Im Zuge der Dekarbonisierung industrieller Produktionssysteme spielt die Elektrifizierung von Prozessen eine wichtige Rolle. Wärmepumpen nehmen dabei aufgrund ihres Funktionsprinzips und der resultierenden Effizienz eine Schlüsselposition ein. Die vergleichsweise komplizierten Einbindungskonzepte und der geringe Bekanntheitsgrad hemmen die weitere Ausbreitung in der Produktion. Dieser Beitrag stellt ein Planungs- und Bewertungstool für Wärmepumpen vor, welches in Produktionssystemen genutzt werden kann.
The electrification of processes plays an important role in decarbonizing industrial production systems. Heat pumps are key due to their operating principle and the resulting efficiency. What prevents a more widespread implementation of this technology in manufacturing is that it is not particularly well-known and rather difficult to integrate. This paper presents a tool for planning and evaluating heat pumps, which can be applied in production systems.
The residential heating sector accounts for a large share of the worldwide annual primary energy consumption. In order to reduce CO2-emissions, it is therefore particularly important to analyse this sector for potential efficiency improvements. In Europe, natural gas boilers are the most widely used heating technology since they are cost-effective and can be installed in any type of building. The energy efficiency of these boilers is already high. However, in their internal process, heat is generated at a high temperature level which is only used for space heating and therefore a high amount of exergy remains unused. This research aims to develop the potential of using the exergy to further improve the efficiency of the systems. A novel combination of methods is applied to analyse the thermodynamic behaviour of gas-fired boilers in detail and over the cycle of a year. The analysis is performed in two steps: In the first step a system is examined in stationary operating points. This is carried out through an experimental setup and a three-dimensional numerical simulation. In the second step, the obtained data is applied to a transient annual building simulation. The results show the temporal distribution and total amount of the annual exergy loss for a common residential building. The exergy loss accumulates to 16,271 kWh per year, which shows the high potential to partially convert the exergy to electrical energy and significantly reduce the external electricity demand and CO2-emissions of the building. Based on this, new technologies such as Thermoelectric Generators can be developed, which can enable this potential.
Durch die Dekarbonisierung industrieller Produktionssysteme und die Stabilisierung der Stromnetze wird die Bereitstellung von Energieflexibilität immer wichtiger. Der Energiebedarf elektrisch betriebener Kompressionskältemaschinen (KKM) kann in Kombination mit thermischen Kältespeichern auf die fluktuierende Erzeugung von erneuerbaren Energien angepasst werden und somit Energieflexibilität bereitstellen. Diese Arbeit bewertet die Funktionalität eines energieeffizienten und energieflexiblen Kältedemonstrators, der diesen Anwendungsfall abbilden soll.
The decarbonization of industrial production systems and stabilization of electricity grids increases the importance of energy flexibility. Electrically operated compression chillers (CCM) can be adapted to the fluctuating generation of renewable energies in combination with a thermal cold storage to provide energy flexibility. This work evaluates the functionality of a laboratory-scale energy-flexible refrigeration demonstrator designed to replicate this use case.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.