New energy-saving industry: use ice to cool skyscrapers
it is hot in summer. Urban skyscrapers and apartments have turned on air conditioners, making the urban power supply reach the limit, which is an inevitable problem in modern cities. New York, the most populous city in the United States, consumes more electricity in summer than Chile. However, big New York companies have found a new energy-saving strategy - ice cooling
three advantages: energy saving, environmental protection and durability
peak power consumption plummeted
Credit Suisse Group adopted the ice refrigeration system, which reduced the peak power consumption of the Metropolitan Life Insurance Building by 900 kW, and the total annual power consumption decreased by 2.15 million kwh, saving enough power for 200 households. In the West Chester office building of Morgan Stanley Investment Bank, due to the use of ice refrigeration system, the peak power consumption decreased by 740 kW, and the total annual power consumption decreased by 900000 kwh
equivalent to planting trees for thousands of square kilometers
the ice refrigeration system reduces the power supply pressure of New York electricity and reduces urban pollution. Credit Suisse Group adopts this system, which is equivalent to reducing the flow of 223 vehicles on the streets, or planting 1.9 million acres (nearly 7700 square kilometers) of forests. Most of the 25 industries have an annual output value of 10 billion yuan to absorb the carbon dioxide generated by electricity every year. In a city where most carbon dioxide emissions come from buildings, this method of reducing pollutants is worth learning from. New York state officials say there are at least 3000 ice refrigeration systems in the world
high operating efficiency and not prone to failure
Credit Suisse Group has an office area of 1.9 million square feet (about 17000 square meters) in the metropolitan life insurance building. In the basement of Credit Suisse Group, there are three main refrigeration rooms, equipped with refrigerators and 64 small pools, each with 800 gallons of water. Credit Suisse's office area is also equipped with a traditional air-conditioning system, but engineers can give priority to more energy-efficient systems
the construction period of the ice refrigeration system is about four months. The company's engineers said that the operation efficiency of the system is very high. The filler is replaced by 100% degradable green packaging material. Conrad of Trane energy service company said: "the mechanical system of the air conditioner is prone to failure, and will stop running if it is not operated properly, while the large ice cubes on the four floors underground will melt. The electronic tensile testing machine is composed of one (single arm) or two (portal) vertical bearing columns, and nothing else will happen."
three disadvantages: large size, our experimental machine has too long experience of communicating with customers, high research and development costs, and expensive maintenance
however, the ice refrigeration system is not suitable for all office spaces, because installing a large pool requires space. The investment is also quite large: Credit Suisse Group's cost of maintaining its refrigeration system is as high as more than US $3 million; The maintenance costs of Morgan Stanley Investment Bank are also similar, which means that this technology is most suitable for large companies with strong economic strength
Conrad said, "ice refrigeration system is suitable for some companies pursuing environmental protection. If there are more benefits, such as the return on investment. The reason why refrigeration system can only be used by large companies is that their refrigeration cost is very high."
ice storage refrigeration system
some office buildings rely on ice to achieve the purpose of indoor cooling, which can also help alleviate environmental pressure. These ice cubes are made in the evening when the power is more sufficient, and the cost is low