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最近,日本竹中工务店、新晃工业(株)和大金工业(株)联合开发出一种新型的自然循环冷暖空调系统(Vapor CrystalSystem)。该系统已采用在建设中的大阪商业银行大楼工程(1990年竣工,地下2层,地上37层,塔楼2层,建筑面积85994m~2)。该系统以氟利昂(不破坏臭氧层的氟利昂)为冷媒,利用其相变——蒸发与凝结时的潜热高效率地进行制冷采暖,与传统的以水为冷媒的空调系统相比,运转成本可降低约三分之二。自然循环冷暖空调系统的冷媒配管液体侧与气体侧呈环状连接,利用液体与气体的密度差产生自然循环力,完全不需要传统系统中的输水泵或冷媒压缩机等设备。另外,在传统的以水为冷媒的系统中,水的利用温差为5℃,每1升水的热利用率为5kcal,而利用R-22潜热的该系统每1升为58kcal,其热利用率可提高10倍以上。该系统的室内装置有制冷用、采暖用两
Recently, Japan’s Takenaka Public Works Co., Ltd., Shinko Kogyo Co., Ltd. and Daikin Industries Co., Ltd. have jointly developed a new type of natural vapor cycle air-conditioning system (Vapor Crystal System). This system has been used in the construction of the Osaka Commercial Bank building project (completed in 1990, underground 2 floors, 37 floors above ground, 2 floors, building area 85994 m~2). The system uses Freon (the freon that does not damage the ozone layer) as the refrigerant, and uses its latent heat of phase change-evaporation and condensation to efficiently perform cooling and heating. Compared with the traditional air-conditioning system using water as the refrigerant, the operating cost can be reduced. About two-thirds. Natural circulation chiller-air-conditioning system has a refrigerant connection between the liquid side and the gas side in a ring shape, and uses the density difference between the liquid and gas to generate a natural circulation force, eliminating the need for a water pump or a refrigerant compressor in a conventional system. In addition, in the conventional water-based refrigerant system, the water use temperature difference is 5° C., and the heat utilization rate per 1 litre of water is 5 kcal, and the system using the latent heat of R-22 is 58 kcal per 1 litre. Can be increased by more than 10 times. The indoor unit of the system has two cooling and heating applications