Utilization of a Latent Heat Storage for Waste Heat Recovery from an Aluminum Die Casting Plant and the Supply of Preheating and Heat Treatment Furnaces with Stored Heat

DOI

10.2991/978-94-6463-156-2_22How to use a DOI?

Keywords

Aluminum die casting; waste heat recovery; preheating; energy efficiency; simulation; latent heat storage; phase change material

Abstract

Aluminum die casting is an important industrial process and due to melting very energy intensive. Currently, there is a lot of unused waste heat from moulding and cooling in the casting cell. This represents the source of waste heat utilization in this paper. A preheating furnace act as a proper and large enough heat sink. Hence waste heat supply and demand not always coincide a latent thermal energy storage is used to close this gap, utilizing the melting and crystallization enthalpy of the storage medium, the phase change material (PCM). For waste heat recovery and continuous preheating, we designed a system consisting of PCM storage and preheating furnace. At the laboratory at the Austrian Institute of Technology (AIT) there is a PCM storage unit, where experiments can be carried out. As a first step a simulation model was developed using Modelica/Dymola, where thermal oil is used to utilize the waste heat from die casting to preheat aluminum ingots. Simulation results showed that with this system energy savings of 10 to 15% can be achieved and even be surpassed by further optimization. With higher waste heat temperatures (up to 300 ℃) and therefor higher preheating temperatures, and an optimally interconnected system of larger PCM storages, energy savings up to 30% seem possible.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Philipp Moser
AU  - Christoph Zauner
AU  - Bernd Windholz
AU  - Michael Lauermann
PY  - 2023
DA  - 2023/05/25
TI  - Utilization of  a Latent Heat Storage for Waste Heat Recovery from an Aluminum Die Casting Plant and the Supply of Preheating and Heat Treatment Furnaces with Stored Heat
BT  - Proceedings of the International Renewable Energy Storage  Conference (IRES 2022)
PB  - Atlantis Press
SP  - 322
EP  - 335
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-156-2_22
DO  - 10.2991/978-94-6463-156-2_22
ID  - Moser2023
ER  -