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All Journal Proceedings of the International Conference on Applied Science and Health Jurnal Medikes (Media Informasi Kesehatan) Science Midwifery Industrial Research Workshop and National Seminar Jurnal Pengabdian Masyarakat Indonesia (JPMI) Obstretika Scientia
Nani Yuningsih
Poltekkes Kemenkes Banten
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Pengaruh Perubahan Temperatur Udara Luar pada Kinerja Pengkondisi Udara Direct Expansion System Akmal Fadhillah Muslim; Sumeru; Nani Yuningsih
Prosiding Industrial Research Workshop and National Seminar Vol. 16 No. 1 (2025): Vol. 16 No. 1 (2025): Prosiding 16th Industrial Research Workshop and National
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v16i1.6636

Abstract

Outdoor air conditions, particularly temperature, are important factors that significantly influence the performance of air conditioning systems in buildings. Fluctuations in outdoor temperature can increase the cooling load and energy consumption of HVAC systems, especially in Direct Expansion (DX) systems commonly used in Air Handling Units (AHU). This study aims to analyze the impact of outdoor temperature changes on the performance of DX-type AHUs. The data collection involved measuring outdoor air temperature, refrigerant temperature and pressure, supply air temperature, electrical power consumption, and calculating the Coefficient of Performance (COP). Measurements were taken in the morning, noon, and afternoon. The results showed that the cooling capacity decreased by 1.274 kW as outdoor temperature rose from 26.25°C to 29.29°C, with an average reduction of 0.44 kW per 1°C. Beyond this range, the cooling capacity stabilized around 30.010 kW. The system’s power input increased by 0.975 kW within the temperature range of 26.25°C to 31.61°C, equivalent to an average increase of 0.182 kW per 1°C. The actual COP declined by a total of 0.29 over the same range, averaging a decrease of 0.05 per 1°C rise in outdoor temperature. These findings indicate that outdoor temperature has a significant effect on the cooling capacity, energy consumption, and Coefficient of Performance DX AHU systems.
Co-Authors Akmal Fadhillah Muslim Ayi Tansah Darti Rumiatun Dewi, Yunita Citra Hani Sutianingsih Holyness Nurdin Singadimedja Kadar Kuswandi Kunlestiowati Hadiningrum Melly Halimatussa'adiah Melyana Nurul Widyawati Nintinjri Husnida Rery Kurniawati Rery Kurniawati Danu Iswantoro Rery Kurniawati Danu Iswantoro Sardjito Sardjito Sardjito Siti Rusyant Siti Rusyanti Siti Samsiyah Purwaningsih Sumeru Yayah Rokayah