Feasibility study of an integrated air source heat pump water heater/chillers and exhaust gas boiler heating system for swimming pool on luxury cruise ship

Abstract

As an important recreational water facility on cruise ships, swimming pool brings remarkable energy demand due to the requirement of comfort. In order to reduce the energy consumption during the operation of the swimming pool, this study proposes a hybrid heating system of air source heat pump water heater/chillers (ASHP) and exhaust gas boiler applicable to the cruise ship swimming pool by regarding the parameters of a Vista-class cruise ship resort pool. A simulation model is developed via TRNSYS for a dynamic simulation of energy demand under the predicted climate conditions of cruise line. According to the simulation results, a sizing method based on economy and comfort index is proposed for the capacity of the heat pump. The performance of heat pump partially replaced the existing method is also discussed, which proves the adoption of the ventilation system with variable air volume control can make the variation range of room temperature acceptable during the operation of the heat pump. Under the annual state of navigation and in-port, the proposed system (PS) shows significant economic, energy saving and emission advantages while ensuring comfort level when compared with the existing system (ES) of the same specification, while these advantages will be further expanded with the increase of in-port duration, pool area and service life.