PCM storage system with integrated active heat pipe

R. Yogev, A. Kribus*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations


The use of the latent heat of phase change materials (PCM) is considered a promising approach to store heat at a nearly constant temperature for direct steam generation (DSG), but the poor thermal conductivity of commonly available storage materials imposes severe limitations on storage performance. A new method is proposed to overcome the limitations of the low thermal conductivity. The approach is to physically decouple the evaporator pipes from the PCM, thus allowing independent sizing of each component. The thermal link between the two components is done via evaporation and condensation of a heat transfer fluid (HTF), according to the principle of a heat pipe. Pumping the liquid HTF provides active control of the heat pipe operation. The new concept is modeled and compared to the conventional design of conduction based PCM annulus around the steam pipe. An example case shows a significant advantage in performance of the active heat pipe configuration due to its reduced thermal resistance.

Original languageEnglish
Pages (from-to)1061-1070
Number of pages10
JournalEnergy Procedia
StatePublished - 2014
EventInternational Conference on Solar Power and Chemical Energy Systems, SolarPACES 2013 - Las Vegas, NV, United States
Duration: 17 Sep 201320 Sep 2013


FundersFunder number
Ministry of National Education and Research, France
Ministry of Foreign Affairs
Ministry of Science and Technology, Israel


    • Concentrating solar power (CSP)
    • Heat pipe
    • Latent heat thermal storage (LHTS)
    • Phase change materials (PCM)


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