Technology to Reversibly Store and Release Heat

Request Number REQ0342496
Due Date April 28, 2017
Author Jos Cenens
Request for Proposal Details
RFP Title
Technology to Reversibly Store and Release Heat
RFP Description

NineSigma, representing a global company, invites proposals for a device or technology that can rapidly release ‘stored’ heat upon activation and maintain its warmth for a period of 20 minutes. The heat will be transferred to a fluid circuit. The device needs to be rechargeable so that it can repeatedly release its ‘stored’ heat.


NineSigma’s client is developing a novel product that requires heating a fluid circuit  in a fast and efficient way without direct use of electricity or other fuels being consumed.


The scope of the project will include finding the proper material or reaction to provide and maintain the suitable amount of heat. Recharging of the device may use other forms of energy (electricity, waste heat…)


A variety of research or industrial sectors may have a solution to this need. NineSigma’s client has successfully tried out the principle on a zeolite-water design but there is room for considerable improvement, e.g. efficiency, size, cost.


Anticipated Project Phases or Project Plan

Phase 1 – Proof of concept testing

  • Thorough testing of performance characteristics and technical capabilities of proposed device in a client-specified setting including assessment of manufacturing aspects and costs
  • Production of a prototype demonstrating the desired functionality. Qualification for high volume supply to market


Phase 2 – Commercial development


Criteria for Moving from Phase 1 to Phase 2

Successful release of heat, several charging-release cycles without loss of efficiency, positive evaluation of production and economical criteria


Key Success Criteria

The successful technology will:

  • Be capable of storing heat
  • with a storage density of approx. 0,04 kWh/liter
  • target device size of 5-6 liter maximum
  • able to maintain its capacity for several weeks in an environment of -40°C up to 80°C
  • Release of heat
    • quick release of minimal 0,2 kWh within the first 5 minutes of activation
  • Efficiently transfer released heat into a fluid circuit
    • ~5 liter fluid volume
    • rapidly increase the fluid temperature with about 50°C
    • fluid Cp about 2 kJ/kg.K
  • Be rechargeable
    • in case of electric charging the voltage need can vary in the range from 12 to 40V
    • target temperature during charging is ~80°C, the maximum temperature is limited to 300°C
  • Be robust
    • able to operate daily (possibly several charging – release cycles per day) for up to 15 years
  • Be minimal or low maintenance
  • Be safe
    • no release of gaseous species, odors
    • not rely on toxic materials or highly reactive species during its use


Possible Approaches

Possible approaches might include, but are not limited to:


  • Zeolite based heater using water adsorption-desorption cycles
  • Chemically-based heat storage materials
  • Solid-state energy-storage/heat-release materials
  • Use of phase-change materials
  • Supersaturated salt solutions


Approaches not of interest

The following approaches are not of interest:


  • Use of batteries (unless for charging the device)
  • Chemistries that will use or generate toxic species
  • Chemistries that result in significant amounts of gas release
  • Use of combusting charcoals or fuels


Preferred Collaboration types
Items to be submitted

Your response should address the following:

  • Provide convincing non-confidential information supporting the rationale or developed technology to be investigated
    • heat exchanger principle
    • data to support claims if available
    • ability to meet stated characteristics and performance specifications
  • Technical maturity of the approach (concept, prototype, ready to commercialize, commercialized)
  • Estimated budget, timeline, and deliverables for a Phase 1 effort
  • Availability of prototype devices for evaluation by client
  • Status and flexibility regarding intellectual property
  • Team description and related experience


Appropriate responses to this Request

Responses from companies (small to large), researchers,  consultants, venture capitalists, entrepreneurs, or inventors are welcome.  For example:


You represent a company that has developed a zeolite based heater device that is suitable for this request

You represent a university research department that has a bench-scale demonstration of chemically-based storage materials that can store large amounts of heat and release this by a simple trigger


Area of Interest
Request Priority
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