A STUDY OF HEAT EMISSION FROM DIESEL BUSES AND ELECTRIC BUSES AT BUS STOPS IN SINGAPORE

Abstract

This study investigates the comparative heat emissions between diesel and electric buses at bus stops in Singapore, employing experimental data collection and literature reviews. Analyzing temperature data from 225 buses, yielding 12,624 data points, the study aimed to discern potential disparities in heat emission.

Despite observing higher temperatures in electric buses, statistical analyses using Mann- Whitney (p-value = 0.845) and Welch T-tests (p-value = 0.686), failed to furnish substantial evidence to reject the null hypothesis. This indicates no significant difference in heat emission between the two bus types at bus stops. Notably, factors beyond bus type might influence the recorded higher temperatures in electric buses.

The research highlights the complexity of assessing heat emissions from diverse buses, stressing the need for further investigation. Variables like bus models, environmental conditions, idling times, and passenger loads could significantly affect heat emission variations. Thus, controlled studies are crucial for deeper insights into heat generation dynamics at bus stops.

Future research should expand datasets, encompassing various bus models, operational scenarios, and environmental factors. Advanced instrumentation and refined data collection methods can offer nuanced insights into heat emissions, aiding our understanding of environmental impacts and passenger comfort linked to different bus types.

In summary, this study lays a foundation but reveals the intricate nature of heat emissions at bus stops. It emphasizes the necessity for extensive research to comprehensively assess heat emission characteristics between diesel and electric buses in Singapore's context.