I noticed, that my nutrient solution alway stays at about 25°C. I read, that this might be a bit too high for fogponics. I tried to come up with something to adjust it, an maybe even control the temperature (day/night) cycle.
I saw setups/products that were kind of expensive and a bit too big for my system. So I figured to build a simple and inexpensive way to regulate the nutrient-solution. Also I’m curious of what you guys think about my idea.
Rough system setup:
- Thermoelectric Peltier Refrigeration Cooling System Kit Cooler Fan TEC-12706 (14$)
- GPU Water Cooling Block PC Copper High Performance Liquid Cooler (15$)
Semiconductor BTS7960B Motor Driver 43A H-Bridge Drive PWM (12$)
4 DS18B20 Waterproof Digital Temperature Temp Sensor Probe 1M (4$/piece)
- DC 12V 1A Powerful Micro Brushless Magnetic Amphibious Appliance Water Pump (16$)
- 3Pcs Geekcreit™ Doit NodeMcu Lua ESP8266 ESP-12E WIFI Development Board (6$/piece)
- Some silicon tubes
My plan is, to replace the peltiers small fan and radiator with the GPU cooler. Attach it to the pump and pump the nutrient solution through it. Using the temperature probes I want to regulate the PWM that powers the thermoelectric element and thus control the liquids temperature. I know that it’s not the most efficient way, but it’s small and cheap to build. I can even heat up the solution, should it get too cold.
So far i got the GPU-cooler mounted on the peltier element (added some thermally conductive paste). And now I have to wait for the pump and tubing
It might even be suited to regulate the temperature of a small grow-chamber
what do you guys think?