Next Article in Journal
Can Transfer Entropy Infer Information Flow in Neuronal Circuits for Cognitive Processing?
Previous Article in Journal
Channels’ Confirmation and Predictions’ Confirmation: From the Medical Test to the Raven Paradox
Open AccessArticle

Endoreversible Modeling of a Hydraulic Recuperation System

Institut für Physik, Technische Universität Chemnitz, 09107 Chemnitz, Germany
*
Author to whom correspondence should be addressed.
Entropy 2020, 22(4), 383; https://doi.org/10.3390/e22040383
Received: 14 February 2020 / Revised: 23 March 2020 / Accepted: 24 March 2020 / Published: 26 March 2020
(This article belongs to the Section Thermodynamics)
Hybrid drive systems able to recover and reuse braking energy of the vehicle can reduce fuel consumption, air pollution and operating costs. Among them, hydraulic recuperation systems are particularly suitable for commercial vehicles, especially if they are already equipped with a hydraulic system. Thus far, the investigation of such systems has been limited to individual components or optimizing their control. In this paper, we focus on thermodynamic effects and their impact on the overall systems energy saving potential using endoreversible thermodynamics as the ideal framework for modeling. The dynamical behavior of the hydraulic recuperation system as well as energy savings are estimated using real data of a vehicle suitable for application. Here, energy savings accelerating the vehicle around 10% and a reduction in energy transferred to the conventional disc brakes around 58% are predicted. We further vary certain design and loss parameters—such as accumulator volume, displacement of the hydraulic unit, heat transfer coefficients or pipe diameter—and discuss their influence on the energy saving potential of the system. It turns out that heat transfer coefficients and pipe diameter are of less importance than accumulator volume and displacement of the hydraulic unit. View Full-Text
Keywords: non-equilibrium thermodynamics; endoreversible thermodynamics; energy recovery; compressible fluid; pressure losses; van der waals fluid; hydraulic systems non-equilibrium thermodynamics; endoreversible thermodynamics; energy recovery; compressible fluid; pressure losses; van der waals fluid; hydraulic systems
Show Figures

Figure 1

MDPI and ACS Style

Masser, R.; Hoffmann, K.H. Endoreversible Modeling of a Hydraulic Recuperation System. Entropy 2020, 22, 383.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop