Schlüsselwörter
(Englisch)
|
Heat pumping, industrial, efficiency, valorisation, energy
|
Kurzbeschreibung
(Englisch)
|
With the help of the Swiss Federal Office of Energy, the IPESE group at EPFL under the leadership of Professor François Maréchal will explore new horizons for industrial heat pumping in industry and also participate in IEA annex 48 regarding industrial heat pumps on behalf of Switzerland. In collaboration with the SCCER-EIP, the goal is to develop new methods to improve industrial energy efficiency and mitigate CO2 emissions by the proper integration of industrial heat pumps and investigate the role of industrial heat towards the goals of the energy transition 2050. The proposed research integrates innovative concepts of industrial heat pumps considering progress in working fluids, heat exchange, multistage systems, compression and expansion technologies using optimisation methods and process integration techniques.
|
Kurzbeschreibung
(Französisch)
|
Avec l’aide de l’Office fédérale de l’énergie, le groupe de recherche IPESE de l’EPFL, sous la direction du Professeur François Maréchal va explorer de nouvelles pistes pour l’intégration de pompes à chaleur dans l’industrie et participer à l’annexe 48 de l’IEA sur la thématique des pompes à chaleur industrielles en tant que représentant de la Suisse. En collaboration avec le SCCER-EIP, le but est de développer de nouvelles méthodes pour améliorer l’efficacité énergétique industrielle et réduire les émissions de CO2 par l’intégration de pompe à chaleur industrielle et évaluer la contribution des pompes à chaleur industrielles aux objectifs de la transition énergétique 2050. L’axe de recherche proposée intègrent des concepts innovants de pompes à chaleur industrielles, tels que les travaux sur les fluides thermodynamiques, les configurations multi-étagée, les échanges de chaleur, la compression et la détente, en utilisant des méthodes d’optimisation et de l’intégration des procédés.
|
Schlussbericht
(Englisch)
|
Heat pumping is gaining increasing attention, not only for household applications, but for improving industrial energy efficiency through waste heat recovery and valorisation at elevated temperatures [1, 2]. Through systematic heat pump integration, the environmental impact of industrial processes can be reduced by improving process efficiency and increasing electrification to meet the goals of the Swiss energy transition.
However, if integration is not performed correctly the environmental impact may actually be increased. Although the theory, technical realisation, and economic benefits of correctly integrated industrial heat pump systems have been successfully demonstrated [2–4], application on a broad scale is still lacking [5]. The reasons for marginal penetration of well-integrated systems (disregarding standard industrial refrigeration and HVAC applications) were identified in the following four points [2, 5].
1. A general need for clarification of theoretical principles and available tools together with comprehensive methods
2. Raising of awareness and training of planners and engineers
3. Proof-of-concept through (more) publicly available best reference examples
4. A need for estimates of heat pump integration potentials to identify the most promising industries for application
The underlying SFOE-supported project which also participated in the IEA HPT Annex 48 (Phase II) has addressed points (1), (2), and (4). Point (3) was addressed in a partnered SFOE project1. Point (1) was treated by providing an overview of the theoretical principles, useful methods and commercially available tools for correct heat pump integration. A set of integration guidelines was developed, which were demonstrated on a case study. The results are detailed in background: theoretical principles & useful tools (section 2) and in the IEA HPT Annex 48 final report and were further presented in numerous conferences, thereby addressing point (2). It could be demonstrated that a variety of tools are available for diverse levels of expertise and that the use of simple principles can already generate important improvements in terms of energetic efficiency and environmental impact compared to a "naive" approach.
From the analysis of tools, it resulted that further developments for integrated heat pump design tools were necessary to realise their full potential. Therefore, further addressing point (1), a novel industrial heat pump design tool was developed throughout this project which is presented in software development: integrated design tool (section 3). The developed tool enables optimal integrated industrial heat pump design considering heat pump features in a comprehensive manner, as well as fluid and compressor selection. The method was benchmarked on reference cases from the literature
[6–8] yielding between 5 and 30% improvements compared to the previously optimal solutions by considering a more comprehensive list of heat pump features. In response to point (4), the developed tool was used to estimate the saving potentials through heat recovery (HR) and heat pump integration in various industrial sectors, which is described in swiss potentials (section 4). It was found that the main carbon dioxide equivalent (CO2-eq.) emission reduction potentials through HR and heat pump integration are achievable in the food & beverage sector, yielding improvements of 25% (conservative: no extrapolation) or 58% (optimistic: extrapolation). This is followed by the chemical sector, where 90% of the saving potentials are achieved through heat recovery (HR), reaching between 21 (conservative) and 74% (optimistic). For the entire industrial sector, improvements of 6%-47% could be achieved through HR, while 3%-21% additional savings could be unlocked by heat pump (HP) integration, amounting to a total of 9%-68% reduction potential in CO2-eq. emissions. This highlights a large uncertainty related to the diversity of the industrial sector. These findings also reveal a large uncharted potential which should be explored in more detail.
Zugehörige Dokumente
|
