Phase change materials in building integrated space heating and domestic hot water applications: A review

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Thermal energy storage (TES) using phase change materials (PCM) has been widely investigated for various
applications from very low to very high temperatures due to its flexible operating temperature range, high energy
storage density, and long-life cycle at a reasonable cost. The use of PCM in building components and hot water
production can reduce the building energy demand, indoor temperature fluctuation, and better demand-side
management by utilising available renewable energy and off-peak electricity. This paper presents a state-ofthe-
art review of the application of PCM domestic thermal heating. The classifications of TES systems, advantages
of PCM over other TES systems, and the methods to overcome shortcomings of PCM are discussed in brief.
Then the various novel techniques employed in underfloor heating, wall heating, PCM integration in domestic
hot water tanks, and developing latent heat thermal energy storage units are extensively reviewed and the major
findings of the research works reviewed are tabulated. Based on the extensive review conducted, the important
factors to be considered for selecting a suitable PCM for these applications are summarised, and the commercially
available PCM for the above applications are listed with their major thermo-physical properties and supplier
details in the appendix.
Original languageEnglish
JournalJournal of Energy Storage
Early online date8 Jul 2022
Publication statusE-pub ahead of print - 8 Jul 2022


  • Latent heat thermal energy storage
  • Phase change materials
  • Domestic heating
  • Underfloor heating
  • Wall heating
  • Hot water production


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