Exergoeconomic analysis and optimization of a new combined power and freshwater system driven by waste heat of a marine diesel engine. (1st August 2020)

• Record Type: Journal Article
• Authors: Feili, Milad; Ghaebi, Hadi; Parikhani, Towhid; Rostamzadeh, Hadi
• Is Part Of: Thermal science and engineering progress. Volume 18(2020)
• Publication Date: 2020-08-01
• Subjects: Absorption power cycle (APC) -- Humidification-dehumidification desalination (HDH) unit -- Thermodynamic -- Exergoeconomic -- Optimization; Heat engineering -- Periodicals; Heat engineering; Thermodynamics; Periodicals; 621.402
• DOI: 10.1016/j.tsep.2020.100513
• Languages: English
• ISSNs: 2451-9049

Abstract

Highlights: An integration of APC and HDH systems is proposed for power and freshwater generation aims. Comprehensive thermodynamics and thermoeconomic analysis are carried out. The Genetic algorithm is applied for single-objective and multi-objective optimization purposes. A precise parametric analysis is performed to determine some main parameters effect on the performance metrics. The proposed cogeneration system is able to produce 13.03 kW mechanical power and 0.235 k g s - 1 fresh water. Abstract: To recover waste heat of a marine diesel engine (MDE), a cogeneration system is proposed to provide the required power and freshwater of the crew. The new devised unit includes an absorption power cycle (APC) and a humidification-dehumidification desalination (HDH) unit. The energy needed for simultaneous production of power and freshwater is provided through recycling the dissipated heat of the jacket water and exhaust gases of the MDE. Using genetic algorithm procedure via multi-objective optimization, the optimum first-law and second-law efficiencies and sum unit cost of product (SUCP) of the system are computed 91.84 %, 24.33 % and 192.7 $ . G J - 1, respectively. Also a precise parametric analysis is performed to discern the behavior of the objective functions by altering the input parameters.