Investigation of spatial variability of air temperature, humidity and velocity in cold stores by using management zone analysis

Bu araştırmanın temel amacı, bir soğuk hava deposunda Alansal Analiz Yöntemini kullanarak ortam sıcaklığı, bağıl nem ve hava hızının konumsal değişkenliğini belirlemektir. Deneysel soğuk hava deposunun ortam sıcaklığı, bağıl nemi ve hava hızı, sıcaklık ve nemi aynı anda ölçen ve kaydeden 36 adet sensör ve hava hızı ölçüm cihazı kullanılarak ölçülmüştür. Sensörlerin yerleşimi soğuk depolama koşullarını izlemek için üç seviyede (alt, orta ve üst) ızgara (grid) şeklinde yapılmıştır. Tam dolu, yarı dolu ve boş soğuk hava deposu için ölçülen veriler bulanık kümeleme yöntemi ile gruplama yapan Management Zone Analyst (MZA) yazılımı ile analiz edilmiştir. Ayrıca, Surfer haritalama programı ile ölçülen parametrelerin haritalarını oluşturmak için kullanılmıştır. Sonuçlar, soğuk hava deposunun verimliliğini en üst düzeye çıkarmak ve depolama süresini uzatmak için önemli temel parametrelerden olan ortam sıcaklığı, bağıl nem ve hava hızı dağılımı açısından önemli mekansal (konuma bağlı) farklılıkların olduğunu göstermiştir.

Soğuk hava depolarında hava sıcaklığı, nemi ve hızındaki konumsal değişkenliğin alansal analiz yöntemi ile irdelenmesi

The main objective of this research was to determine spatial variability of ambient temperature, relative humidity and air velocity in a cold storage using management zone analysis methods. Ambient temperature, relative humidity and air velocity of an experimental cold store were measured using 36 temperature-relative humidity sensors and air velocity measurement probe. Sensor installation was performed on grid scale at three levels (base, middle and top) such as to monitor the storage conditions in the cold store. The measured data were analysed by MZA software which performed fuzzy clustering to delineate the full cold storage, half full cold storage and empty cold storage. In addition, Surfer mapping software was utilized to create the maps of the measured parameters. The results indicated that there is significant spatial variation of the basic storage parameters such as ambient temperature, relative humidity and air velocity in the cold storage, which denotes the significance of management zones delineation in these facilities so as to maximize the storage.

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