Andrew Bissell, reflecting on climate change, noted, "If that happens, then the living room, the ground floor of this home that we live in, will be underwater twice a day. Then you start thinking about that being in hundreds of millions of other homes around the world. That's not acceptable." This realization prompted him to take action rather than retiring after selling his startup.
In founding Sunamp, Bissell and his wife worked with a lab at the University of Edinburgh, developing a method to store solar power as heat. Known as a thermal battery, it provides an innovative solution for household heating or hot water, addressing climate change concerns.
At the core of Sunamp's thermal battery are sodium acetate trihydrate (SAT), water, and crystal habit modifiers. The SAT, utilized in hand warmers, can store heat when dissolved and release it upon recrystallization, enabling efficient heat storage for households that can mitigate the effects of climate change.
To enhance the performance of SAT, Sunamp incorporates acrylic as a crystal habit modifier. This innovation is described as both "weird and exciting," enabling SAT to return to the correct configuration for heat storage more consistently, thus improving the thermal battery's longevity.
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