Electric Bus AC

Electric Bus AC depends on vehicle size, heat load conditions, and usage scenarios.

The core objective is to rapidly reduce interior temperature and maintain comfort in high-temperature environments, while balancing energy consumption and range.

Cooling capacity is typically measured in kW (kilowatts). The cooling capacity of mainstream electric bus air conditioners ranges from 20kW to 60kW, with the specific value determined by the following key factors:

I. Core Factors Influencing Cooling Capacity: Vehicle Size and Passenger Capacity
The cooling capacity of an Electric Bus Acoustic is directly proportional to its vehicle length and interior space.

For example, a 10-meter bus (rated passenger capacity of approximately 50) typically requires a cooling capacity of 25kW to 35kW;

while a 12-meter bus (rated passenger capacity of approximately 70) requires 35kW to 50kW.

This is because a larger space means more air needs to be cooled, and passenger heat dissipation (approximately 100W to 150W per person) and fresh air intake (2 to 3 air changes per hour) increase the heat load.

Ambient Temperature and Solar Radiation

In high-temperature summer environments, for every 1°C increase in outside temperature, the required cooling capacity increases by approximately 2% to 3%. For example, in a 35°C environment, the cooling capacity of a 12-meter bus needs to be 15% to 20% higher than in a 25°C environment. Solar radiation is one of the main heat sources; heat entering the vehicle through the roof and windows can reach 10kW to 20kW (depending on the vehicle body color and glass shading rate). Therefore, the cooling capacity design must allow sufficient margin to cope with extreme high temperatures.

Cooling Efficiency and Energy Consumption Balance
The cooling efficiency of Electric Bus Acrylic systems is measured by the Coefficient of Performance (COP, the ratio of cooling capacity to power consumption). The COP of mainstream products is approximately 2.5 to 3.5. For example, a 30kW cooling capacity bus air conditioner consumes approximately 8.5kW to 12kW of power. This energy consumption directly affects the driving range (air conditioning energy consumption can account for up to 21% in summer, WLTP cycle).

II. Cooling Capacity Configuration of Typical Electric Buses in China

The table below lists the reference range of cooling capacity for different levels of Electric Bus Acoustics in China:

Electric Bus The core of AC is “on-demand matching”. Small buses (6-8 meters) focus on lightweight and low energy consumption, with a cooling capacity of about 20kW-28kW; Large buses (10-12 meters) need to prioritize cooling speed, with a cooling capacity of about 25kW-50kW; while articulated buses need to achieve a cooling capacity of 40kW-60kW through dual compressors or large-displacement compressors.