PPT TALENTA CEST_DICKY tentang prosiding internasional

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1. The Impact of Orientation on Energy Use in Affordable Housing in Humid Tropical Climate Area Dicky Andrea Sembiring

2. Introduction Buildings are one of the largest energy-consuming sectors in the world. Based on a report by the United Nations Environment Program (UNEP), the leading global authority on the environment formed by the United Nations, in 2022, buildings are responsible for 34% of global energy use. Housing is the largest contributor to energy use in the building sector, namely 21%, followed by non-residential buildings at 9% and the building construction industry at 4%

3. Introduction But on the other hand, the need for housing will continue to increase. According to data from BPS-Statistics Indonesia, in the economic social national survey in 2020, around 12.75 million housing units are still needed to meet housing needs in Indonesia With a very large shortage of housing, this means that there will still be a significant increase in energy use in the housing sector in Indonesia. To be able to reduce the increase in energy as optimally as possible, there needs to be efficiency at every stage. Cheaper options can be implemented through an efficient planning process. The application of passive design in planning can reduce energy use without incurring large costs.

4. Introduction There are several passive design parameters that have a big impact on the energy efficiency of buildings which can be regulated at the planning stage: Building form factor, transparency ratio, insulation thickness, and orientation. This research will answer the relationship between orientation and energy use in healthy affordable housing in Indonesia. It can provide input for the Indonesian government to create regulations regarding building orientation for healthy affordable housing.

5. Method Simulation Parameter Unit Quantity Description Floor Area m2 36   Room Height m 2,4   Envelope       Façade Glazing (U-Value) W/m2.K 3.1 Single glazing glass Façade Glazing (SHGC)   0,5 Observed Wall (U-Value) W/m2.K 3,1 Brick plastered Floor (U-Value) W/m2.K 1,7 Ceramic tile Infiltration m3/m2.h 1,5 Operable window Roof (U-Value) W/m2.K 3,18 Corrugated zinc roof, wood frame, gypsum ceiling Shading     Analyse Shading Drawn in 3D Model Space Use       Occupant Density m2/person 9 Ministry of Public Works and Housing Equipment Power Density W/m2 2 Observed Lighting Power Density W/m2 1 Observed Setpoint Temperatures °C 20-29 Observed Setback Temperatures °C 20-33 Observed Operating hours   6 PM – 6 AM Observed Outside air rate/person L/s person 12.5 Based on the Indonesia National Standard (SNI) [19] Air conditioning schedule   6 pm - 6 am Observed HVAC Type     Air Conditioning Split Type + Natural Ventilation

6. Method The healthy affordable housing type used has a building area of 36 m2 and a land area of 90 m2. The residence consists of 2 bedrooms, 1 living room, a dining room, a kitchen, and a bathroom. The room is occupied by 4 people; 2 adults and 2 small children

7. Method Simulation of energy use in buildings will be carried out based on an angle difference of 22.5 degrees for each simulation, so that 16 building variations will be produced. The first simulation will be made with the building facing East. In Figure 2 below, the orientation matrix of the azimuth angles that will be simulated is displayed.

8. Result   H C F L E P Total EAST 470 287,0 97 194 119 1167 ENE 467 286 97 194 119 1163 NE 450 285 97 194 118 1144 NNE 437 283 97 194 116 1127 NORTH 430 282 97 194 114 1117 NNW 427 283 97 194 105 1106 NW 455 285 97 194 115 1146 WNW 468 287 97 194 120 1166 WEST 474 288 97 194 123 1176 WSW 473 288 97 194 123 1175 SW 458 286 97 194 123 1158 SSW 438 283 97 194 120 1132 SOUTH 430 282 97 194 118 1121 SSE 425 283 97 194 108 1107 SE 450 284 97 194 114 1139 ESE 464 286 97 194 117 1158

9. Discussion

10. Discussion The highest energy use in buildings occurs when the building orientation faces West, namely 1,176 kWh per year. The highest energy use in buildings occurs when the building orientation faces North North West, namely 1,106 kWh. Segment NNW kWh per Year WEST kWh per Year Difference kWh per Year Heating - -   Cooling 427 474 47 Fans 283 288 5 Lighting 97 97 - Equipment 194 194 - Pump 105 123 18 Total 1.106 1.176 70

11. Discussion The biggest difference lies in the energy used for the cooling system, which is 47 kWh per year. Choosing the right building orientation can reduce around 6% of total annual energy use or around 70 kWh. The need for healthy affordable housing in Indonesia is still very large. Indonesia still needs 12.7 million more healthy affordable housing to meet the needs of the Indonesian people. If the rules regarding building orientation can be implemented in the construction of healthy affordable housing in the future, 889 GWh will be saved per year

12. Conclusion Based on the research results, it is known that the most optimal orientation is the building orientation facing NNW with the worst orientation facing WEST with a difference in energy use of around 6% or 70 kWh per year. Using this orientation in the planning process for a simple residence can have a big impact on reducing energy use. Assuming that Indonesia still needs 12.7 million simple homes, energy use can be reduced by 889 Gwh per year by implementing this optimal orientation. By implementing a passive design that is energy responsive we will not require large additional costs but can reduce energy use significantly. By implementing the use of good orientation for designing simple houses in Indonesia, we will be able to make quite large energy savings.

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