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| Title: | Improving discharge characteristics of indirect integral collector storage systems with multielement storage |
| Author (s): | Boies, A. M. Homan, Kelly |
| Department/Lab Affiliations: | Mechanical & Aerospace Engineering Space Systems Engineering |
| Keywords: | thermal energy storage |
| Subject Terms: | Heat exchangers. |
| Issue Date: | 2008-05 |
| Publisher: | American Society of Mechanical Engineers ASME |
| Citation: | Boies, A. M. and K. O. Homan. "Improving discharge characteristics of indirect integral collector storage systems with multi-element storage", J Solar Energy Engineering 130(2) (May 2008): 021003. |
| Abstract: | The desired performance of unpressurized integral collector storage systems hinges on the appropriate selection of storage volume and the immersed heat exchanger. This paper presents analytical results expressing the relation between storage volume, number of heat exchanger transfer units, and temperature-limited performance. For a system composed of a single storage element, the limiting behavior of a perfectly stratified storage element is shown to be superior to a fully mixed storage element, consistent with a more general analysis of thermal storage. Since, however, only the fully mixed limit is readily obtainable in a physical system, the present paper also examines a division of the storage volume into separate compartments. This multielement storage system shows significantly improved discharge characteristics as a result of improved elemental area utilization and temperature variation between elements, comparable in many cases to a single perfectly stratified storage element. In addition, the multielement system shows increased robustness with respect to variations in heat exchanger effectiveness and initial storage temperature. |
| Type: | Article - Journal text |
| In Title: | Journal of Solar Energy Engineering |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Pre-print: author cannot archive; Post-print: author cannot archive; FULL COPYRIGHT INFORMATION: |
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| title | Improving discharge characteristics of indirect integral collector storage systems with multielement storage |
| contributor.author | Boies, A. M. |
| contributor.author | Homan, Kelly |
| contributor.deptlab | Mechanical & Aerospace Engineering |
| contributor.deptlab | Space Systems Engineering |
| contributor.sponsor | National Renewable Energy Lab |
| subject | thermal energy storage |
| subject.LCSH | Heat exchangers. |
| date.issued | 2008-05 |
| publisher | American Society of Mechanical Engineers ASME |
| identifier.citation | Boies, A. M. and K. O. Homan. "Improving discharge characteristics of indirect integral collector storage systems with multi-element storage", J Solar Energy Engineering 130(2) (May 2008): 021003. |
| identifier.pub.URI | |
| description.abstract | The desired performance of unpressurized integral collector storage systems hinges on the appropriate selection of storage volume and the immersed heat exchanger. This paper presents analytical results expressing the relation between storage volume, number of heat exchanger transfer units, and temperature-limited performance. For a system composed of a single storage element, the limiting behavior of a perfectly stratified storage element is shown to be superior to a fully mixed storage element, consistent with a more general analysis of thermal storage. Since, however, only the fully mixed limit is readily obtainable in a physical system, the present paper also examines a division of the storage volume into separate compartments. This multielement storage system shows significantly improved discharge characteristics as a result of improved elemental area utilization and temperature variation between elements, comparable in many cases to a single perfectly stratified storage element. In addition, the multielement system shows increased robustness with respect to variations in heat exchanger effectiveness and initial storage temperature. |
| type | Article - Journal |
| type.DCMIType | text |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights | Pre-print: author cannot archive; Post-print: author cannot archive; |
| rights.URI | |
| rights.URI | |
| relation.isPartOf | Journal of Solar Energy Engineering |
| date.available | 2008-09-24T15:24:45Z |
| identifier.persist.URI |