Experimental study on heat storage system using phase-change material in a diesel engine
- Authors
- Park, Sangki; Woo, Seungchul; Shon, Jungwook; Lee, Kihyung
- Issue Date
- Jan-2017
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Phase-change material (PCM); Coolant waste storage device; Thermal accumulator
- Citation
- ENERGY, v.119, pp.1108 - 1118
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENERGY
- Volume
- 119
- Start Page
- 1108
- End Page
- 1118
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/10535
- DOI
- 10.1016/j.energy.2016.11.063
- ISSN
- 0360-5442
- Abstract
- Engines usually use only about 25% of the total fuel energy for power, and the rest is discarded to the cooling water and exhaust gas. Therefore, a technique for utilizing external waste heat is required to improve fuel efficiency in terms of total energy consumption. In this study, a heat storage system was built using a phase-change material in order to recover about 30% of the thermal energy wasted through engine cooling. The components of the heat storage system were divided into phase-change material, a heat exchanger, and a heat-insulating container. For each component, a phase-change material that is suitable for use in vehicles was selected based on the safety, thermal properties, and durability. As a result, a stearic acid of a fatty acid series with natural extracts was determined to be appropriate. In order to measure the reduction in engine fuel consumption, a thermal storage system designed for the actual engine was applied to realize a quick warm-up by releasing stored heat energy directly on the coolant during a cold start. This technique added about 95 calories of heat storage device warm-up time compared to the non-added state, which was reduced by about 18.1% to about 27.1%. (C) 2016 Elsevier Ltd. All rights reserved.
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