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A new compact and efficient freezing air dryer

And energy saving. Rectangular 4 Conclusion H. . '. . . Figure 3 precooler first plate-fin heat exchanger and tube heat exchanger compared to highlight the advantages, the higher heat transfer area per unit volume, heat transfer efficiency is higher. The experiment, four air purifier has: (1) light weight,[link widoczny dla zalogowanych], small size. 200SCFM type size is about 0.02m; re-l6 women only. (2) low pressure drop and high efficiency. The air purifier test a range of products found that the dew point temperature of up to 4 ℃ (continued on page 57) Vo1.30, No. 8.2002FLUIDMACHINERY57 layer, length × width × height of 39m × 15m × 25.2m office building, the height of 3.6m, floor area of 4095m2. Assume that this was no weekend office (such as telecommunications, telecommunications, banking and other departments), the daily air time of 8:00 to 17:00. Xi'an information with reference year to calculate the reference year, the building-by-4 to September when the cooling load. This calculation results as the training data set for ANN training and prediction of ANN to predict results in Table 1. Table 1 Artificial neural network prediction error standard deviation cvEEP time (W )(%)(%) 7 月份 weight prediction in June month of the cooling load 2l707.76.114.648 weight 29743.48.375 cooling load prediction in June .998 month of weight prediction in July when the cooling load 28881.68.165.8l fh1 Figure 1 using the weights of August the cooling load prediction in June by the end of August after training the weights of the cooling load of 6,7 month to predict the results shown in Figure 1,2. The solid line is the actual calculated values, dashed line is the predicted value. Prediction results were as follows: standard deviation 29743.4W, coefficients of variation CV is 8.37%, expected error percentage is 5.99% EEP; standard deviation 28881.6W,[link widoczny dla zalogowanych], coefficients of variation CV is 8.16%, expected EEP percentage deviation of 5.18%. Predictive value in good agreement with the calculated values, indicating that ANN is a reliable method of building cooling load forecasting. Lan funny 『uJfh1 Figure 2 when using the weights of August the cooling load prediction in July 5 Conclusion accurately predict the ice storage system optimization and control of the foundation and premise. Based on the above literature, the current temperature in the ice storage system commonly used form factor prediction method; and for solar radiation and building cooling load forecasting, artificial neural network is a more effective method. Artificial neural network for the building cooling load forecast with reliable accuracy. But further examination of its practical application to Dai. (Ref. 2l slightly articles. In need, please contact the author) Author: Shi Lei, male,[link widoczny dla zalogowanych], born in 1973, PhD. Address 710055 Xi'an, Shaanxi University of Science and Technology Building # 375. (Continued from page 44) the following, the whole pressure drop of not more than 30kPa, purification, drying efficiency of 70% or more, consume less energy. Traditional refrigerated air dryer systems,[link widoczny dla zalogowanych], the performance greatly improved. (3) corrosion resistance, easy maintenance, long life. Four in air purifiers are made of aluminum, the surface layer of aluminum oxide protective layer, the quality is not easily corroded gas operator, without blocking the channel plate-fin heat exchangers, therefore, the maintenance of purifiers mainly in on the filter mesh: stainless steel mesh lower prices, replacement is easy, easy maintenance, so their whole life long. (4) low manufacturing cost. Four in one Air Purifier Although the use of relatively high market price of aluminum, but the overall consideration,[link widoczny dla zalogowanych], the manufacturing cost than traditional air purification system is low. Small amount of material used in machine, material costs are lower. Smaller, lower shipping costs. Vacuum brazing, without consuming electrode, help to reduce manufacturing costs. (5) the use of environmentally friendly refrigerants HFC134a. References [1] Hu Bingwen, talk about memory Wei. 2 # freezer chemical fiber plant transformation. Portland Technology, 1996,14:5760, [2] from the river, refrigerated air dryer system in packaging application. Large N, 1992, (3) :184-185. [3] Su Zhen. Power apparatus with compressed air dehydration, North China Electric Power Technology, 1997, (7): 32 ~ 39, [4] Ling Xiang, Zhou Guo Yan, TU Shan-dong, four air purifier. In the patent, CN01272903.5, 2002. About the author: Zhou La Yan, female, born in 1977, graduate students, major research equipment for the process of manufacturing techniques and CAE Ya Address: 210009, Nanjing University of Technology Mechanical and Power Engineering

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