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Buildings 2018, 8(7), 86; https://doi.org/10.3390/buildings8070086

Building Energy Management Using Increased Thermal Capacitance and Thermal Storage Management

Department Mechanical Engineering, Mississippi State University, Starkville, MS 39762, USA
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Received: 1 June 2018 / Revised: 21 June 2018 / Accepted: 25 June 2018 / Published: 27 June 2018
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Abstract

This study simulates an increased thermal capacitance (ITC) and thermal storage management (TSM) system to reduce the energy consumed by air conditioning and heating systems. The ITC/TSM is coupled with phase change materials (PCM), which enable tank volume reduction. The transient energy modeling software, the Transient System Simulation Tool (TRNSYS), is used to simulate the buildings’ thermal response and energy consumption, as well as the ITC/TSM system and controls. Four temperature-controlled operating regimes are used for the tank: building shell circulation, heat exchanger circulation, solar panel circulation, and storage. This study also explores possible energy-saving benefits from tank volume reduction such as losses associated with the environment temperature due to tank location. Three different tank locations are considered in this paper: outdoor, buried, and indoor. The smallest tank size (five gallons) is used for indoor placement, while the large tank (50 gallons) is used either for outdoor placement or buried at a depth of 1 m. Results for Atlanta, Georgia show an average 48% required energy decrease for cold months (October–April) and a 3% decrease for warm months (May–September) for the ITC/TSM system with PCM when compared with the reference case. A system with PCM reduces the tank size by 90% while maintaining similar energy savings. View Full-Text
Keywords: thermal capacitance; phase change material; reduced energy consumption thermal capacitance; phase change material; reduced energy consumption
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Wilson, M.; Luck, R.; Mago, P.J.; Cho, H. Building Energy Management Using Increased Thermal Capacitance and Thermal Storage Management. Buildings 2018, 8, 86.

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