HS-DEMO

Demonstration of a novel thermo-chemical heat storage system to improve energy-efficiency in CHP power plants and in solar driven industrial applications with high relevance in SMEs

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 Obiettivo del progetto (Objective)

'The FP7 R4SME HeatSaver project (Grant Agreement No.: 222116) successfully developed a zeolite based thermo-chemical heat storage concept at an integrated 1000 litre scale with significant advantages compared to SoA technologies in terms of energy density and flexibility. HeatSaver was assessed by the EC Research Executive Agency(REA) as delivering high quality science and technology development: That the project made good progress, achieving most of its objectives and technical goals with only relatively minor deviations. The REA also noted that “further development of the concept would be effective in close collaboration with potential end-users to enable simplification of system components and their optimization”. HS-DEMO will bring HeatSaver RTD results closer to market, within six months of the completion of this project, the SME partners seek to achieve sales of units. This project will result in an industrially and commercially viable thermal storage system that has wide applications. The demonstration project will involve: 1) Industrialisation of the manufacturing process through a Value Engineering approach. 2) Enable economies of scale in manufacture. 3) Validation of a commercially viable process that can be marketed with a reasonable return on investment by customers; requiring the recovery of heat at a cost of less than €50 to €90/MWh. This cost will be an economic target of HS-DEMO. 4) The need to demonstrate the technology over extended periods in industrial locations. Outline agreement has already been obtained for this from power plant company, CHP plants and solar thermal plants. 5) The demonstrations to be shown to relevant potential customers from across industry and across Europe (over 25 visitors), in a format that is able to show it to be of potential to benefit to their respective businesses. 6) Feedback from demonstrations to be collated in a format that enables iterative system enhancement to improve the commercial viability of the process.'

Introduzione (Teaser)

Novel thermal systems containing zeolite pellets allow storing heat in chemical form for lengthy periods of time without losing any of the stored energy. An EU-funded project unveiled two demonstrators of this thermal storage technology to facilitate market introduction.

Descrizione progetto (Article)

Development of efficient technologies to store waste heat for later use can significantly reduce carbon dioxide (CO2) emissions and mitigate the associated global climate change. EU-funded industry companies and scientists prepared and ran demonstrations of high-density thermochemical heat storage for temperatures above 120 degrees Celsius with the project HS-DEMO (Demonstration of a novel thermo-chemical heat storage system to improve energy-efficiency in CHP power plants and in solar driven industrial applications with high relevance in SMEs).

The preceding HEATSAVER project provided proof of principle. HS-DEMO focused on demonstrating and optimising the HEATSAVER system in various industrial test scenarios. These included small-scale generation of heat and power as well as solar thermal plants.

Thermochemical heat storage uses an adsorbent-adsorptive reaction pair that dissociates when heated and releases heat when allowed to react again. As long as the reaction is prevented, the heat is held. This system has several benefits compared to sensible heat storage (based on the kinetic energy of molecules) exploiting water or phase-change materials. Such systems are much more compact and lightweight due to higher energy density. In addition, release of heat is controlled and temperatures for storage and release can be adapted according to the application. HS-DEMO employed water as the adsorptive for an economical and environmentally friendly solution.

The first demonstrator was used for space heating. Afterwards, it was installed at another test site serving as a compact and reliable part of the energy supply of a demonstration house. The main heat sources were oil heaters and solar thermal collectors, respectively.

Waste heat from a saw dust burner provided heat to the third demonstrator, which provided heating for hot water and space heating as well.

These innovative thermal storage systems can theoretically store 10 times the amount of heat that water can, requiring smaller storage containers and thus also facilitating their transport. In addition to cost savings, efficient heat storage contributes to reducing the use of fossil fuels and the associated CO2 emissions.