Energetic analysis of a novel vehicle power and cooling/heating cogeneration energy system using cascade cycles. (15th March 2015)

• Record Type: Journal Article
• Authors: Yue, Chen; Han, Dong; Pu, Wenhao; He, Weifeng
• Is Part Of: Energy. Volume 82(2015)
• Page Start: 242
• Page End: 255
• Publication Date: 2015-03-15
• Subjects: Vehicle engine -- Waste heat recovery -- Cogeneration system -- Slide-temperature -- Thermal match; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2015.01.035
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: This study proposes and investigates a novel VCES (Vehicle power and cooling/heating Cogeneration Energy System), including a topping vehicle engine subsystem, and a bottoming waste-heat recovery subsystem which uses the zeotropic working fluid. The various grade exhaust and coolant waste-heat of the topping subsystem are cascade recovered by the bottoming subsystem, and slide-temperature thermal match in waste heat recovery heat exchangers and the condenser is considered also, obtaining power output and cooling/heating capacity. Based on the experimental data from an actual vehicle's energy demands and its waste-heat characteristics, the proposed VCES (vehicle cogeneration energy system) model is built and verified. Using ammonia-water as working fluid of the bottoming subsystem, integrated thermodynamic performances of the VCES are discussed through introducing three variables: an ambient temperature, the vehicle's velocity and the number of seated occupants. The influence of above three variables on the proposed VCES′ overall thermodynamic performance is analyzed by comparing it to a conventional VCES, and suitable operation conditions are recommended under cooling and heating conditions. Highlights: A novel vehicle cogeneration energy system is proposed. Slide-temperature thermal match at two levels are considered. Integration of the topping vehicle engine and bottoming waste heat recovery cycle is designed. The cogeneration system model is built and verified based on experimental data. Energy-saving potential of the proposed system is investigated.