外文翻譯--溫濕度獨立控制的空調(diào)設(shè)備在辦公大樓的工作情況-資料下載頁
2025-01-08 08:43本頁面
【正文】 and distributed into radiant floor for cooling, and the handled dry fresh air and indoor exhaust air are supplied and expelled in the bottom and in the middle of the space respectively, which forms a “ dry air layer” to protect the cold floor surface from condensation。 in the higher space that far from occupied zone, solar radiation that enters through glass curtain wall is absorbed by the ornamental decorations in the higher space, and the heat is then carried away by natural ventilation through the shutters directly. The temperature control subsystem and humidity control subsystem can be operated separately according to ambient condition and indoor requirement. The two subsystems operate together at hot and humid outdoor climate。 Only the humidity control subsystem operates at cold but humid ambient condition。 Outdoor air is directly introduced into occupied spaces after filtering when outdoor air is dry enough, such as 11 g/kg. According to our knowledge, cooling air can be realized more easily than dehumidification by condensation, since the latter one requires lower temperature of cooling source than the former. However, the COP of the tested temperature control subsystem is lower than or equal to that of the humidity control subsystem in present THIC system. Thus, this section will focus on how to improve the performance of the temperature control subsystem. According to the performance of each ponent in the temperature control subsystem shown in Table 4, three main improvements of the temperature control subsystem are remended: (1) modifying the frequency of the chilled water pump。 (2) improving the cooling tower performance by tightening the strap。 and (3) improving the performance of FCUs under dry working condition. The first two methods can be easily realized in the building, while the third one depends on the improvement of new FCU products. The operating performance of the THIC system in an office building in Shenzhen is presented in this paper. Liquid desiccant fresh air units are used to supply dry fresh air to control indoor humidity, and chilled water with the temperature of ?C is pumped and distributed into radiant panels and dry fan coil units to control indoor temperature. The followings are the conclusions based on the tested results: (1) The THIC system can provide a fortable indoor environment that indoor temperatures, humidity ratios as well as CO2 concentrations are all within the fortable ranges. (2) The COP of the entire THIC system can reach , with the COP of the temperature control subsystem and humidity control subsystem of – and respectively. The energy consumption of the THIC system in the tested office building is (m2 yr) ( airconditioning area), that is, the energy efficiency is much higher than that of the conventional airconditioning system available in literature. (3) Possible improvements of the temperature control subsystem are provided, including modification on the chilled water pump, cooling tower and FCUs. Thus, the expected system COP can be further increased to , which can save 9% pared to present airconditioning system.
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