Radiation-Based Space Cooler

Forced air heating/cooling is an inefficient method of cooling a building. Its the result of a lack of innovation since the original invention of the concept in 1919. I've designed a cooler that passes cold water through a radiator to cool the surrounding space. It does not use a fan. It uses an icebox filled with water and reusable ice packs. Water is circulated using a centrifugal pump. The pump is controlled by an ESP32 T-Display which takes input from a sensor. The test consisted of a box constructed from foam sheets and contained a DS18B20 temperature sensor to track temperature. The goal temperature and the current temperature of the box was displayed on the ESP32's display. The built-in buttons on the ESP32 were used to set the goal temperature. If the goal temperature was not achieved, the pump would receive power from an N-Channel MOSFET. The box achieved a temperature difference of 9°F from ambient temperature outside the box. I created this project as everyone has access to a refrigerator and it is easy to make ice cubes.