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KAJIAN NUMERIK DISTRIBUSI UDARA PADA RUANG BER-AC UNTUK MENCAPAI TINGKAT EFISIENSI ENERGI YANG OPTIMAL (Numeric Analysis Of Air Distribution In Air-Conditioned Room To Obtain Optimum Energy Effeciency Level) Seputra, Jackobus Ade Prasetya
ARTEKS Jurnal Teknik Arsitektur Vol 3, No 1 (2018)
Publisher : Program Studi Arsitektur Fakultas Teknik Universitas Katolik Widya Mandira, Kupang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30822/artk.v3i1.153

Abstract

The demand for household energy in Indonesia is dominated by air conditioning sector. One of the efforts to optimize air conditioner (AC) is to figure out the best air distribution pattern. Nowadays, there are three air distribution types of marketed AC; (1) perfect mixing, (2) displacement, and (3) radiant cooling. This research examines the influence of those types toward energy consuption to ensure indoor thermal comfort.  It was conducted by conducting literature review, mathematical calculation, and numerical simulation. Based on SNI 03-6572-2001, the research applied comfort criteria of indoor air temperature of 24oC as setpoint with 28.1oC initial temperature. Energy consumption is estimated based on time required to achieve the setpoint. The fastest cooling time is obtained by displacement in 80 seconds, then perfect mixing in 112 seconds, and the longest is radiant cooling in 460 seconds. Energy calculation establishes three scenarios of heat load represented by air con’s idle time; (a) high load, 30 seconds, (b) moderate load, 60 seconds, and (c) low load, 90 seconds. For 300 hours of operational time per month, displacement consumes (a) 148.4, (b) 116.6, and (c) 96 kWh/month, whilst perfect mixing needs (a) 160.9, (b) 132.8, and (c) 113.1 kWh/month. Lastly, radiant cooling spends (a) 191.5, (b) 180.5, and (c) 170.6 kWh/month. Keywords: energy efficiency, air conditioning, air distribution pattern 
EVALUASI PERFORMA VENTILASI ALAMI PADA DESAIN BUKAAN RUANG KELAS UNIVERSITAS ATMA JAYA YOGYAKARTA Seputra, Jackobus Ade Prasetya
Jurnal Arsitektur Komposisi Vol 10, No 3 (2013): Jurnal Arsitektur KOMPOSISI
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1608.348 KB) | DOI: 10.24002/jars.v10i3.1111

Abstract

Abstract: Education is an important sector of a nation toward better future. Conducive classroom with well designed room ventilation would encourage occupants in implementing effective teaching and learning activities. Research was conducted to figure out classroom performance and optimization of natural ventilation which was occurred in Engineering Faculty of UAJY represented by the classroom number 2406 as case study. Research is focused on classroom ventilation elements by examining window’s dimension, occupant’s adaptive behavior, opening types, and glass type at windward side. This research implements rationalistic method by utilizing computer simulation software DesignBuilder complemented with CFD in order to analyze and deduce information obtained primarily by field measurement and other relevant literatures. Results generated by DesignBuilder show that changes in ventilation area at external windows have significant influence over room’s ventilation performance. CFD (Computational Fluid Dynamics) experiments were conducted by examining opening types shown on room’s vertical section drawing, opening positions, overhangs, and external louvre types. Results show that experiments conducted by replacing the bottom layer of fixed windows with operable windows has significant effect in improving ventilation performance. Variation on overhangs only produce little impact, yet experiments on external louvres prove that the best type is horizontal louvre. Optimization done by studying above variables is capable to increase ventilation performance up to 800% in examined classroom.Keywords: ventilation, optimization, room openings, computer simulationAbstrak: Sektor pendidikan adalah tulang punggung suatu bangsa demi menuju masa depan yang lebih baik. Ruang kelas yang berkualitas dan kondusif dengan perencanaan sistem ventilasi dalam ruang yang baik bagi kegiatan belajar mengajar akan membantu tercapainya tujuan tersebut. Penelitian ini dilakukan untuk mengetahui sejauh mana performa ventilasi alami ruang dengan studi kasus Ruang Kelas 2406 Gedung Fakultas Teknik UAJY dan bagaimana bentuk optimasinya. Penelitian berfokus pada elemen bukaan dengan berbagai dimensi jendela, pengaturan adaptif penghuni, jenis bukaan ventilasi pada jendela, serta jenis kaca jendela pada sisi windward (angin datang). Metode simulasi komputer diperkuat dengan pengukuran lapangan menjadi alat bantu menakar dan mengoptimalisir kebutuhan ventilasi alami melalui berbagai variasi desain bukaan. Hasil studi dengan DesignBuilder memperlihatkan bahwa variabel luasan ventilasi pada jendela (“external window open”) memiliki pengaruh besar terhadap performa ventilasi alami dalam ruang. Studi dengan CFD (Computational Fluid Dynamics) berfokus pada model bukaan ruang, yaitu model bukaan pada potongan vertikal ruang, posisi bukaan, tipe teritisan (“overhang”) serta kerai (“louvre”) eksternal. Eksperimen pada posisi bukaan inlet menunjukkan bahwa perubahan jendela mati menjadi jendela hidup pada lapis bawah menghasilkan performa ventilasi lebih baik. Studi teritisan tidak memiliki pengaruh besar, sedangkan studi kerai membuktikan bahwa jenis kerai terbaik adalah kerai horisontal. Optimasi ini mampu meningkatkan performa ventilasi hingga 800% pada studi kasus.Kata kunci: ventilasi, optimasi, bukaan ruang, simulasi komputer
Redesain Kompleks Kantor Kelurahan Desa Caturharjo, Kabupaten Bantul dengan Pendekatan Arsitektur Lokal Seputra, Jackobus Ade Prasetya
Jurnal Riset Daerah Vol 22 No 1 (2022): JURNAL RISET DAERAH
Publisher : Badan Perencanaan Pembangunan Daerah Kabupaten Bantul

