Indoor CO2 capture-driven passive cooling for photovoltaics with ventilation energy reduction utilizing amine-functionalized adsorbents

Seonggon Kim, Minjae Kim, Kwangjin Jang, Suk Goo Yoon, Wonjoon Choi, Hoseong Lee, Joon Hyung Shim, Yong Tae Kang

Research output: Contribution to journalArticlepeer-review

Abstract

In carbon capture, utilization, and storage processes, CO2 capture consumes 80 % of total energy consumption, reaching 3–8 MJ/kg which poses a formidable challenge. Conversely, buildings are responsible for approximately 40 % of final energy consumption and contribute over 30 % of CO2 emissions, highlighting the urgent need to reduce the building energy. In this work, a sustainable indoor CO2 capture-driven passive cooling system is developed for building-integrated photovoltaics with ventilation energy reduction by coating amine-impregnated mesoporous silica (PEI/MCM-41) to the rear of PV cells using supersonic cold spraying method. During nighttime, it effectively mitigates indoor CO2 concentration increase due to human respiration by capturing 1.64 mmol/g of CO2, enabling a reduction of 180 MJ/kg-thermal in winter and 30.4 MJ/kg-electric in summer within the building. In daylight hours, PV cells generate electricity, and the supplied radiant solar heat is consumed for CO2 desorption (latent cooling), lowering the average temperature of the PV cells and improving the power efficiency. PEI/MCM-41 achieves a remarkable cooling energy density of 242 J/g and average cooling power of 357 W/m2. It has been demonstrated that the present system can simultaneously reduce the building energy consumption and CO2 emission.

Original languageEnglish
Article number118351
JournalEnergy Conversion and Management
Volume307
DOIs
Publication statusPublished - 2024 May 1

Bibliographical note

Publisher Copyright:
© 2024 Elsevier Ltd

Keywords

  • CO capture driven passive cooling
  • Indoor air capture
  • Photovoltaic cell cooling
  • Supersonic cold spray coating
  • Ventilation energy management

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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