Dynamic analysis of 100 kW scale organic Rankine cycle with various operating conditions

Name: Kim, Eo-Jin

Organization : Pukyong National University

Name: Son, Chang-Hyo

Organization : Pukyong National University

Name: Seol, Sung-Hoon

Organization : Pukyong National University

Name: Yoon, Jung-In

Organization : Pukyong National University

Email : yoonji@pknu.ac.kr

keyword: Organic Rankine cycle

LCSH: Power plants -- Performance

; Dynamic analysis (Engineering)

LCSH: Thermodynamics

LCSH: Energy conversion

Abstract: Carbon reduction movements to address greenhouse gas emissions from ships are being accelerated by the International Maritime Organization. Recently, indicators for carbon depletion such as the energy efficiency design index, and Carbon Intensity Indicator were implemented for the majority of ongoing vessels. As a solution to such regulations, several studies focused on the application of a waste heat recovery system to deplete carbon emission from ships. Many studies highlighted the organic Rankine cycle as a promising waste heat recovery system for ships, as the waste heat temperature range is suitable for low- to medium-range working fluids. Thus, many studies have focused on analyzing the performance characteristics of the organic Rankine cycle at its static state. These studies have prevailed intuitive results on selection of working fluids, and performance comparison of various cycles. However, certain limitations exist as the operating characteristics in the process of converging to a steady state cannot be examined. Accordingly, this paper carried out the design and analysis of a dynamic model for a 100 kW organic Rankine cycle system by developing the static state model derived from previous research. The designed organic Rankine cycle system consists of a basic organic Rankine cycle with an internal heat exchanger and 2 radial turbines for performance improvement. R1233zd(E) was used as the working fluid, which holds strength in both the low global warming potential and system performance, derived from the previous study. For the analysis, dynamic behaviors of the system with heat source (steam) supply temperature from 165 to 180°C, and heat sink temperature from 5 to 35°C were examined. Results showed that the enthalpy balance converged first, then followed by the mass and composition balance to secure the superheat degree of the cycle.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2024

Modified: 2025-08-19

Issued: 2025-08-19

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BibliograpyCitation : In Thai Society of Mechanical Engineers (TSME) and Kasetsart University (KU). The 14th TSME International Conference on Mechanical Engineering (TSME-ICoME14 2024) (TSF0003). Chonburi : Kasetsart University Sriracha Campus, 2024

eng

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