A Mathematical model for the cold storage of agricultural products
| Autor: | Nelson Luis Cappelli, Carlos Renato Meneghetti, Guilherme Bezzon, Claudio Kiyoshi Umezu, Alexandre Tizzei |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Agricultural products-storage
Mathematical model business.industry Soil Science Refrigeration Cold storage Energy consumption Horticulture Variable rotation Electrical energy-consumption Water cooling Environmental science Electric power Process engineering business Agronomy and Crop Science Gas compressor Evaporator Simulation |
| Zdroj: | Revista Ciência Agronômica v.44 n.2 2013 Revista ciência agronômica Universidade Federal do Ceará (UFC) instacron:UFC |
| Popis: | Studies of control strategies for refrigeration systems observe, among other variables, the dynamic behavior of temperature and the consumption of electrical energy. Aiming to contribute to these studies, this work presents the proposal and validation of a mathematical model for the cooling system of a cold-storage unit. The model approximates the dynamics and interdependence of the variables, to first-order systems with time delay and the summation of effects. The input variables available are the frequency of compressor activation and the thermal load imposed on the unit, and as output variables, the air temperature both at the evaporator inlet and at the centre of the chamber, as well as the electrical power consumed by the compressor. The results obtained were satisfactory, with an error of less than 0.11 °C for the air temperature at the evaporator inlet, of less than 0.09 °C for the temperature at the centre of the chamber, and of less than 1% for the electrical energy consumed. |
| Databáze: | OpenAIRE |
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