New Perspective on Performances and Limits of Solar Fresh Air Cooling in Different Climatic Conditions

Ancuta C. Abrudan, Octavian G. Pop, Alexandru Serban and Mugur C. Balan
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Ancuta C. Abrudan: Department of Building Services, Technical University of Cluj-Napoca, Bd. 21 Decembrie 1989 128-130, 400604 Cluj-Napoca, Romania
Octavian G. Pop: Department of Mechanical Engineering, Technical University of Cluj-Napoca, Bd. Muncii 103-105, 400461 Cluj-Napoca, Romania
Alexandru Serban: Department of Thermal Engineering, University Politehnica of Bucharest, Splaiul Independentei, 313, 060042 Bucharest, Romania
Mugur C. Balan: Department of Mechanical Engineering, Technical University of Cluj-Napoca, Bd. Muncii 103-105, 400461 Cluj-Napoca, Romania

Energies, 2019, vol. 12, issue 11, 1-22

Abstract: The study carried out by simulation, concerns the thermal behavior of an office building’s solar fresh air cooling system, based on a LiBr-H 2 O absorption chiller in different climatic conditions. The coefficient of performance (COP) and the solar fraction were considered performance parameters and were analyzed with respect to the operating limits—the risk of crystallization and maintaining at least a minimum degassing zone. A new correlation between the required solar hot temperature and the cooling water temperature was established and then embedded in another new correlation between the COP and the cooling water temperature that was used in simulations during the whole cooling season corresponding to each location. It was found that—the solar hot water should be maintained in the range of (80–100) °C depending on the cooling water temperature, the COP of the solar LiBr-H 2 O absorption chiller with or without cold storage tank could reach (76.5–82.4)% depending on the location, and the solar fraction could reach (29.5–62.0)% without cold storage tank and could exceed 100% with cold storage tank, and the excess cooling power being available to cover other types of cooling loads—through the building envelope, from lighting, and from occupants, etc.

Keywords: solar cooling; absorption chiller; LiBr-H 2 O; operating conditions; climatic conditions (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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