Converting an old refrigerator into a desert cooler using plastic bottles filled with water and sand is an interesting DIY project. The basic idea behind this is to create a low-cost and energy-efficient cooling system by utilizing the principles of evaporative cooling. Here's a step-by-step guide to help you build your desert cooler:
Materials you'll need:
- Old refrigerator (without the compressor or any electrical components)
- Plastic bottles (preferably with caps) - Ensure they are clean and free from any harmful substances.
- Sand
- Water
- Tools (e.g., drill, cutter, screws, etc.)
Step 1: Prepare the refrigerator Remove all electrical components from the refrigerator, including the compressor, thermostat, and any other electronics. You want the fridge to function solely as a container for your cooling system.
Step 2: Drill holes in the refrigerator On the top of the refrigerator (which will now be the bottom when placed horizontally), drill holes big enough to fit the necks of the plastic bottles. These holes will hold the bottles in place and allow air to flow inside.
Step 3: Fill bottles with sand and water Fill the plastic bottles about two-thirds full with clean sand. Then, add water to the bottles, leaving some space at the top to avoid spillage when you place them upside down in the holes you drilled earlier. The sand will provide a larger surface area for evaporation and increase the cooling effect.
Step 4: Secure the bottles in the refrigerator Insert the necks of the bottles into the holes you drilled on the top of the refrigerator. Make sure they are stable and won't fall over easily. You can use some sealant or adhesive if needed to hold them in place.
Step 5: Add water to the bottom of the refrigerator Pour a small amount of water into the bottom of the refrigerator. This water will evaporate and cool the air inside.
Step 6: Place the desert cooler in a well-ventilated area Position the refrigerator cooler in a place with good air circulation. When air passes through the bottles filled with water and sand, it will be cooled down through the evaporative cooling process.
Step 7: Test and adjust Fill all the bottles and turn the system on. The air passing through the bottles should be noticeably cooler than the surrounding air. If you need more cooling, you can add more bottles or increase the water and sand content.
Important Note: This desert cooler is most effective in hot, dry climates. The evaporative cooling principle relies on dry air absorbing the moisture, so it may not work efficiently in areas with high humidity.
Remember to maintain the system by refilling water in the bottles regularly and cleaning them as needed. Always prioritize safety when working on any DIY project, especially when using tools and modifying appliances. If you're not confident in handling this project, consult with an expert or consider alternative cooling options.