Electronic Theses and Dissertation

Tingginya ketergantungan pada sistem pendingin konvensional telah menyebabkan peningkatan konsumsi energi dan emisi karbon di sektor perumahan Indonesia, terutama pada rumah sederhana tipe 36. Penelitian ini melakukan kajian eksperimental untuk membandingkan kinerja sistem Earth-Air Heat Exchanger (EAHE) dengan ventilasi alamiah dalam menciptakan kenyamanan termal. Eksperimen dilakukan pada rumah tipe 36 di Gampong Kajhu, Aceh Besar, dengan menganalisis pengaruh laju aliran udara 0,09 m³/s terhadap performa termal sistem. Data suhu tanah pada kedalaman 0,2-1,0 m, suhu udara inlet-outlet EAHE, suhu ruangan, dan konsumsi energi blower dikumpulkan selama periode operasional pukul 09.00-17.00 WIB. Hasil penelitian mengungkapkan bahwa EAHE mampu menurunkan suhu udara lingkungan secara signifikan hingga 5,52°C dan mempertahankan suhu keluar yang stabil pada 30-32°C. Sistem ini mencapai efektivitas termal 0,998 dan nilai Coefficient of Performance (COP) 2,4, menunjukkan efisiensi energi yang sangat baik. Analisis ekonomi menunjukkan konsumsi energi blower hanya 2,992 kWh/hari dengan biaya operasional Rp 1.241/hari, menjadikan EAHE solusi yang ekonomis untuk rumah tipe 36. Kedalaman tanah 0,8-1,0 m terbukti optimal dengan stabilitas suhu 30-31°C. Disimpulkan bahwa EAHE secara signifikan lebih unggul dalam menstabilkan suhu
ruangan dan menciptakan kenyamanan termal dibandingkan ventilasi alamiah, khususnya pada kondisi beban panas puncak di siang hari. Temuan ini mendukung implementasi EAHE sebagai solusi pendinginan pasif yang berkelanjutan untuk perumahan sederhana di iklim tropis Indonesia.

The high reliance on conventional cooling systems has led to increased energy consumption and carbon emissions in the Indonesian housing sector, especially in low-cost type 36 houses. This study conducted an experimental study to compare the performance of an Earth-Air Heat Exchanger (EAHE) system with natural ventilation in creating thermal comfort.The experiment was conducted in a type 36 house in Gampong Kajhu, Aceh Besar, analyzing the effect of an air flow rate of 0.09 m³/s on the system's thermal performance.Data on ground temperature at a depth of 0.2-1.0 m, the EAHE inlet-outlet air temperature, room temperature, and blower energy consumption were collected during the operational period from 9:00 AM to 5:00 PM Western Indonesian Time. The results revealed that the EAHE was able to significantly reduce ambient air temperature by up to 5.52°C and maintain a stable outlet temperature of 30-32°C. The system achieved a thermal effectiveness of 0.998 and a Coefficient of Performance (COP) of 2.4, demonstrating excellent energy efficiency. Economic analysis showed that the blower energy consumption was only 2,992 kWh/day with an operational cost of Rp 1,241/day, making EAHE an economical solution for a type 36 house. A soil depth of 0.8-1.0 m proved optimal with a temperature stability of 30-31°C. It was concluded that EAHE was significantly superior in stabilizing room temperature and creating thermal comfort compared to natural ventilation, especially under peak heat load conditions during the day. These findings support the implementation of EAHE as a sustainable passive cooling solution for low-cost housing in Indonesia's tropical climate.