The air conditioning (A/C) system is the largest auxiliary load in electric urban buses that operate in tropical climates. Reducing the energy consumption of the A/C system is therefore vital in reducing the energy demand from the traction battery hence improving vehicle range and in reducing the operational costs. This paper focuses on improving the refrigerant side performance by investigating a multi-stage vapour injection cycle. System modelling of the cycles was done in GT-Suite to investigate the improvement in the energy efficiency of the A/C system with multiple vapour injections in comparison to the conventional vapour compression system. The results showed an improvement in coefficient of performance (COP) enhancement of 23 %. Additional challenges of the proposed cycle are discussed to address the feasibility of implementing a multi-stage vapour injection system in urban electric buses.
Investigation of a multi stage vapour-injection cycle to improve air-conditioning system performance of electric buses
2019-05-01
204071 byte
Conference paper
Electronic Resource
English
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