OTTV (SNI 03-6389-2011) and ETTV (BCA 2008) Calculation for Various Building’s Shapes, Orientations, Envelope Building Materials: Comparison and Analysis

Sandra Loekita, Jimmy Priatman




Abstract


The Indonesian National Standard SNI 03-6389-2000 adapted the 1983 Singapore’s Handbook on Energy Conservation and limited the Overall Thermal Transfer Value (OTTV) of the building envelope to 45 Watt/m2. In 2008, the Singapore’s Building and Construction Authority (BCA) shifted to Envelope Thermal Transfer Value (ETTV) value of 50 Watt/m2, while SNI 03-6389-2011 continues to use OTTV. This paper reviewed the new SNI 03-6389-2011 and compared it with BCA by calculating OTTV and ETTV of prismatic buildings with eight different shapes and building orientations, 11 Window to Wall Ratio, and 27 building envelope materials. This study also tested those variables to find the best building shape and orientation for an energy saver building. The result shows that ETTV (BCA) is stricter than OTTV (SNI 03-6389-2011) except the OTTV with black building envelope, while parallelogram shape building with North-South orientation is the best combination of energy saver building.


Keywords


Building shape; building orientation; envelope building material; ETTV; OTTV.

References


  1. Koo, T.K., A Study on The Feasibility of Using The Overall Thermal Transfer Value (OTTV) on Assessing The Use of Building Energy in Hong¬kong, The Hong Kong Polytechnic University, 2001. http://www.worldenergy.org/wec-geis/wec_ congress/default.asp
  2. Standar Nasional Indonesia (SNI) 03-6389-2000, Konservasi Energi Selubung Bangunan pada Bangunan Gedung, Badan Standardisasi Nasional (BSN) Jakarta, Indonesia, 2000.
  3. Standar Nasional Indonesia (SNI) 03-6389-2011, Konservasi Energi Selubung Bangunan pada Bangunan Gedung, Badan Standardisasi Nasio¬nal (BSN) Jakarta, Indonesia, 2011.
  4. The Development & Building Control Division (PWD), Handbook on Energy Conservation in Building and Building Services, Singapore, 1983.
  5. Building and Construction Authority (BCA), Code on Envelope Thermal Performance for Buildings, Singapore, 2008.
  6. The Development & Building Control Division (PWD), Handbook on Energy Conservation in Building and Building Services, Singapore, 1975.
  7. Prayoga, M.H., Analisa Bentuk, Orientasi, Selubung, Material Bangunan Berdasarkan RSNI 03-6389-2011 dan ETTV BCA 2008, Studi Kasus: Lingkaran, Segi Delapan Sama Sisi, Segitiga Sama Sisi, dan Jajaran Genjang, Graduate Thesis, Petra Christian University, Surabaya, Indonesia, 2011 (in Indonesian).
  8. Gunawan, Y.P., Analisa Bentuk, Orientasi, Selubung, Material Bangunan Berdasarkan RSNI 03-6389-2011 dan ETTV BCA 2008, Studi Kasus: Bujur Sangkar, Persegi Panjang, Elips, dan Trapesium, Graduate Thesis, Petra Christian University, Surabaya, Indonesia, 2011 (in Indonesian).


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