ByRudraprasad Bhattacharyya

&

Sandhyatara Saha

Thermal Comfort inside Residential Building with Varying

Window Locations and Size

PROBLEM

The optimal internal sunlight penetration through windows for different locations and orientation of residential building during the overheating and high humid periods.

The effect of various locations of windows to reduce the required cooling loads and thermal performance considering the use of best shading devices is presented through simulation.

Compares of simulation data for the proposed building height to the height recommended by National Building Code of India.

THE CLIMATE OF KOLKATA AND ALIKE REGIONS

•Mainly hot and humid climateAs per Data available at Netaji Subhash Chandra Bose International Airport (Kolkata (Calcutta), India) weather station from 1996 to 2012, Kolkata (Calcutta) having tropical savanna climate with dry winters.

EXPERIMENT- PRE CONDITION

Autodesk Ecotect Analysis, (2011 version) software for simulation

2 types of Room with provision of cross ventilation

3.0 M Room Height4.0 M Room Height

Room Criteria:•Bed room/sitting room•Occupancy of 3 to 4 number of persons•Interior lighting level 300 lux to 350 lux.

Room Criteria:•Bed room/sitting room•Occupancy of 3 to 4 number of persons•Interior lighting level 300 lux to 350 lux.

EXPERIMENT 1 & 23.0 M height Room with Single row of window with window height 1.3 m and width 1.0 m

3.0 M height Room with 2 row of window with window height 600 mm and width 1.0 m

EXPERIMENT 3 & 44.0 M height Room with 2 row of windows with different window size, Big window of having height 1.3 m and width 1.0 m and Small window of having height 600 mm and width 1.0 m 4.0 M height Room with 3 row of windows with uniform window sizes having height 600 mm and width 1.0 m

EXPERIMENT 1HOUR(C)

INSIDE (C)

OUTSIDE (C)

TEMP.DIF (C)

00 32.9 29.0

3.9

01 32.8 28.8

4.0

02 32.5 28.0 4.5

03 32.4 28.2

4.2

04 32.1 29.2

2.9

05 32.1 30.6 1.5

06 32.8 31.6

1.2

07 34.0 33.5

0.5

08 34.9 34.5

0.4

09 36.9 36.4

0.5

10 38.3 37.8 0.5

11 39.9 40.0

-0.1

12 38.2 40.9

-2.7

13 38.4 41.2

-2.8

14 40.7 39.3

1.4

15 38.5 37.3

1.2

16 36.7 34.6 2.1

17 36.3 33.5

2.8

18 36.0 32.4

3.6

19 34.5 32.5

2.0

20 33.7 31.7

2.0

21 33.4 31.5

1.9

22 33.1 30.4

2.7

23 33.1 30.3

2.8

EXPERIMENT 2

Hour Inside temp (°C)

Outside temp (°C)

Temp Diff(°C)

0 34.1 29 5.11 34 28.8 5.22 33.7 28 5.73 33.6 28.2 5.44 33.4 29.2 4.25 33.5 30.6 2.96 33.4 31.6 1.87 33.7 33.5 0.28 34.1 34.5 -0.49 34.7 36.4 -1.710 35.2 37.8 -2.611 36.3 40 -3.712 36.9 40.9 -413 37.3 41.2 -3.914 38 39.3 -1.315 38.1 37.3 0.816 37.1 34.6 2.517 37.2 33.5 3.718 37.1 32.4 4.719 35.7 32.5 3.220 35 31.7 3.321 34.7 31.5 3.222 34.3 30.4 3.923 34.4 30.3 4.1

EXPERIMENT 3

Hour Inside temp (°C)

Outside temp (°C)

Temp Diff(°C)

0 32.7 29 3.71 32.5 28.8 3.72 32.4 28 4.43 32.3 28.2 4.14 32.2 29.2 35 32.1 30.6 1.56 32.2 31.6 0.67 32.5 33.5 -18 32.7 34.5 -1.89 33.2 36.4 -3.210 33.7 37.8 -4.111 34.3 40 -5.712 34.2 40.9 -6.713 34.8 41.2 -6.414 35.4 39.3 -3.915 35.1 37.3 -2.216 35 34.6 0.417 34.8 33.5 1.318 34 32.4 1.619 33.3 32.5 0.820 33 31.7 1.321 32.9 31.5 1.422 32.8 30.4 2.423 32.7 30.3 2.4

EXPERIMENT 4

Hour Inside temp (°C)

Outside temp (°C)

Temp Diff(°C)

0 32.3 29 3.31 32.3 28.8 3.52 32.1 28 4.13 32.1 28.2 3.94 32 29.2 2.85 32 30.6 1.46 32.2 31.6 0.67 32.7 33.5 -0.88 33.1 34.5 -1.49 33.9 36.4 -2.510 34.5 37.8 -3.311 35.1 40 -4.912 34.5 40.9 -6.413 34.6 41.2 -6.614 35.6 39.3 -3.715 34.7 37.3 -2.616 34.1 34.6 -0.517 34 33.5 0.518 33.8 32.4 1.419 33.1 32.5 0.620 32.7 31.7 121 32.6 31.5 1.122 32.4 30.4 223 32.4 30.3 2.1

CONCLUSIONS

REFERENCES[1] Wang Liping and Wong Nyuk Hien, Applying Natural Ventilation for

Thermal Comfort in Residential Buildings in Singapore, Architectural Science Review Volume, 50(3), pp 224-233.

[2] Grace Cristina Roel Gutierrez, Lucila Chebel L., An Experimental Study of Shading Devices: Orientation Typology and Material, Buildings X proceedings, ASHRAE, 2010.

[3] Saiful Hasan Tariq and Mahbuba Afroz Jinia, Effect of Fixed Horizontal Shading Devices in South Facing Residential Buildings, Proceedings of the Global Engineering, Science and Technology Conference at Dhaka, Bangladesh, 2012.

[4] Tobias Rosencrantz, Performance of Energy Efficient Windows and Solar Shading Devices, Evaluation through Measurements and Simulations, Licentiate Thesis, Lund University, 2005.

[5] Wardah Fatimah Mohammad Yusoffa, Elias Sallehb, Nor Mariah Adamc,Abdul Razak Sapiand, Zabidi Hamzaha, Investigation of Potential Solar Induced Ventilation Strategy in Hot and Humid Climate, Alam Cipta, vol. 5 (1), 43-54, 2012.

Contd.

REFERENCES[6] Energy Statistics 2013. a report by Central Statistics Office,

Ministry of Statistics and Programme Implementation, Govt. of India, New Delhi.

[7] ANSI/ASHRAE Standard 55-2001 [8] ANSI/ASHRAE Standard 55-2010, Thermal Environmental

Conditions for Human Occupancy. [9] http://weatherspark.com/averages/33920/Kolkata-Calcutta-West-

Bengal-India [10]Humphreys, M., Nicol, J., Understanding the Adaptive Approach

to Thermal Comfort, ASHRAE Trans., 1998. [11] Janmejoy Gupta, Dr Manjari Chakraborty, Simulation and On-

Site Measurement Methods To Study Thermal Performance Of Rural Mud Hut In Humid Sub-Tropical Climate: A Case-Study In Jharkhand, Int. J. Engineering Research and Technology, vol. 2 (6), 1243-1273, 2013.

[12]National Building Code of India 2005