Real-time modelling of a two-unit baseline air conditioning system for a generic bus subjected to different levels of occupancy

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Abstract

A dynamic model was adopted to analyze the impact of the occupancy level in a generic bus on the air conditioning (AC) performance, under different control strategies. The dynamic model was built up by coupling two sub-models of an AC system and the cabin, using MATLAB and Simscape toolbox (R2019a). The AC system has two units, which are controlled independently and based on a Vapour Compression Cycle (VCC). The cabin is modelled by means of moisture air networks, exchanging heat with the refrigerant through the evaporator/condenser of the AC units. Five different strategies were investigated for a range of occupancy levels from 5 to 70 people on board. Results show the links between the occupancy level, power, and discomfort level with the implemented control strategies. As the results suggest, adopting a multi-unit AC system would be more advantageous than using a single unit in terms of the discomfort level and power requirement.
Original languageEnglish
Title of host publication2020 Fifteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)
Publisher IEEE
Number of pages6
DOIs
Publication statusPublished - 02 Nov 2020

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