A Preliminary Analysis on the Night Cooling Potential of Photovoltaic/thermal (PV/T) Panels for European Cities
Open accessAbstract
A model of three PV/T collectors of 3.9 m2 area was developed in TRNSYS for analysing its cooling potential in Athens, Greece; Madrid, Spain; Milan, Italy; Bucharest, Romania; Frankfurt, Germany; Copenhagen, Denmark and Oslo, Norway between 1st of May and 30th of September. An in-depth analysis over the model was conducted for Copenhagen, Denmark where supply temperature, collector slope, and flow rate were varied. For the other six European cities subject to different climates, the only parameter varied was the supply temperature while the optimum slope for electricity production was selected for the PV/Ts. A coverage ratio was determined, representing the amount of cooling demand of an office room covered by the cooling energy produced by the PV/Ts. With respect to Europe, a higher cooling potential was found for northern climates. For a representative supply temperature of 21oC, a specific cooling power ranging from 35 to 70 W/m2 was determined. Finally, the same trend was visible for the coverage ratio, ranging from 55% to 120%. The results show that this cooling technology has a potential to be further used, when coupled to appropriate room cooling systems, such as water-based high temperature cooling systems.
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Currently, sky radiative cooling technology is mostly associated with nighttime, when the sky can reach temperatures below 0 °C and there is no incident solar radiation.
“Thus, currently, this technology is mostly associated with nighttime, when the sky can reach temperatures below 0 °C [222,227] and there is no incident solar radiation.”
From Resilient cooling strategies – A critical review and qualitative assessment (2021) · cites this paper as [222]
Night sky radiative cooling is ready for market implementation because it can be employed through existing technologies such as solar collectors and PV/Ts.
“Moreover, it is ready for market implementation since it can be employed through existing technologies such as solar collectors and PV/Ts [222,223,225].”
From Resilient cooling strategies – A critical review and qualitative assessment (2021) · cites this paper as [222]
When using sky radiative cooling actively, parameters such as the flow rate of the heat storage medium can be controlled, allowing higher exploitation (higher recovery speed), especially during periods when the potential is high.
“Furthermore, when using the technology actively, parameters such as the flow rate of the heat storage medium can be controlled [220,221,223,229], allowing higher exploitation (higher recovery speed), especially during periods when the potential is high, thus using the available resources in a timely manner.”
From Resilient cooling strategies – A critical review and qualitative assessment (2021) · cites this paper as [221]
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References 13 · Cited by 5
- Authors
- Bogatu, D.-I., Kazanci, O. B., & Olesen, B. W.
- Affiliations
- Technical University of Denmark (DK)
- Corresponding author
- Bogatu, Dragos-Ioan
- Venue
- E3S Web of Conferences
- Publisher
- EDP Sciences
- Published
- 2019
- Volume
- 111
- Pages
- 01055
- ISSN
- 2267-1242 (ISSN-L)
- OpenAlex
- W2953660992
- Cited by
- 5
- References
- 13
- Citations by year
- 2025: 1 · 2024: 1 · 2022: 2 · 2021: 1
- FWCI
- 1.58
- Type
- conference paper
- Language
- en
- Open access
- diamond
- doi.org
- Locations
- E3S Web of Conferences (publishedVersion, cc-by)
- Springer Link (Chiba Institute of Technology) (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Technical University of Denmark, DTU Orbit (Technical University of Denmark, DTU) (submittedVersion, other-oa)
- Funders
- Danmarks Tekniske Universitet
- Energiteknologisk udviklings- og demonstrationsprogram
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Solar Thermal and Photovoltaic Systems
- Physical Sciences › Engineering › Building and Construction › Building Energy and Comfort Optimization
- Physical Sciences › Engineering › Mechanical Engineering › Solar Energy Systems and Technologies
- Keywords
- photovoltaic-thermal collectors, night cooling, solar cooling, cooling potential, European cities, climate dependence, supply temperature, flow rate, coverage rate, TRNSYS simulation
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