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- Publisher Website: 10.1016/j.enconman.2019.03.006
- Scopus: eid_2-s2.0-85062878642
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Article: A kW-scale, 24-hour continuously operational, radiative sky cooling system: Experimental demonstration and predictive modeling
Title | A kW-scale, 24-hour continuously operational, radiative sky cooling system: Experimental demonstration and predictive modeling |
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Authors | |
Keywords | Air conditioners Building energy saving Radiative cooling Sky cooling Sub-ambient water cooling |
Issue Date | 2019 |
Citation | Energy Conversion and Management, 2019, v. 186, p. 586-596 How to Cite? |
Abstract | With the advancement in sub-ambient cooling of water during daytime under the sun with scalable-manufactured radiative cooling metamaterials, the challenge for applications lies in design and building of large-scale radiative cooling systems. Here, we present a kW-scale, 24-hour continuously operational, radiative sky cooling system, with both experimental study and detailed modeling. We first quantitatively show how water flow rate directly affects the system cooling power and inversely affects the water temperature drop. A day-and-night stagnant (flow rate = 0 L/(min·m2)) water cooling test of the system shows a consistent sub-ambient water temperature drop of 5–7 °C. A daytime cooling test of the system at a low flow rate of 0.227 L/(min·m2) yields a maximum sub-ambient temperature drop of 4.0 °C with an average net cooling power of around 80 W/m2. Further modelling for a typical metrological year (in Phoenix, Arizona) shows that the system could generate as much as 350 kWh cold (or 26 kWh/m2) with a sub-ambient temperature drop of 4–5 °C at a low flow rate of 0.1 L/(min·m2) during a typical summer month. The cold generated could be used to assist AC systems in regions or seasons with high ambient temperatures. |
Description | Accepted manuscript is available on the publisher website. |
Persistent Identifier | http://hdl.handle.net/10722/310394 |
ISSN | 2023 Impact Factor: 9.9 2023 SCImago Journal Rankings: 2.553 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Aili, Ablimit | - |
dc.contributor.author | Zhao, Dongliang | - |
dc.contributor.author | Lu, Jiatao | - |
dc.contributor.author | Zhai, Yao | - |
dc.contributor.author | Yin, Xiaobo | - |
dc.contributor.author | Tan, Gang | - |
dc.contributor.author | Yang, Ronggui | - |
dc.date.accessioned | 2022-01-31T06:04:46Z | - |
dc.date.available | 2022-01-31T06:04:46Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Energy Conversion and Management, 2019, v. 186, p. 586-596 | - |
dc.identifier.issn | 0196-8904 | - |
dc.identifier.uri | http://hdl.handle.net/10722/310394 | - |
dc.description | Accepted manuscript is available on the publisher website. | - |
dc.description.abstract | With the advancement in sub-ambient cooling of water during daytime under the sun with scalable-manufactured radiative cooling metamaterials, the challenge for applications lies in design and building of large-scale radiative cooling systems. Here, we present a kW-scale, 24-hour continuously operational, radiative sky cooling system, with both experimental study and detailed modeling. We first quantitatively show how water flow rate directly affects the system cooling power and inversely affects the water temperature drop. A day-and-night stagnant (flow rate = 0 L/(min·m2)) water cooling test of the system shows a consistent sub-ambient water temperature drop of 5–7 °C. A daytime cooling test of the system at a low flow rate of 0.227 L/(min·m2) yields a maximum sub-ambient temperature drop of 4.0 °C with an average net cooling power of around 80 W/m2. Further modelling for a typical metrological year (in Phoenix, Arizona) shows that the system could generate as much as 350 kWh cold (or 26 kWh/m2) with a sub-ambient temperature drop of 4–5 °C at a low flow rate of 0.1 L/(min·m2) during a typical summer month. The cold generated could be used to assist AC systems in regions or seasons with high ambient temperatures. | - |
dc.language | eng | - |
dc.relation.ispartof | Energy Conversion and Management | - |
dc.subject | Air conditioners | - |
dc.subject | Building energy saving | - |
dc.subject | Radiative cooling | - |
dc.subject | Sky cooling | - |
dc.subject | Sub-ambient water cooling | - |
dc.title | A kW-scale, 24-hour continuously operational, radiative sky cooling system: Experimental demonstration and predictive modeling | - |
dc.type | Article | - |
dc.description.nature | link_to_OA_fulltext | - |
dc.identifier.doi | 10.1016/j.enconman.2019.03.006 | - |
dc.identifier.scopus | eid_2-s2.0-85062878642 | - |
dc.identifier.volume | 186 | - |
dc.identifier.spage | 586 | - |
dc.identifier.epage | 596 | - |
dc.identifier.isi | WOS:000463979800044 | - |