Combined short- and long-term heat storage with Sodium Acetate Trihydrate for solar heat supply in buildings

Gerald Englmair; Christoph Moser; Simon Furbo; Hermann Schranzhofer; Jianhua Fan

Combined short- and long-term heat storage with Sodium Acetate Trihydrate for solar heat supply in buildings

Gerald Englmair, Christoph Moser, Simon Furbo, Hermann Schranzhofer, Jianhua Fan

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

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Abstract

Because of its ability to preserve latent heat of fusion at room temperature in supercooled state, the phase change material (PCM) sodium acetate trihydrate (SAT) can be utilized for combined short and long-term heat storage in buildings. This was experimentally proved with a novel solar combisystem demonstrator including a segmented heat storage prototype, consisting of 4 flat units containing 200 kg of SAT composites each. A numerical model of the demonstrator was developed in TRNSYS environment. Ongoing system simulation indicates potential for more efficient domestic hot water and space heating supply. Further, based on experience with flat units, an inexpensive, cylindrical heat storage unit of the same PCM volume as one flat unit was designed and tested. Results showed that 27 kWh of heat can be stored. After cooling to room temperature, 11 kWh (long-term storage potential) were discharged during SAT composite solidification.

Original language	English
Publication date	2018
Publication status	Published - 2018
Event	International Sustainable Energy Conference 2018 - Congres Graz, Graz, Austria Duration: 3 Oct 2018 → 5 Oct 2018

Conference

Conference	International Sustainable Energy Conference 2018
Location	Congres Graz
Country	Austria
City	Graz
Period	03/10/2018 → 05/10/2018

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@conference{08c4a70a47504bb5a2e05a2804c59e41,

title = "Combined short- and long-term heat storage with Sodium Acetate Trihydrate for solar heat supply in buildings",

abstract = "Because of its ability to preserve latent heat of fusion at room temperature in supercooled state, the phase change material (PCM) sodium acetate trihydrate (SAT) can be utilized for combined short and long-term heat storage in buildings. This was experimentally proved with a novel solar combisystem demonstrator including a segmented heat storage prototype, consisting of 4 flat units containing 200 kg of SAT composites each. A numerical model of the demonstrator was developed in TRNSYS environment. Ongoing system simulation indicates potential for more efficient domestic hot water and space heating supply. Further, based on experience with flat units, an inexpensive, cylindrical heat storage unit of the same PCM volume as one flat unit was designed and tested. Results showed that 27 kWh of heat can be stored. After cooling to room temperature, 11 kWh (long-term storage potential) were discharged during SAT composite solidification.",

author = "Gerald Englmair and Christoph Moser and Simon Furbo and Hermann Schranzhofer and Jianhua Fan",

year = "2018",

language = "English",

pages = "617--618",

note = "International Sustainable Energy Conference 2018, ISEC 2018 ; Conference date: 03-10-2018 Through 05-10-2018",

}

Combined short- and long-term heat storage with Sodium Acetate Trihydrate for solar heat supply in buildings. / Englmair, Gerald; Moser, Christoph; Furbo, Simon; Schranzhofer, Hermann; Fan, Jianhua.

2018. 617-618 Abstract from International Sustainable Energy Conference 2018, Graz, Austria.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

TY - ABST

T1 - Combined short- and long-term heat storage with Sodium Acetate Trihydrate for solar heat supply in buildings

AU - Englmair, Gerald

AU - Moser, Christoph

AU - Furbo, Simon

AU - Schranzhofer, Hermann

AU - Fan, Jianhua

PY - 2018

Y1 - 2018

N2 - Because of its ability to preserve latent heat of fusion at room temperature in supercooled state, the phase change material (PCM) sodium acetate trihydrate (SAT) can be utilized for combined short and long-term heat storage in buildings. This was experimentally proved with a novel solar combisystem demonstrator including a segmented heat storage prototype, consisting of 4 flat units containing 200 kg of SAT composites each. A numerical model of the demonstrator was developed in TRNSYS environment. Ongoing system simulation indicates potential for more efficient domestic hot water and space heating supply. Further, based on experience with flat units, an inexpensive, cylindrical heat storage unit of the same PCM volume as one flat unit was designed and tested. Results showed that 27 kWh of heat can be stored. After cooling to room temperature, 11 kWh (long-term storage potential) were discharged during SAT composite solidification.

AB - Because of its ability to preserve latent heat of fusion at room temperature in supercooled state, the phase change material (PCM) sodium acetate trihydrate (SAT) can be utilized for combined short and long-term heat storage in buildings. This was experimentally proved with a novel solar combisystem demonstrator including a segmented heat storage prototype, consisting of 4 flat units containing 200 kg of SAT composites each. A numerical model of the demonstrator was developed in TRNSYS environment. Ongoing system simulation indicates potential for more efficient domestic hot water and space heating supply. Further, based on experience with flat units, an inexpensive, cylindrical heat storage unit of the same PCM volume as one flat unit was designed and tested. Results showed that 27 kWh of heat can be stored. After cooling to room temperature, 11 kWh (long-term storage potential) were discharged during SAT composite solidification.

M3 - Conference abstract for conference

SP - 617

EP - 618

T2 - International Sustainable Energy Conference 2018

Y2 - 3 October 2018 through 5 October 2018

ER -