STUDY ON KALINA CYCLE PERFORMANCE UNDER OPERATING TEMPERATURE VERIATIONS FOR SHIP WASTE HEAT RECOVERY

Thashya Nabila Aqeela, . (2026) STUDY ON KALINA CYCLE PERFORMANCE UNDER OPERATING TEMPERATURE VERIATIONS FOR SHIP WASTE HEAT RECOVERY. Study on Kalina Cycle Performance Under Operating Temperature Variations for Ship Waste Heat Recovery, 11 (2). pp. 517-525. ISSN 2548-1479

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Abstract

Energy inefficiency in marine diesel engines remains a significant challenge due to substantial waste heat losses. This study aims to evaluate the thermodynamic performance of a Kalina cycle for waste heat recovery from a low-speed marine diesel engine under varying operating temperature and ammonia-H2O compositions. A thermodynamic model is developed based on mass and energy balance principles to analyze system behavior under different conditions. The analysis focuses on key performance parameters, including evaporator heat input (Qin), pump work, expander work, thermal efficiency, and energy losses for ammonia concentrations of 30%, 45%, and 60%. The results show that increasing ammonia concentration significantly reduces the required heat input, while expander work decreases with rising condenser temperature due to a reduced enthalpy drop. Thermal efficiency decreases with increasing evaporator temperature, as additional heat input is not effectively converted into useful work, resulting in greater irreversibility. The highest efficiency of 11.9% is achieved at 60% ammonia concentration under lower temperature conditions. In contrast, energy losses increase consistently with higher heat input, particularly at elevated temperatures. The performance of the Kalina cycle is strongly influenced by operating temperatures and working fluid composition, providing insight for optimizing the marine waste heat recovery system.

Item Type:	Article
Additional Information:	[No. Panggil: 2210313063] [Pembimbing 1: Fajri Ashfi Rayhan] [Pembimbing 2: Fathin Muhammad Mahdhudhu]
Uncontrolled Keywords:	Kalina cycle; Ammonia-H2O mixture; thermal efficiency; waste heat recovery
Subjects:	V Naval Science > V Naval Science (General) V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Divisions:	Fakultas Teknik > Program Studi Teknik Perkapalan (S1)
Depositing User:	THASHYA NABILA AQEELA
Date Deposited:	27 Aug 2026 03:04
Last Modified:	27 Aug 2026 03:04
URI:	http://repository.upnvj.ac.id/id/eprint/52340

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