Firstly, let me congratulate you on making this
Incredibly Awesome set of rules.
Anyway, it is probably intended but even while reading, I have already thought of multiple applications and devices (often before I even finished a section). This is great stuff.
I have broken down the devices into individual modules, so they can be easily mixed and matched.
Generators
Curie Effect (aka. nuclear reactor)
Planck-Becquerel Generator (aka. Solar Panel)
Carnot Engine
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Appliances
Lightning Cannon