ANALYSIS OF MENARA PJH (LOT 2C2), PUTRAJAYA.

Page 1

01

// East Facade of Menara PJH

MENARA PJH

The building's longest facade is facing East and West which contradicts to the basic building design principles. (MS 1525: 2014) This orientation results in higher building heat gain throughout the day. The building was built in this orientation maybe because of site boundary restrictions and they needed to maximize built-up area. Due to this orientation, East ad West facade need shading device.

03

TEMPERATURE & HUMIDITY

AVG INDOOR (OFFICE) Table A

AVG OUTDOOR Table B

N

02

SOLAR ANALYSIS Vertical fins

SUN CHART

SITE PLAN

//Red colour line is the boundary of Lot 2c2, which was purchased by Putrajaya Holdings. (Jafri Merican Architect, 2011)

Figure 1.2 N

//The building orientation also maximizes the view on the Putrajaya Bridge / Jambatan Seri Wawasan (A) and the Putra Mosque (B)

Data collected (Table A and B) is obtained during our site visit on 24th October 2017. The annual humidity in Putrajaya is averagely 80% and the maximum and minimum annual temperature of Putrajaya is 31.7 °C and 22.5 °C respectively. (World Weather and Climate Information, 2016) The outdoor temperature and humidity measured on site is similar to the annual average temperature and humidity of Putrajaya. The recommended indoor humidity is between 75% to 70%. (MS 1525: 2014) and the average indoor humidity is 71% (Table A). This shows why the windows of Menara PJH are mostly sealed according to observation on site to reach the humidity standard. With the presence of vertical fin, the temperature and humidity in the building interior is effectively decreased. (Refer to Figure 4.4)

Shadow

The building receives maximum sunlight on East & West facade. Therefore, vertical fins are installed at the East and West facade as sun shading device to increase natural ventilation and thermal comfort to reduce heat gain in the interiors without air conditioning as well as reducing the energy consumption in the area with airconditioning. Block B, C and D are shaded by Block A during noon and afternoon of the day. Therefore, no vertical fins are needed at these blocks.

Figure 1.1 N

PUTRAJAYA

GBI GOLD Location: Lot 2C2, Persiaran Barat, Presint 2, 62000 Putrajaya, Wilayah Persekutuan Putrajaya Latitude: 2.9299 °N Longitude: 101.6882 °E The construction of the office green building on Menara PJH (Lot 2C2), marks the first of its kind in the main commercial boulevard of Putrajaya and underscores the city’s status as a pioneer of green technology such as solar renewable energy, grey water recycling system. shading device, rain water harvesting and site layout to reduce vehicles carbon emissions.

ORIENTATION

Figure 2.1 // Annual sun path in 2016 at 4pm on 21 Mar, 21 Jun and 21 Dec at Menara PJH simulated with http:// sunearthtools.com/

Figure 2.2 // Interior of Menara PJH's West facade at 4pm shaded by the vertical fins.

EAST FAÇADE receives highest exposure to sunlight in the morning. (Refer to 4.1 ) WEST FAÇADE receives highest exposure to sunlight in the afternoon. ( Refer to 4.3 )

04

HEAT GAIN ANALYSIS N

kWH/m2 50 40 30

10 AM

1 PM

4 PM

Figure 4.1

Figure 4.2

Figure 4.3

20 10 0

East facade receives maximum heat gain in the morning.(Figure 4.1). West facade starts to gain heat at noon. (Figure 4.2). West facade receives maximum heat gain in the afternoon.(Figure 4.3). Thus, shading devices are needed to shade the East and West facade. However, wind velocity (Figure 6.2 & 6.3) helps to carry away the heated air (Figure 5.4). Therefore, there's sufficient air flow in the building despite being exposed to sunlight in the afternoon. (Refer to Figure 6.1) Figure 4.1, 4.2 & 4.3 show the heat gain analysis throughout the day. Figures generated by software Insight Revit 2016

// MEMBER: TAN WEI SEN 0324564 | TAN CHIN WERNG 0324408 | POH JIA JOU 0327192 | WONG LOK XUAN 0325529 | WONG LIENG KAM 0323566 | CHEW RUI BO 0322334 | LIM MEN HORNG 0324530 // TUTOR: DR.SUJATAVANI // BUILDING SCIENCE 01 // CASE STUDY: ANALYZING PASSIVE DESIGNS //


Turn static files into dynamic content formats.

Create a flipbook
Issuu converts static files into: digital portfolios, online yearbooks, online catalogs, digital photo albums and more. Sign up and create your flipbook.
ANALYSIS OF MENARA PJH (LOT 2C2), PUTRAJAYA. by ChinWerng Tan - Issuu