Henry Feriadi
Alumni, Department of Building Science, National University of Singapore

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EVALUASI KINERJA SELUBUNG BANGUNAN GEDUNG AGAPE UNIVERSITAS KRISTEN DUTA WACANA YOGYAKARTA Octarino, Christian Nindyaputra; Feriadi, Henry
LANGKAU BETANG: JURNAL ARSITEKTUR Vol 8, No 2 (2021): October
Publisher : Department of Architecture, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/lantang.v8i2.45436

Abstract

Di tengah fenomena perubahan iklim dan pemanasan global, arsitektur sudah semestinya turut berperan dalam menjaga lingkungan dengan menghadirkan desain-desain bangunan yang memiliki performa tinggi, yang dapat memberikan kenyamanan optimal bagi penghuninya tanpa mengorbankan kualitas lingkungan di sekitarnya. Karakter iklim Indonesia yang merupakan iklim tropis menyebabkan tingginya temperatur lingkungan, sehingga berpotensi menimbulkan ketidaknyamanan bagi penghuni bangunan. Upaya dalam meningkatkan kenyamanan tentu akan membutuhkan konsumsi energi yang tinggi, sehingga perlu dipikirkan strategi konservasi energi agar bangunan tidak berdampak negatif terhadap lingkungan. Sebagai bagian dari kompleks Universitas Kristen Duta Wacana Yogyakarta, Gedung Agape adalah gedung dengan fungsi perkantoran yang menggunakan sistem pendingin udara. Setelah digunakan selama 12 tahun, Gedung ini memiliki evaluasi kenyamanan termal yang cukup baik oleh para penghuninya. Namun demikian, diyakini Gedung Agape masih memiliki potensi penghematan energi yang cukup besar melalui kinerja selubung bangunannya. Studi ini bertujuan untuk mengevaluasi bagaimana kinerja selubung bangunan Gedung Agape UKDW dalam fungsinya mereduksi panas dari lingkungan serta menentukan strategi apa saja yang dapat diterapkan untuk menekan nilai Overall Thermal Transfer Value (OTTV) dalam upaya mendukung konservasi energi pada bangunan. Standar Nasional Indonesia tentang konservasi energi Gedung menetapkan nilai OTTV maksimal sebesar 35 W/m2. Berdasarkan hasil perhitungan dengan worksheet, didapatkan nilai OTTV Gedung Agape sebesar 49,06 35 W/m2, cukup jauh dari standar SNI. Beberapa strategi untuk menekan nilai OTTV dicoba disimulasikan melalui modifikasi material bukaan dan penyesuaian window to wall ratio, sehingga pada akhirnya dapat mencapai 34,86 W/m2.EVALUATION OF BUILDING ENVELOPE PERFORMANCE ON AGAPE BUILDING UNIVERSITAS KRISTEN DUTA WACANA YOGYAKARTA In response to the worldwide issue about climate change and global warming, architecture should play a role to protecting the environment by presenting high performance building designs. This kind of building can provide optimal comfort for its occupants without sacrificing the quality of the surrounding environment. The character of Indonesia's tropical climate, causes high environmental temperatures, thus potentially causing discomfort for building occupants. The effort to increase comfort will certainly require high energy consumption, so it is necessary to consider about energy conservation strategies to minimize negative impact on the environment. As a part of Universitas Kristen Duta Wacana area, Agape is an office building that uses air conditioning system. After being used for 12 years, this building has a satisfactory evaluation about the thermal comfort from the occupants. However, it is believed that the building still has considerable potential of energy saving through the performance of the building envelope. This study aims to evaluate performance of Agape Building’s envelope in term of heat transfer reduction and determine strategies that can be applied to reduce the Overall Thermal Transfer Value (OTTV) value to support energy conservation. Indonesian National Standards (SNI) about building’s energy conservation determine a maximum OTTV value of 35 W/m2. Based on calculation, the OTTV value of Agape Building was obtained 49,06 W/m2, has not been able to reach the SNI standard. Several strategies to reduce the OTTV value have been simulated by modifying the opening material and adjusting the window to wall ratio, so that in the end the OTTV value could meet the standards, 34,86 W/m2.
Pengaruh Setting kawasan Tamansari terhadap Temperature Humidity Index Astuti, Adindra Maharsi Kusuma; Feriadi, Henry
ATRIUM: Jurnal Arsitektur Vol. 10 No. 3 (2024): ATRIUM: Jurnal Arsitektur
Publisher : Lembaga Penelitian dan Pengabdian pada Masyarakat (LPPM) Universitas Kristen Duta Wacana Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21460/atrium.v10i3.275

Abstract

Title: The Effect of Environmental Setting of Tamansari on Temperature Humidity Index Geometric shape, land cover type, and density impact increasing global temperature and microclimate comfort. Tamansari was originally a park, garden, and bathhouse for the King and his family.  Today, Tamansari is a heritage tourism area surrounded by dense residential areas in the middle of Yogyakarta City. This study aims to determine how the setting of the Tamansari area affects changes in temperature and relative humidity, which impact changes in the Temperature Humidity Index (THI) on the micro-scale of the Tamansari area. The method used is descriptive quantitative analysis, and calculation analysis was performed using the (THI) equation. The study results showed that the THI value in the Tamansari area was uncomfortable, with a THI value of 27.77-32.52°C. Building coverage ratio, population, and human activities affect the THI value. The THI value can also change due to weather factors that affect the physical condition of the area, especially in open areas.