Thermal energy storage comprises a number of technologies that store thermal energy in energy storage reservoirs for later use.
Thermal energy is often accumulated from active solar collector or more often combined heat and power plants, and transferred to insulated repositories for use later in various applications, such as space heating, domestic or process water heating. Solar thermal
technology is more efficient than solar PV and can help a building offset peak energy costs by harnessing daytime solar energy and applying it directly to heating water for the building’s systems.
Thermal Ice Storage
Thermal Ice Storage is another method of thermal storage that helps take advantage of off-peak energy generation and storage for later use during peak hours.
Thermal Ice systems essentially use ice as a battery. The units make ice at night, and use that ice during the day to deliver cooling directly to the building’s existing air conditioning system.
Electricity is more plentiful and often less energy intensive to produce at night. By offsetting the operation of the energy-intensive commercial AC condensing unit at times when temperatures are high and efficiency of the AC unit is at its worst, thermal ice storage systems help mitigate utility demand and reduce costs.