| Issue |
MATEC Web Conf.
Volume 223, 2018
The 12th International Conference on Axiomatic Design (ICAD 2018)
|
|
|---|---|---|
| Article Number | 01007 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.1051/matecconf/201822301007 | |
| Published online | 29 October 2018 | |
Recovery of waste heat from engines: an AD view
1
UNIDEMI, CINAV & Escola Naval, Base Naval de Lisboa – Alfeite, 2810-001 Almada, Portugal
2
UNIDEMI & DEMI, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
* corresponding author: cavique.santos@marinha.pt
The Newcomen engine (1705) and the Watt engine (1769) are good examples of coupled and uncoupled designs. The Watt engine had an efficiency of about 3%, a shallow value when compared to engines of nowadays while resulting in a significant increase at those times. According to Axiomatic Design, Watt engine had a better performance than the Newcomen design due to its uncoupled nature. This work aims at applying the same reasoning to choose between new inventions designed for recovering waste heat from engines as to produce work. The most popular of those inventions are the organic Rankine cycle (ORC) and the Kalina cycle. Marine applications use those inventions to improve the efficiency of Diesel engines because the increase of weight of the recovery system does not affect power propulsion. A controversial regarding what system to develop occurred in scientific community as well as in the industry. The application of AD to those cycles classifies ORC as an uncoupled design and the Kalina cycle as a coupled design. Therefore, the ORC might be pondered for future development regarding energy efficiency.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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