A novel waste heat powered system is proposed to meet heating, cooling and refrigeration demands on a container ship to reduce its fuel consumption. A cascaded absorption-compression configuration is adopted to meet cooling and refrigeration demands simultaneously. Major components such as sea route weather, vapor compression cycle reefer units and main engine are modeled in details. The system is simulated under transient sea route weather conditions and loading/unloading conditions, and compared with the conventional system design. The conventional system simulation results are validated against experimental data with coefficient of variation of the root mean square error less than 30%. Simulation results revealed the proposed waste heat powered system is able to reduce diesel generator's fuel consumption by 38% and hot climate are in favor of fuel savings. Sankey diagram is used to analyze energy and CO2 emission flows of both systems. It is concluded that direct emissions from diesel generators are the dominant factor in both systems. Replacing the conventional system with the waste heat powered system has negligible effects on the main engine fuel consumption for propulsion but reduces life cycle cost by 12%.
Bibliographical noteFunding Information:
This work was supported by sponsors of the CEEE, University of Maryland , College Park, MD, Samsung Heavy Industry , and the National Research Foundation of Korea grant funded by the Korea government (MEST) through GCRC-SOP (Grant No. 2012-0004782 ).
© 2016 Elsevier Ltd.
- Cascaded cooling
- Container ships
- Energy saving
- Vapor compression cycle
- Waste heat
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Modelling and Simulation
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Energy Engineering and Power Technology
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Management, Monitoring, Policy and Law
- Electrical and Electronic Engineering