Traditional chillers are directly replaced with ethylene glycol evaporative cooling cold storage units. As the gap between peak and off-peak electricity prices widens, traditional chillers have huge electricity consumption costs, which creates tremendous pressure on corporate production and office work. Therefore, replacing traditional chillers with ethylene glycol cold storage units requires small investment and occupies a small area. It can easily achieve the energy-saving goal of saving at least 50% in air-conditioning operating costs without increasing power consumption.