squirrel235

Think of a Hummer vs. a Prius. If the odometer of each vehicle starts at zero, and both Links of London Charms travel 100 miles, you could say both cars went 100 miles. But the mileage does not indicate how efficiently the cars traveled. The same is true of the utility meter. A utility meter tells how many kilowatthours were used, but not how many source British thermal units were used to make and transport the electricity. "I would like to clarify this statement, 'When in ice-building mode, the design-efficiency penalty for each chiller is Links of London Black And Gold Friendship Bracelet 13 percent (2,300 tons derated by 13 percent equals 2,000 tons).' This is a capacity reduction. I think the efficiency number is in the correct range for efficiency reduction for water-cooled equipment. For air-cooled, in many locations, the energy-efficiency ratio (EER) is the same for ice making as peak day cooling because of ambient relief. "In this example, you can see why the distinction between capacity reduction and efficiency reduction is important. A water-cooled centrifugal (chiller) might be 1,000 tons nominal at 0.6 kw per ton (600 kw). Ice-making capacity at night for this chiller is in the range of 782 tons at 0.68 kw per ton (532 kw). It draws less overall kilowatt demand at night, even though it has reduced efficiency because its capacity is derated for Links of London Black And Orange Friendship Bracelet operating temperatures. To further optimize the cooling system, the chiller can be rightsized, the delta-T enlarged to reduce flow, and medium-temperature air distributed, saving fan horsepower. Additionally. in a partial storage system, the chiller can be upstream of the ice storage, operating at warmer discharge temperatures, thus, improving its EER over a conventional cooling system's. In other words, the design of the system is critical to efficient operation. One cannot look, in my mind, at only the chiller and storage operation. "A presentation by Florida Power & Light Co. during the Links of London Black Friendship Bracelet Society of Heating. Refrigerating and Air-Conditioning Engineers' 2008 Annual Meeting stated: Typically, cooling load is shifted from a 10,000-Btu-per-kilowatt-hour-heat-rate power generator to a combinedcycle generating plant that uses only 7.000 Btuh per kilowatt-hour.