Thermal Energy Storage Integration Based on Pinch Analysis – Methodology and Application

Abstract

Reducing thermal energy use in industry is an effective way to improve energy efficiency. Process integration methods tackle this challenge, of which pinch analysis is a popular approach for identifying direct heat recovery measures. Many processes are batch processes that can profit from indirect heat recovery using thermal energy storage (TES). This paper presents a systematic conceptual TES integration methodology. In addition, functionality to support this methodology has been implemented in the PinCH software and is presented in a case study.

Heat integration of a multi-product batch process by means of direct and indirect heat recovery using thermal energy storage

“…The utility system is also analyzed and optimized at the same time. For this particular case study, the model developed by Olsen et al [20] in the form of a tool called 'PinCH 3.0′ with the support of Swiss Federal Office of Energy (SFOE) is used. The tool employs supertargeting optimization for segregated problems using pinch analysis.…”

“…Walmsely et al [19] continued research on the topic and studied heat storage units for indirect heat integration combined with solar heating to effectively meet the time dependent requirements of multiple heat sources and sinks effectively. Olsen et al [20] further built on the research done by Krummenacher and Favrat [18] as well as Walmsely et al [19] and they presented an extended model which also includes temperature shifting of the streams. The model, as also used in this study, gives greater priority to process streams with longer duration and larger film heat transfer coefficients, ultimately leading to the indirect source/sink profile (ISSP) which is used to estimate the number of volume storage units (VSU) for indirect heat exchange.…”

Optimizing Waste Heat Utilization in Vehicle Bio-Methane Plants

“…Therefore, it was necessary to optimize the performance of the heat exchange network further (See Figure 7), with analyses carried out to evaluate whether: (a) a heat exchanger was passing through the pinch point; (b) there was a cooler exchanger above the pinch point; or (c) there was a heat exchanger below the pinch point [23,24].Two irrationalities in the vehicle bio-methane plant system were identified, the nature of which are described below:…”

ACHEMA 2018 – Energy

“…Ein Werkzeug um Pinch‐Analysen (nicht nur) für diskontinuierliche Prozesse durchzuführen ist die Software PinCH, die von der Hochschule Luzern auf der ACHEMA vorgestellt wurde. Mit der aktuellen Version der Software (PinCH 3.0) steht nun erstmals ein Werkzeug zur Integration von thermischen Energiespeichern (sowohl Wärme als auch Kälte) zur Verfügung . Dies eröffnet zusätzliche Einsparpotenziale für Batchprozesse, mit denen viele Produkte hergestellt werden.…”