| 1. |
- Perera, A. T. D., et al.
(author)
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Impacts of extreme climate conditions due to climate change on the energy system design and operation
- 2019
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In: Energy Procedia. - : Elsevier BV. - 1876-6102. ; 159, s. 358-363
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Conference paper (peer-reviewed)abstract
- Extreme climate events occur more frequently and stronger in the future due to climate change. Maintaining the energy security during extreme conditions is essential to reduce the impacts of extreme climate and avoid disasters. Resilient design of the energy system to resist against extreme climate events are investigated considering four scenarios, namely, typical demand (TD), extreme demand (ED), extreme renewable energy generation (ER) and, extreme demand and renewable generation (EDR). A regional climate model is used to develop the four scenarios with the assistance of a building simulation model. Subsequently, multi-energy hub is optimized for each scenario considering net present value (NPV) and grid integration (GI) level as the objective functions. A significant difference in objective function values is observed when analyzing the four scenarios. Similarly, a significant difference in the energy system design is observed when moving from one scenario to another. The results of the study reveal that a energy system design is strongly influenced by extreme climate scenario considered which will make the energy system to be a sub-optimal when operating at a different climatic condition with a significant performance gap. Therefore, improving the climate flexibility of energy systems is an essential task which is challenging at the early design process. (C) 2019 The Authors. Published by Elsevier Ltd.
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| 2. |
- Wiklund, Johan, et al.
(author)
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Application of in-line ultrasound Doppler-based UVP-PD rheometry method to concentrated model and industrial suspensions
- 2006
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In: Flow Measurement and Instrumentation. - : Elsevier BV. - 0955-5986 .- 1873-6998. ; 19:3-4, s. 171-179
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Conference paper (peer-reviewed)abstract
- The in-line ultrasound Doppler-based UVP-PD rheometry method was evaluated for non-invasive, real-time theological characterization of complex model- and industrial suspensions. The method is based on the combination of ultrasound velocity profile (UVP) and pressure drop (PD) measurements. Experiments were carried out in pressure driven, steady shear flow at different volumetric flow rates in a flow loop, designed to mimic industrial conditions. Results showed that instantaneous velocity profiles and theological properties could be monitored in real-time, in-line. A much wider range of model and industrial suspensions was covered compared to what has so far been reported in literature. Investigated suspensions differed in particle sizes, distributions, shapes and suspension characteristics. The agreement was good between shear viscosities measured in-line and off-line using conventional rheometers for particles smaller than the shear gap in the concentric cylinders. The UVP-PD method is applicable to suspensions for which conventional, off-line rheometers fail due to shear gap size restrictions. The UVP-PD method can be a valuable tool for process monitoring since rapid changes in theology during processing can be monitored in real-time, in-line. (c) 2007 Elsevier Ltd. All rights reserved.
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