Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5444241 | Energy Procedia | 2017 | 8 Pages |
Abstract
In this paper, we focus on the effect of the pinch-point-temperature difference (âTpinch) on the plant performance. âTpinch is directly related with the size and cost of the heat exchangers and strongly influences the preheating-effect, which is the most characteristic feature of the Preheat-parallel configuration. First, we present the results of a detailed sensitivity analysis of âTpinch. A higher âTpinch results in a lower preheating-effect, a lower net power output and, correspondingly, lower plant efficiency. Furthermore, we compare the performance of the Preheat-parallel configuration with the convenient parallel and series CHP configurations. For all three configurations, the performance decreases with an increase of âTpinch. For the considered thermal network requirements, the net power generation is the highest for the Preheat-parallel configuration. With respect to the parallel configuration, the gain in net power generation stays approximately constant (75°C/35°C TN) or decreases (75°C/50°C TN) with the imposed pinch-point-temperature difference. With respect to the series configuration, the gain in net power generation increases for a higher value of âTpinch. This means that the impact of âTpinch is the biggest for the series configuration, followed by the Preheat-parallel configuration, and that the impact on the performance of the parallel configuration is the smallest.
Related Topics
Physical Sciences and Engineering
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Energy (General)
Authors
Sarah Van Erdeweghe, Johan Van Bael, Ben Laenen, William D'haeseleer,