hummingbird212

As you suggest, this does not address the efficiencies from the cooling towers seeing Links of London Charms ambient air temperatures that should be achieved during ice building, which is presumed to be primarily at night. However, that is addressed early in the article. "I am glad you agree with the need to explore ways to store energy and reduce our fossil-fuel consumption and dependence. It's not just conservation and stewardship: it's a vital national-defense imperative." "EnergyGod" writes: "My firm makes ice by cooling 100 percent water to 29°F Links of London Bunny Pink Charm pressure (water freezes at a lower temperature under pressure). We then release the sub-cooled water to an atmospheric (sealed) tank, where it forms a slush - the ice floats to the top, and the 32°F water goes to the bottom, where it is recycled. "Because we are operating at a much higher temperature, cool night temperatures yield a compressor loading virtually equal to 'normal' daytime chiller performance, so no additional energy is required. "Links of London Butterfly Charm we have made 320F chilled water, a 280F (32°F to 60°F), rather than a normal 160F (440F to 6O0F), differential flow is pumped, requiring a 40-percent smaller pump and piping with 40-percent lower water flow and horsepower. "Because the air-handling units (AHUs) see colder water, they make colder air (440F vs. 550F), which means they can be smaller and need less airflow. "Because the air is colder, it also is drier, allowing the system to support space conditions of 800F and 35-percent relative humidity (RH) (which has nearly the same enthalpy as 74°F and 50-percent RH). The warmer room allows even lower supply air (440F to 800F, or a 36°F differential, vs. 550FtO 74°F. or a 19°F differential), requiring 47 percent less air. "The warmer room will see a 15°F delta-T to the outside at 95°F ambient vs. the 21°F delta-T with a 740F room, cutting transmission heat gain by nearly 30 percent and requiring less air to meet the cooling Links of London C Charm while reducing the total amount of cooling capacity needed to satisfy the spaces.