DESAIN SISTEM PENGONDISIAN UDARA BUS UNTUK MENGURANGI PENULARAN PENYAKIT YANG DITRANSMISIKAN MELALUI UDARA

• Main Author: Izzuddin, Ahmad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/57731
• Institution: Institut Teknologi Bandung

COVID-19 that causes a worldwide pandemic can be transmitted through droplets, airborne, fomite, and other modes. The human need for transportation during a pandemic still exists. And buses are among the most widely used modes of transportation. The user of a public bus is prone to be infected by airborne transmission in public. To anticipate the airborne transmission of COVID-19, ASHRAE recommends some engineering advice for the air conditioning system. Designing air conditioning systems begins with calculating the cooling load with radiant time series methods (RTSM). From the cooling load, the minimum supply air and outdoor air is obtained to meet the standards of ASHRAE 62.1. Redesigning the air duct is performed to minimize airborne transmission. After that, analyze the designed bus air conditioning system for airborne disease transmission and thermal comfort. From the observations, the current bus air conditioning system uses filters below the ASHRAE minimum recommendation, with a filtration efficiency of 12-20% for virus particle size. The current bus air conditioning system also allows for cross-contact infection due to airflow. The total cooling load of the bus is 14.669 Watts, and the evaporator cooling load is 31,1 kW. This total cooling load is still able to be fulfilled by the current rooftop unit. Improved filters on the design bus meet ASHRAE recommendations with a filtration efficiency of 62-82%. Airflow on the designed bus can minimize the spread of disease by reducing cross-contact between passengers. The thermal comfort of the designed bus also has been fulfilled.