mahoney table (yatharth thakkar)

BHAGWAN MAHAVIR COLLEGE OF ARCHITECTURE

Subject : Environmental Science

Topic : Mahoney Table for LOS ANGELES CITY

Faculty :- Ar. Dhruvita Mahida Ar.Nirav khandwala

Prepared By :- Yatharth Thakkar (82)

Months Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Monthly mean max. 20.1 20.3 21.2 22.6 23.6 25.6 28.4 29.1 28.4 25.8 22.7 19.8

Monthly mean min. 8.8 9.6 10.6 11.9 13.6 15.7 17.8 17.3 17.3 14.8 11.1 8.6

Monthly mean range 14.4 14.9 15.9 17.2 18.6 20.6 23 23.4 22.8 20.3 16.9 14.2

HumidityGroup

AverageRH

1 BELOW 30%

2 30 – 50%

3 50 – 70%

4 ABOVE 70%

HIGH AMT

29.1 23.9

8.6 13.1

LOW AMR

Months Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Monthly mean max. 20.1 20.3 21.2 22.6 23.6 25.6 28.4 29.1 28.4 25.8 22.7 19.8

Monthly mean min. 8.8 9.6 10.6 11.9 13.6 15.7 17.8 17.3 17.3 14.8 11.1 8.6

Monthly mean range 14.4 14.9 15.9 17.2 18.6 20.6 23 23.4 22.8 20.3 16.9 14.2

Air Temperature : ° C

Relative Humidity: (%)

COMFERT LIMIT FOR DIFFERENT HUMIDITY GROUPS

MonthsAMT OVER 20°C AMT 15 - 20°C AMT BELOW 15°C

DAY NIGHT DAY NIGHT DAY NIGHT

1 26 - 34 17 -25 23 - 32 14 - 23 21 – 30 12 - 21

2 25 - 31 17 - 24 22 - 30 14 - 22 20 - 27 12 - 20

3 23 - 29 17 - 23 21 - 28 14 - 21 19 - 26 12 - 19

4 22 - 27 17 - 21 20 - 25 14 - 20 18 - 24 12 - 18

Months Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL

Rainfall (mm) 79.2 96.5 61.7 23.1 2.3 0.3 1 6.1 16.8 26.4 35.7 59.2 379.2

AVERAGE MONTHLY TEMPERATURE IS 26.95° C AS PER ABOVE SLIDE

DAY COMFERT (UPPER) = 27 ° CDAY COMFERT (LOWER) = 22° C

NIGHT COMFERT (UPPER) = 21 ° CNIGHT COMFERT (LOWER) = 17° C

Diagnosis: ° CMonths Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Monthly mean max. 20.1 20.3 21.2 22.6 23.6 25.6 28.4 29.1 28.4 25.8 22.7 19.8

Day comfort upper 29 29 29 27 27 27 27 27 27 29 29 29

Lower 23 23 23 22 22 22 22 22 22 23 23 23

Monthly mean min. 8.8 9.6 10.6 11.9 13.6 15.7 17.8 17.3 17.3 14.8 11.1 8.6

Night comfort Upper 23 23 23 21 21 21 21 21 21 23 23 23

Lower 17 17 17 17 17 17 17 17 17 17 17 17

Thermal stress day C C C O O O H H H O O C

Night C C C C C C O O O C C C

DATA TAKEN FROM FIRST TABLEO = COMFERTABLE CLIMATE= MONTHY MAX. & MIN. ARE BETWEEN UPPER & LOWER LIMITC = COLD CLIMATE= MONTHY MAX. & MIN. ARE BELOW LOWER LIMITH = HOT CLIMATE= MONTHY MAX. & MIN. ARE ABOVE UPPER LIMIT

INDICATORS

THERMAL STRESS

RAINFALL HUMIDITY GROUP

MONTHLY MEAN RANGE

DAY NIGHT

H1H 4H 2,3 LESS THAN 10

H2 O

H3 OVER 200 mm

A1 1,2,3 MORE THAN 10

A2 H 1,2

H O 1,2

A3 C

Months Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL

Humid H1 √ √ √ 3

H2 √ √ √ √ √ 5

H3

Arid A1 √ √ √ √ √ √ 6

A2 √ √ √ 03

A3 √ √ √ √ √ √ √ √ √ 9

Table For Selecting Indicators

Indicators

H1 H2 H3 A1 A2 A3 DESIGN CRITERIAS

0-10√ 1 Orientation north & south

(long axis east-west)

11,125-12

0-4 2 Compact courtyard planning


11,12 √ 3 Open spacing for breeze penetration

2-10 4 As 3, but protection from hot & cold wind

0,1 5 Compact layout of estates

Layout:

Spacing:

Indicator totals H1 H2 H3 A1 A2 A33 5 4 6 3 9

H1 H2 H3 A1 A2 A3 DESIGN CRITERIAS0-2 12 Light walls, short time-lag

3-12 13 Heavy external & internal walls

H1 H2 H3 A1 A2 A3 DESIGN CRITERIAS0-5 14 Light, insulated roofs

6-12 15 Heavy roofs, over 8 hr. time-lag

H1 H2 H3 A1 A2 A3 DESIGN CRITERIAS2-12 16 Space for out-door sleeping required

H1 H2 H3 A1 A2 A3 DESIGN CRITERIAS3-12 √ 17 Protection from heavy rain necessary

Walls:

Roofs:

Out Door Sleeping:

Rain protection:




0,10 1 Large : 40-80%

1-122 Medium: 25-40%

2-5

6-10 3 Small: 15-25%

11,120-3 4 Very small: 10-20%

4-12 5 Medium: 25-40%


3-12

√ 6 In north & south walls at body height on wind ward side

1-20-5

6-127 As above, openings also in internal

walls0 2-12

Size of opening:

Position of opening:


H1 H2 H3 A1 A2 A3 DESIGN CRITERIAS0-2 8 Exclude direct sunlight

2-12 √ 9 Provide protection from rain

H1 H2 H3 A1 A2 A3 DESIGN CRITERIAS0-2 10 Low thermal capacity

3-12 11 Heavy, over 8 hr. time-lag

H1 H2 H3 A1 A2 A3 DESIGN CRITERIAS10-12 0-2 √ 12 Light, reflective surface, cavity

3-1213 Light, well insulated

0-9 0-5

6-12 14 `

Protection of openings:

Walls & Floors:

Roofs:



1-12 15 Space for out-door sleeping

1-12 √ 16 Adequate rain water drainage

External features:

mahoney table (yatharth thakkar)

Design