Approaching nearly zero energy of PV direct air conditioners by integrating building design, load flexibility and PCM

Sihui Li, Jinqing Peng*, Meng Wang, Kai Wang, Houpei Li, Chujie Lu

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The energy matching of PV driven air conditioners is influenced by building load demand and PV generation. Merely increasing energy performance of building or PV capacity separately may improve the energy balance on a large time resolution, the real-time energy mismatching problem is still serious. In this study, a coordinated optimization method of PV capacity, building design, and load flexibility is proposed for improving the real-time energy matching of PVAC system. Then, a methodology integrating data mining method (XG Boost) and parametric simulation was developed to identify the determinant parameters of PV system and building design, exploring feature importance and correlations. The results of XG Boost indicate that the PV capacity, shape factor, and SHGC are the most critical factors. Finally, based on the optimized building design, the PCM layer was applied to improve the real time energy matching. To achieve a goal of 90 % ZEP, the PCM capacity can be decreased by 50.4 % and 62.8 % in Guangzhou and Shanghai in the optimized building. Moreover, the PV capacity can be reduced by 23 % in Guangzhou. The findings of this study provide practical guidance for designing PVAC system coupling with building design and energy storage devices.
Original languageEnglish
Article number119637
JournalRenewable Energy
Volume221
DOIs
Publication statusPublished - 2024

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Funding

This work was supported by Hunan Provincial Natural Science Foundation of China under Grant No. 2023JJ40038 and No. 2022JJ40497, National Natural Science Foundation of China under Grant No. 52108070, National Key R&D Program of China under Grant No. 2022YFB4201003.

Keywords

  • PV direct driven air conditioner (PVAC)
  • Zero energy buildings
  • Load flexibility
  • Building design

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