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64730/jrdbantul.v22i1.20

Abstract

The objective of this community service is to establish high performance and comfortable local administrative office in Caturharjo Village, Bantul, Special District of Yogyakarta. This program is intended to better accomodate current activities by redesigning local village office complexes in 2021. The design requirements are conserving existing building mass to minimize construction cost and implementing Javanese traditional style to enhance local identity as well as to fulfill new government’s rule demanding every state office should implement uniform architectural syle reflecting its local values. To achieve these goals, parametric study using Rhinoceros - Grasshopper is conducted to determine the best site layout when new building mass and parking area are added. Moreover, indoor room layout and building facades are designed conservatively by drawing digital sketches with local Javanese style. Keywords: Local Architecture, Parametric Study, Space Planning.
Desain Kawasan Wisata Tanggap Pandemi Melalui Pendekatan Klimatis di Puncak Gadhung Mlaten, Desa Caturharjo, Kecamatan Pandak, Kabupaten Bantul Seputra, Jackobus Ade Prasetya; Mahendarto, Trias
Jurnal Riset Daerah Vol 21 No 3 (2021): JURNAL RISET DAERAH
Publisher : Badan Perencanaan Pembangunan Daerah Kabupaten Bantul

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64730/jrdbantul.v21i3.55

Abstract

"Pengabdian pada Masyarakat" (Community Service) at Puncak Gadhung Mlaten, Caturharjo Village, Pandak, Bantul, Yogyakarta is conducted as an endeavor to mitigate the impact of COVID-19 pandemic. This program is commenced in August 2020 when Indonesian tourism was in hiatus due to domestic travel restrictions and public hesitations to undergo outdoor activities. As a response, local authorities of Caturharjo Village introduce the concept of pandemic responsive tourism to recover public confidence of traveling outside and be able to visit their village. This attempt is intended to reduce unemployment rate and increase residents' welfare. This service is directed in four steps, there are (1) problem identification and definition, (2) literature study of pandemic responsive design from climate perspective, (3) implementation of climatic findings using ENVI-met v4 as problem solver, and (4) formulating pandemic responsive tourism area. The output of this process is design of Puncak Gadhung Mlaten Tourism Area, Caturharjo Village, Pandak, Bantul, Yogyakarta by fulfilling pandemic responsive and thermal comfort criteria as; air temperature below 28oC, relative humidity between 70-75%, sun hours on public areas above 30 minutes, and wind speed more than 1 m/s.