analysis(Sky Condition and Natural Light)
We use VELUX day light visualize for measuring day light.
Here VELUX doesn’t consider side surrounding buildings.
Beside VELUX gives us a unit of Cd/m2. So every m2 we gate
different value of light. But here we consider a single room as
a single value of light.
 From analysis we come to that bed room 1 is more lighter
than bed room 2
Veranda is always enlighten.
Toilet 1 is moderate then toilet 2.
For comparison we convert value of VELUX as same colour
code as user.

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PAGE: 28
Wind Flow and Ventilation
MONTHLY WIND FLOW AND VENTILATION:
Ref: Autodesk Flow Design
WIND SPEED:
ANNUAL WIND FLOW AND VENTILATION:

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PAGE: 29
Wind Flow and Ventilation
G
R
O
U
P-
02
G
R
O
U
P-
02
SIMULATED INFORMATION for bedroom 1:
Q= K x A x V
Q= Rate of ventilation air flow
For wind impending at a 45° angle of incidence roughly K= 0.4
A=(2.13 x 1.2)=2.55
V =3km/h= 0.73 m/s
Defining the Q= Rate of ventilation air flow
Data for bedroom 1:
Q = 2.55×.4×.73=.714m3/sec
SIMULATED INFORMATION for bedroom 2:
Q= K x A x V
Q= Rate of ventilation air flow
For wind impending at a 45° angle of incidence roughly K= 0.4
A=(2 X1)=2
V =6km/h= 0.73 m/s
Data for bedroom 2:
Q = 2×.4×.73=.584m3/sec

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Wind Flow and Ventilation
In Summer In Winter
Direct wind
Reflected wind

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Wind Flow and Ventilation(Annual):
From this annual report we come to
know that –
1. Maximum wind flow from western
side. 1-32 knots per hour.
2. Medium wind flow from north-west
3. Minimum wind flow from south-
east.

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Summary of Analysis(Wind Flow and Ventilation)
We use FLOW DESIGN for measuring wind flow.
Beside FLOW DESIGN gives us a unit of m/s2. So every m2 we
gate different value of wind flow .
 From analysis we come to that wind flows better in bed room 1
than bed room 2
Veranda is always well ventilated.
 wind flows indirectly from kitchen in winter.
The service zone is not well ventilated
Toilets are well ventilated
We know in summer wind comes from south. But our building
are north-faced. But the south wind from west zone and
reflected with tall buildings and come from north.

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PAGE: 33
Precipitation and Driving Rain
DRIVING RAIN
WATERED AREA
PRICIPITATION AND DRIVING RAIN AT PLAN LEVEL
User Response

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Precipitation and Driving Rain
NORTH-WEST VARENDA
2’
User Response

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PAGE: 35
Precipitation and Driving Rain
1’
BEDROOM -1
User Response

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PAGE: 36
Precipitation and Driving Rain
6”
BEDROOM-2
User Response

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PAGE: 37
Comparative Analysis with Mahoney Table
Functions Most
Desirable
Desirable Less
Desirable
Worst In our
Project
Remark
Bedroom1 S &S-E N-E S-W NW/W N-W WORST
Bedroom 2 S &S-E N-E S-W NW/W N-E DESIRABLE
Dining S &S-E S-W&N-E N-W W W WORST
Kitchen N&W N-W&E S-W&N-E S&S-E N-E LESS
DESIRABLE
Toilet 1 N&W N-E S-E N-W&W N-W WORST
Toilet 2 N&W N-E S-E N-W&W N-E DESIRABLE

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Summary of Analysis:
conditions Existing in the project
North-south orientation Orientation north-south
Open spacing for breeze penetration Open spacing in one side, on the south.
Large openings 40-80% Medium openings 30%-35%
Light walls short time lags Walls are light, internal walls are 5’’
Protection for heavy rain No Protection from rain
Light ,insulated roof Light, insulated roof available
Open spacing and protection from hot and cold Minimum Protection from hot and cold

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PAGE: 39
Conclusion
 THE BUILDING IS NORTH FACED.
 THERE IS ROAD BESIDE THE BULDING. WHICH IS NOT COMFORTABLE FOR PRIVACY.
 THERE IS DRAIN BESIDE THE BULDING, WHICH HAMPERS THE ENVIROMENT
BEYOND THE BUILDING THERE IS MANY VEGETATION.
AFTER THE ANALYSIS OF THE ASPECTS OF CLIMATIC FACTORS , THE PROJECT WE HAVE
ANALYSIED IS NOT SATISFCATORY. DO NOT SATISFY THE REQUIREMENETS OF COMFORT LEVEL
OF HUMAN BEING.

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PAGE: 40
References
http://suncalc.net/#/22.802,89.5425,16/2015.12.21/16:58
http://www.sunearthtools.com/dp/tools/pos_sun.php
http://www.weatheronline.co.uk/Bangladesh/Khulna.htm
http://www.weatheronline.co.uk/weather/maps/current?LANG=en&CONT=ukuk
http://sustainabilityworkshop.autodesk.com/sites/default/files/styles/large/public/core-
page-inserted-images/climate_windrose-underlay_vasari.jpg
http://sustainabilityworkshop.autodesk.com/buildings/ecotect-vasari-climate-analysis
http://www.autodesk.com/education/home
https://www2.buildinggreen.com/climate-analysis-webcast
https://www.ntnu.no/documents/10310/32999357/AAR4832-
4532+course+presentation.pdf/bf653cf1-5a7d-434e-ac7a-e8f43d295053
http://www.slideshare.net/search/slideshow?searchfrom=header&q=climatic+analysis+of+
a+building&ud=any&ft=all&lang=en&sort
Wikipedia
Manual of tropical housing and building – koenigsberg, Ingersoll, mayhew, szokolay
Climate and build form- NTNU master of science programme.