Optimal Control on Paddy Drying and Storage Complexes. (Part 1)
1972 Volume 33 Issue 4 Pages 375-384
Details
1972 Volume 33 Issue 4 Pages 375-384
This paper is concerned with an optimalization in the design and operation of the plant for drying paddy.
Since the plant is used for a short term and set under the unprofitable state, it is necessary to design the plant rationally and operate it efficiently. And hourly and dayly fluctuations of the amount of the paddy received are great. This makes the operation more difficult. Authors studied a case of Ohmi-Hachiman Aglicultural Cooperative Association, and tried to shimulate the accumulated stock at the receipt department to grasp the nature of the subject and get an optimum standard for design.
The main conditions and results were as follows:
A) Conditions
1) The quantities received by the hour were varied by binder (type 1) or combine reaping (type 4), and then we made the comparision of the stock between type 1 and type 4.
2) The quantities received by the day were varied by weather and another factors, and then we used the actural receiving data.
B) Results
1) In the case of 1, 200t. total, type 1, the quantities of the stock will be disposed without affecting the quantities received on the next day, if paddy is disposed at the rate of 3.0t/h.
In order to reduce the stock accumulated and the length of the overtime work, it is necessary to increase processing speed, while the operation rate will be reduced. In case of type 4, the receipt is concentrated in the evening and the stock is increased more substantially than type 1. Thus it is necessary to increase the processing speed by 0.5-1.0t/h beyond that of type 1.
2) In the case of 2000t. total, it ts necessary to set the processing speed at more than 5t/h. Since overtime work decreases exponentially with processing speed, the effect of increased process speed is more pronounced.
3) The accumulated stock was able to be computed according to processing speed if the rough receiving pattern by the hour and also by the day, the total amount received, and total number of days required had been presumed. Thus the most appropriate processing speed would be found by regulating the condition of the stock.
