Industrial storage of root vegetables: Energy and quality aspects of existing cold-storages
2019
Indergård, Erlend | Thomsen, Mette Goul | Heltoft, Pia | Asalf, Belachew | Nordskog, Berit | Widell, Kristina Norne | Nordtvedt, Tom Ståle | Tajet, Torgeir | Larsen, Hanne
After harvesting, the Norwegian root vegetables are normally stored at refrigerated temperatures for 5 to 7 months. During this period, up to 30% of the products are lost. The goal is to reduce the diseases, the product loss and energy consumption, in addition to increase shelf-life and storage period. Twenty-eight commercial root vegetable cold-stores were instrumented to measure air temperature, relative humidity and product temperature. The study was done over two years. The cold-stores were located in four different regions of Norway. The three focus-products carrot, swede and celeriac were harvested from one field in each region in open wire nets. The nets were placed in the various cold-stores in the respective regions and put in the wooden bins together with the producer's own products. The quality and yield of the products were determined and correlated to the storage condition. The various storage condition negatively affects the respiration and quality of the root vegetables, storage-life, and influence on the cooling capacity of the refrigeration systems.
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