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1. Convective movement of water starts when it is heated in the loop;
2. Then, it expands and becomes less dense, and thus more buoyant than the coller water in the loop;
3. Thus, convection moves heated water upwards in the system as it is concurrently replaced by coller water dropping downwards due to gravity;
4. In this way, the water in the storage tank becomes hoter and hoter;
5. The water flows easily because a good thermosyphon should have very little hydraulic resistance |
pressured solar water heater