- If I want to use natural convection to drive the process, I'll need to have taller columns to generate the needed flow.
- I need greater contact area with the desiccant to facilitate air drying.
Since these changes would take some time and I'm up against a deadline on my lease, I'm going to switch to a different setup to try an ammonia/water adsorption setup.
Below is the schematic for this arrangement. An ammonia/water solution would be in the section of pipe in the solar collector. When the solar collector heats up, it will boil off the ammonia, which will then condense in the cooler evap section, which is cooled by pumping heat medium to the heat storage. Then, when the solar collector cools off, the water will attract the ammonia, evaporating it from the evap section. In this stage, heat will be added to the ammonia by the heat medium, which is circulated to cool storage. By this mechanism, I expect to obtain, alternatively, both heat and cooling from my solar collector. Below is a schematic. Keep tuned for results from this trial.