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All Journal G-Tech : Jurnal Teknologi Terapan Jurnal Indonesia Sosial Teknologi
Dian Ariestadi
Universitas Negeri Malang, Indonesia
Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences

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Analysis of Cooling Energy Efficiency in Optimizing the Façade Design of the Emergency Unit of RSUD Ar Rozy Kota Probolinggo Ghina Nabiel Sukma; Dian Ariestadi
G-Tech: Jurnal Teknologi Terapan Vol 9 No 4 (2025): G-Tech, Vol. 9 No. 4 October 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v9i4.8259

Abstract

Electricity consumption in Indonesia has been rising at an average rate of approximately 5% per year, with commercial buildings particularly hospitals accounting for about 23% of this demand. As a continuously operating healthcare facility, RSUD Ar Rozy Kota Probolinggo exhibits substantial cooling energy requirements. Previous studies have shown that approximately 63.9% of hospital energy consumption is attributed to cooling systems, while building façades contribute between 20–50% of total energy use and 50–60% of overall heat gain. This study aims to evaluate the existing façade design of the emergency unit at RSUD Ar Rozy Kota Probolinggo, to identify strategies that can effectively reduce cooling energy consumption. A quantitative approach was employed using computational simulations through the EDGE Buildings software. The analysis involved assessing the energy efficiency of various design modifications, including adjustments to the WWR, the addition of sun shading elements, and the implementation of energy-efficient glazing materials. The results revealed that a façade configuration consisting of a 25.28% WWR, an overhang with an AASF of 0.42, and Stopray Vision 38T glass achieved a reduction in cooling energy consumption of 44.28%, equivalent to 20,680 kWh per month compared to the existing design. This configuration successfully met the EDGE Buildings energy efficiency criteria, achieving total energy savings of 28.74%. Therefore, the proposed façade design is recommended as an optimal retrofit solution to enhance energy efficiency and promote sustainable hospital building design.
Analisis Conceptual Cost Estimation (CCE) untuk Pembangunan Gedung Kuliah Bersama Tambahan (GKB 3) Kevin Abdullah Alrasyid; Dian Ariestadi
Jurnal Indonesia Sosial Teknologi Vol. 6 No. 1 (2025): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v6i1.8790

Abstract

Cost estimation plays a crucial role in ensuring the feasibility and success of construction projects. However, producing accurate estimates, particularly in the early conceptual stages, remains a challenge due to limited information. This study addresses the issue by analyzing the cost estimation process for the construction of the Joint Lecture Building (GKB 3) at State University of Malang. The objective of this study is to provide an accurate and systematic cost estimation to support the construction planning of GKB 3. The study employs a conceptual cost estimation (CCE) method. Data were obtained from field surveys (primary data) and relevant regulatory standards, technical documents, and unit prices (secondary data). Key inclusion criteria include projects categorized under multi-story educational buildings. Analytical descriptive methods were used to process the data. The results indicate that the total building area for GKB 3, spanning nine floors, is 29,932 m², with an estimated cost of IDR 865,037,221,000. This amount includes standard costs, non-standard costs, and Value Added Tax (VAT). Standard costs were calculated using the building's area, multiplying factors, and unit price standards. Non-standard costs, such as installations for air conditioning, elevators, and fire protection systems, were estimated based on regulatory guidelines and their respective percentages of standard costs. In conclusion, the study highlights the importance of employing systematic and regulation-based estimation methods to achieve accurate cost calculations. This approach ensures efficient resource allocation and supports strategic planning for the construction of educational infrastructure.
Co-Authors Ghina Nabiel Sukma Kevin Abdullah Alrasyid