Absorption refrigeration relies on a closed-loop system that uses a heat source to separate and recombine a refrigerant (typically ammonia, water, and hydrogen gas) to create a cooling effect. Unlike vapor-compression refrigerators, which require an electrically powered compressor, absorption refrigerators use a generator, absorber, condenser, and evaporator to circulate the refrigerant naturally. When heat is applied, it causes ammonia to evaporate and separate from water in the generator. The ammonia gas then travels to the condenser, where it dissipates heat and turns back into a liquid before moving through the evaporator. In the evaporator, the ammonia interacts with hydrogen gas, lowering the temperature and absorbing heat from the fridge’s interior, creating the cooling effect.

One of the key advantages of absorption refrigeration is its ability to operate silently and efficiently using propane, natural gas, or even waste heat from solar thermal sources. This makes it an excellent choice for off-grid homes, RVs, and remote locations where electricity is unreliable or unavailable. Additionally, because it lacks a compressor and motorized components, it does not generate synthetic electromagnetic fields (EMF), a concern for those looking to minimize their EMF exposure. While absorption refrigeration is not as energy-efficient as modern compressor-based refrigeration, its ability to function independently of the power grid and provide stable cooling without electrical interference makes it a valuable alternative for specific applications.

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Keith Cutter is President of EMF Remedy LLC
https://www.emfremedy.com/
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The EMF Remedy Podcast is a production of EMF Remedy LLC