Demand Control Strategies of a PCM Enhanced Ventilation System for Residential Buildings

Yue Hu*, Per Heiselberg, Tine Steen Larsen

*Corresponding author

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

A ventilated window system enhanced by phase change material (PCM) has been developed, and its energy-saving potential examined in previous works. In this paper, the ventilation control strategies are further developed, to improve the energy-saving potential of the PCM energy storage. The influence of ventilation airflow rate on the energy-saving potential of the PCM storage is firstly studied based on an EnergyPlus model of a sustainable low energy house located in New York. It shows that in summer, the optimized ventilation airflow rate is 300 m3/h. The energy-saving of utilizing a ventilated window with PCM energy storage is 10.1% compared to using a stand-alone ventilated window, and 12.0% compared to using a standard window. In winter, the optimized ventilation airflow rate is 102 m3/h. The energy-saving of utilizing a ventilated window with PCM energy storage is 26.6% compared to using a stand-alone ventilated window, and 32.8% compared to using a standard window. Based on the optimized ventilation airflow rate, a demand control ventilation strategy, which personalizes the air supply and heat pump setting based on the demand of each room, is proposed and its energy-saving potential examined. The results show that the energy savings of using demand control compared to a constant ventilation airflow rate in the house is 14.7% in summer and 30.4% in winter.
Original languageEnglish
Article number4336
JournalApplied Sciences
Volume10
Issue number12
Number of pages20
DOIs
Publication statusPublished - 2020

Keywords

  • Phase change material
  • Energy storage
  • Ventilation control strategy
  • Building energy conservation

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