Cascaded Latent Heat Storage (CLHS) for hightemperature CSP applications material development and characterization to lab-scale setup

Subcategory (under Clean Energy): Cross Cutting
Technology Readiness Level (TRL): TRL 4 - Early prototype
Technology Outline (Process Description)

The present research is attributed to the cascaded latent heat storage (CLHS) concept to ensure the maximization of thermal energy storage in the form of latent heat while optimizing the best utilization of the phase change material (PCM). The major objective of cascading is to select and arrange suitable PCMs with different melting points andlatent heat from the existing pool of commonlyavailable PCMs so that fast chargingcan be attained while ensuring maximum thermal energy storage in the form of latent heat. Therefore, this study will experimentallyandnumerically analyzethe optimization of the maximum utilization of latent heat from the PCM. A novel multi-pass shell and tube-typeheat exchanger is designed for latent heat storage with dimensions400*337.2*337.2mm3 with 100 pipes so the total pipe length is 40m excluding the bends. Our key achievements are the novel heat exchanger unit, high temp material development, and working lab-scale setup for the different applications with cascaded latent heat energy storage.

Salient Features/Advantages

  • PCM-CEG composite is prepared with organic PCM like paraffin wax and coconut oil , inorganic salt, eutectic/non- eutectic salt like nitrate salts, andsolar salts composition with a melting point above 300°C
  • Thermal characterization of PCM-CEG composite
  • 2-D, 3-D single storage unit cycle dynamics model development considering solidification and melting and, 1-D heat transport model for heat transfer fluid (HTF) is done
  • Performance analysis of optimized lab-scalesetup is done by finding optimal cascaded combinations

Key Outcomes

  • Novel heat exchanger unit, high temp material development, working lab-scale setup for the different applications with cascaded latent heat energy storage, a cascaded system for best utilization of latent heat of PCM
  • Cascaded Latent Heat Storage system with an operating temperature range of 100-400°C
  • Cascaded Latent Heat Storage system with an operating temperature range of 100-400°C is prepared
  • Fast Charging and discharging are attained

IP Protection details

  • Patent filed (Title, national/International): In Process
  • Patents Granted: Nil
  • Copyrights obtained /progress on commercialisation /Pl. specify connect with industry: Nil

Contact details (for more information)

  • Nodal Person name: Dr. Prodyut R. Chakraborty
  • Email ID: pchakraborty@iitj.ac.in
  • Organisation name (Relevant link/web page): IIT Jodhpur
Supporting Photographs/Images

Organizations involved in the development (logo/name)

Indian Institute of Technology, Jodhpur

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