The scientists studied a cooling system using a special chiller that can be powered by solar energy. They wanted to find the best way to make the system work well and save energy. They looked at different factors like how efficient the chiller was and how comfortable it kept the building. They compared this system to a regular air conditioner. They used a computer program to simulate how the system would work in real life. They also thought about using a new way to control the system by changing how fast the cooling tower fan spins.