Engenharia Agrícola | |
Control system for forced-air cooling of horticultural products | |
João C. T. R. Da Silva1  Bárbara J. T. Mederos1  | |
[1] ,Universidade Estadual de Campinas Faculdade de Engenharia Agrícola | |
关键词: instrumentation; controller tuning; IMC method; cooling time; supervisory system; instrumentação; sintonia de controlador; método IMC; tempo de resfriamento; sistema supervisório; | |
DOI : 10.1590/S0100-69162011000400001 | |
来源: SciELO | |
【 摘 要 】
This work is a study of the implementation of a classical controller using a tuning method referred to as IMC (Internal Model Control) and aimed at the reduction of electrical energy consumption by the appropriate relation between energy consumption and the cooling time with forced air. The supervisory system installed was able to manipulate the variable of frequency of the signal power of the exhaust fan engine (forced air module), to accelerate or decelerate the loss of heat from the product to be cooled by airflow variation that passes through the mass of the produce. The results demonstrated a reduction in energy consumption from 64% and an increase of only 8% in the cooling time to the system using PI/IMC (Proportional - Integral with IMC) tuning method compared with the system in its operating nominal condition. This PI/IMC control may be implemented directly in a frequency converter, without the need to purchase a computer or PLC (programmable logic controller) to run the dedicated application, increasing its economical viability.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
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RO202103040067825ZK.pdf | 622KB | download |