MTC MAN Bus Ac Design

MTC MAN Bus Ac Designing is more than just calculating cooling capacity and drawing blueprints. As a bus air conditioning designer responsible for the Algerian market, you need to design a bus air conditioning system that can conquer Algeria’s harsh environment.

Before designing the MTC MAN Bus Ac, the designer must become an expert in the Algerian climate and market.

Understanding Algeria’s 3 Major Harsh Environmental Factors:

High Temperatures: The design involves external temperatures not the standard 35°C, but 48°C-55°C.

High Dust: Assuming the condenser and evaporator will operate under high dust concentrations, the design must be able to handle frequent blockages.

Large Temperature Variations: The system may need to cope with sub-zero nighttime temperatures (desert regions) and provide heating.

Defining Vehicle and Passenger Needs:

Is it a city bus (frequent starts and stops, doors often open) or a long-distance luxury bus (continuous operation, extremely high comfort requirements)? This determines whether you choose a non-independent or independent air conditioning system.

Algerian buses are typically heavily loaded, so each passenger must be considered a 100W mobile heat source when calculating the load. Passengers may wear traditional robes and have specific preferences for ventilation and temperature.

Developing a Solution – Conceptual Design and System Planning

Establish the Golden Rule of Design: Cooling Capacity Redundancy

Use the standard heat load calculation formula and then multiply the result by a safety factor of 1.3 to 1.5. This means your system’s nominal cooling capacity could be as high as 40 kW or more. This is the only way to combat Algeria’s scorching heat.

Cooling System

The condenser is designed in a “V” shape or angled to facilitate dust removal. Its surface area is 20% larger than conventional designs.

The condenser fan is a high-pressure, high-speed “powerful” fan, ensuring that even at idle, it can effectively “blow through” the dust-covered condenser.

The pre-cooling system includes an optional water spray system that forms a water curtain in front of the condenser. Utilizing the principle of evaporative heat absorption, this significantly reduces the intake air temperature, working exceptionally well in hot, dry climates.

Verification and Testing

The perfect design on paper must prove itself in reality.

CFD Analysis: Simulate airflow within the passenger compartment to ensure even passengers in the last row feel cool; simulate the condenser’s cooling ducts to ensure no hot air backflow.

Structural Simulation: Analyze the fatigue life of the support structure under bumpy road conditions to ensure it won’t break.

Place the prototype in an environmental chamber: Conduct at least 500 hours of durability testing at 55°C and in a dust storm.

BUSCLIMA reminds MTC MAN Bus Ac designers that when using CAD or SolidWorks, they must fully refer to Algerian bus air conditioning design standards. If not, they can visit www.busclima.com or contact busclima@kingclima.com to obtain Chinese bus air conditioning design standards and related design concepts.

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