A hybrid air-conditioning (A/C) system has been proposed as an alternative energy-efficient solution for marine A/C application using waste-heat-driven dehumidification and a seawater-based evaporative cooler. This paper establishes a mathematical model of a hybrid thermal wheel and evaporative cooling A/C system, by taking the energy consumption characteristics, dehumidification capacity and cooling capacity as the evaluation indexes. The influence of the outdoor temperature and humidity, regeneration air temperature on the overall performance of the system is studied. It is found that the hybrid A/C system has excellent dehumidification and cooling capabilities at high inlet air temperature and humidity as well as high regeneration air temperature. The coefficient of performance (COP) of the hybrid system can reach 13.
Keywords marine air-conditioning, evaporative cooling, thermal wheel, numerical model, energy-saving