Certified Facility Manager (CFM) Practice Exam

What principle does thermal storage utilize to conserve energy?

1. Using thermal blankets for insulation

2. Storing ice and cold water for cooling

3. Recycling heated air

4. Utilizing geothermal energy

The correct answer is: Storing ice and cold water for cooling

The principle behind thermal storage is the ability to store thermal energy for later use, specifically by using materials like ice or cold water to absorb and retain cold temperatures. This process allows facilities to produce cooling during off-peak hours, when energy costs are lower, and then utilize that stored cold energy later during peak demand periods. By storing ice or cold water, facilities can effectively shift energy consumption to times when it is most economical, thereby conserving energy and reducing operational costs. This method is particularly effective in settings where cooling demands fluctuate significantly throughout the day. In contrast, other options like using thermal blankets for insulation, recycling heated air, or utilizing geothermal energy refer to different approaches in energy management or conservation, but do not encapsulate the specific mechanism of thermal energy storage.