D2.1 Definition of stakeholder requirements, market demands and application challenges

Deliverable D2.1 identifies the potential market size and geographical location where MiniStor could have more opportunities for success in terms of market introduction based on maximized efficiency, output and constraints such as existing fuels used for heating. It was found that MiniStor is better placed in countries without heat networks (such as district heating). Available levels of solar radiation came as a second consideration for placement. However, system physical characteristics and regulations
concerning ammonia pose further limits to system location. Nevertheless, the number of potential dwellings where this can happen is still counted in several millions.

Competing technologies were analysed. It was found that amalgamation of electrical and thermal storage is not met by current energy storage options. However, direct competitors for MiniStor are domestic hot water (DHW) storage tanks due to lower levels of design complexity and specialization for maintenance. However, primary fuel sources to heat DHW tanks are major contributors to greenhouse gas emissions due to low efficiency and output compared to thermochemical materials.

An initial group of external stakeholders was identified through consortium contacts, and were sent a short introduction to the system and a questionnaire to identify their current expectations regarding a thermal storage system. Results of the questionnaire reveal considerable interest in a standalone thermal storage system with higher capacity than water. The final part of the deliverable provides an overview of obstacles and barriers through a SWOT (Strenghts, Weaknesses, Opportunities, Threats) analysis, which reveals advantages and weaknesses of the MiniStor system in respect to competitor solutions.