ENGINEERING STUDIES ON STORAGE OF SOME AGRICULTURAL PRODUCTS | ||||
| Menoufia Journal of Agricultural Engineering | ||||
| Article 5, Volume 1, Issue 1, November and December 2017, Page 9-10 PDF (339.7 K) | ||||
| Document Type: original papers | ||||
| DOI: 10.21608/maje.2017.156055 | ||||
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| Authors | ||||
| A. H. A. Eissa1; A. H. Gomea1; M.A. Abd El Maksoud1; E. A. El Saeidy2 | ||||
| 1Prof. of Agricultural Engineering, Fac. of Agric., Menoufia Univ. | ||||
| 2Associate prof. of Agricultural Engineering, Fac. of Agric., Menoufia Univ. | ||||
| Abstract | ||||
| Uniform storage conditions in cold stores are difficult to attain in practice. All storage facilities have one thing in common, the need for proper humidity control. High product and air temperatures and moistures are often observed in certain positions of a cold room leading to deterioration of food quality and safety. To reduce food losses, it is necessary to understand heat and mass transfers. The aim of this study was to improve the optimum cooling condition (air velocity and relative humidity) at 10C of cooling room to maintain quality properties of Anna apple freshly by using a simplified model to calculate heat and mass transfer and respiration rate in addition to measure some quality properties such as firmness, color, total soluble solid and total sugar. Temperature and velocity of air and apples measurements were carried out inside cold room filled with four apple pallets. Because of the room small dimensions (2 * 2 * 2 m), the cold supply air headed directly to the rear part of the room. Therefore, the rear pallets were submitted to lower air temperatures compared to the front ones. This leads to more rapid product cooling rate and lower product final temperature at the rear. The result showed that, Good agreement between the predicted and experimental results was found for both final average Anna apple temperature, weight loss and respiration rate of Anna Apple inside cold room. The maximum firmness was 40.84 N and 27.58 after 10 days and 40 day cooling storage for 95% of relative humidity at medium of pallet A and 680 rpm evaporator fans speed and it was significantly higher than in any of the other treatments. The maximum values for L* was 73.20 and 72.00 at medium of pallet A and 95% of relative humidity after 10 days from cold storage for 680 rpm and 520 rpm of evaporator fans speed, respectively while at the end of cold storage (40 day) was 67.17 and 64.21. | ||||
| Keywords | ||||
| Storage facilities; cold stores; attain practice; humidity control | ||||
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