No abstract

Buildings consume high energy and cause an increase in CO2 gas emissions to the environment. This energy consumption is known as embodied energy where energy is used in the production and maintenance processes of buildings. In buildings, the largest consumption of embodied energy is contained in the walls. Among the various materials and construction of building walls, the trend of the plaster bamboo wall has been significantly increased because it has several advantages for the environment. This research was conducted to measure the embodied energy contained in bamboo wall construction located in Kampung Buyut Cipageran, Cimahi City. This research method uses Inventory Carbon and Energy (ICE) data from the University of Bath and Indonesian National Standard as the basics data for the calculation. The analysis has been conducted by calculating the basics data and the design drawings. The result showed that the embodied energy in the bamboo walls had a value of 230.61 MJ/m2. This result is lower than the known standard for brick wall with 440 MJ/m2. The bamboo wall is proved to be more efficient in energy use than conventional wall with brick as the main construction.Keywords: bamboo wall; embodied energy; Abstrak: Bangunan mengkonsumsi energi yang cukup tinggi dan mengakibatkan peningkatan emisi gas CO2 ke lingkungan. Penggunaan energi ini diketahui sebagai embodied energy dimana energi digunakan dalam proses produksi dan perawatan bangunan. Dalam suatu bangunan, penggunaan embodied energy terbesar terletak pada dinding. Dari berbagai material dan konstruksi pembentuk dinding bangunan, dinding bambu plester menjadi tren terbaru karena memiliki beberapa keunggulan dalam keramahan terhadap lingkungan. Penelitian ini dilakukan untuk mengukur embodied energy yang terdapat pada komponen dinding bambu di salah satu bangunan Kampung Buyut Cipageran, Kota Cimahi. Metode pengukuran menggunakan data Inventory Carbon and Energy (ICE) dari University of Bath dan petunjuk analisis pekerjaan konstruksi dari SNI. Hasil analisis menunjukkan bahwa embodied energy pada dinding bambu plester memiliki nilai 230,61 MJ/m2. Jika dibandingkan dengan dinding bata plester konvensional yang memiliki standar 440 MJ/m2, dinding bambu plester lebih efisien dalam penggunaan energi dalam siklus hidupnya.Kata Kunci: dinding bambu; embodied energy;.

Mosque buildings in Indonesia show the influence of architectural styles from the Middle East and other parts of the world. Today, information technology and the development of architectural schools play important roles in mosque styles in Indonesia. This study compared two Indonesian mosques (the Cabean and Eco Pesantren mosques in Central and West Java, respectively) in different architectural styles and considered construction processes, development actions and environmental conditions (highlands and lowlands close to the coast). Architectural quality was measured in terms of thermal comfort in the mosques. Field surveys and environmental quality measurements were undertaken at both mosques, consisting of T DB°C , T WB°C , T BG°C and v m/s. The results showed differences in mosque quality in the following aspects affecting thermal comfort: (1) the size and location of ventilation openings, (2) building aspect ratio and distance to other buildings, (3) thermal mass and (4) outdoor design quality. Horizontal and vertical openings play a significant role in thermal comfort in terms of airflow, which is affected by the distance between buildings. Building materials also play an important role in thermal comfort with regard to the penetration of direct solar radiation through the roof.

Controlling the thermal behaviour of buildings is very important because it affects the energy use in the buildings and impacts the thermal environment of the area. Thermal behaviour of the building is determined by the type and composition of the building material. This paper shows the thermal behaviour of several types and composition of commonly used building wall materials, i.e. brick, aerated concrete, laminated wood with glass wool insulation, and gypsum with glass wool insulation. For the thermal behaviour measurements, we used wall models exposed to halogen lamps of 2000 watts for 4 hours heating and 4 hours for cooling with a measurement interval of 5-15 minutes. Data retrieval using 8 thermocouples mounted on the surface and inserted inside the wall. The observed thermal behaviour phenomena are the heat flow on the walls, the time delay, and the heat capacity. The results show different maps of the thermal behaviour on the walls and indicating the need for additional thermal insulation material to control the heat release to the outside and inside of the building.

Operational energy contributes significantly to the most energy consumption of a building’s life cycle. Analysis of operational energy is usually conducted when a building is being operated. However, we can compare and predict the operational energy of a building’s designs to obtain the best design alternative low energy building. The objective of this study is to simulate the operational energy of the design of the Centre of Excellent (CoE) building at Universitas Pendidikan Indonesia (UPI). Rhinoceros and Grasshopper with Ladybug and Honeybee are selected as the software simulation due to the comprehensive features of energy simulation. This modern building will be constructed for five floors with an area of about 5000 m2 per level facing south and north sides. Analysis of operational energy calculated three main factors of cooling, lighting, and other equipment. The result shows that the annual operational energy contributes to about 586 kWh/m2 per year. This value is far from the basic standard for educational building, with about 240 kWh/m2 per year from ASEAN. The cooling system of the building is recorded as the highest amount of energy use. Further, evaluating the building’s operational devices and the strategy to reduce the energy loads will be proposed to accommodate a modern school building’s main issue that harms operating energy.