Sure Chill have developed a new design for a commercial retail product refrigerator which can operate several days without mains power. They had an urgent need to test their prototype product in an environmental chamber which could simulate the temperature and humidity conditions of an African climate. The key aims for Sure Chill were to confirm the refrigerator’s capability to cool down stored bottles of water, it’s efficiency, and monitor how cool the bottles will stay when mains power has been removed.
To support Sure Chill in a better understanding of the prototype’s performance, quantitative thermal images were taken of the refrigerator at timed intervals, over a range of operating conditions, such as during the initial pulldown when warm water bottles were loaded into the fridge, and during the cooling cycle to identify if any heat leakage from the environment into the refrigerator interior was visible. This visual information was supplemented with direct temperature measurements of the bottles during the entire process.
Following the collaboration with CPE some minor design changes were identified which have led to further improvements to the refrigerator efficiency.