Modern storage technologies allow reductions in energy consumption of up to 50% with increased storage temperatures from 1?C to 4?C

Modern storage technologies, such as 1-methylcyclopropene (1-MCP) or dynamic controlled atmosphere (DCA), have the potential to save energy due to their intensive ripening inhibiting effects. On the one hand, these technologies allow fruit storage at increased temperatures, within a certain range, without any appreciable negative influence on fruit quality. On the other hand the strong inhibition of fruit respiration can reduce the respiratory heat input of the fruit. To evaluate the energy saving potential of 1-MCP (SmartFreshTM) and DCA, experiments over six years with different apple cultivars were undertaken in commercial (200 t capacity) and research facility (11 t capacity) CA-rooms to compare standard CA (1.0 kPa O2; 2.5 kPa CO2) at 1?C and DCA (HarvestWatchTM) (~0.4kPa O2; 1-2kPa CO2) or CA (1.0 kPa O2; 2.5 kPa CO2) in combination with 1-MCP at increased temperatures (3, 4 or 5?C). Energy consumption for the refrigeration compressors, ventilation fans, defrosting and CO2 scrubbing was calculated from the machinery run-time records or by measurements with installed electric meters. Fruit quality parameters (firmness, TA, TSS, colour), ethylene production and respiration were measured at different time points. Weight loss was determined at the end of storage. Experiments were accompanied by sensory tests. Results show reductions in energy consumption of up to 50% with increased storage temperatures from 1?C to 4?C without any appreciable negative influence on fruit quality and ripening, providing that apple harvesting, postharvest timings and applications are all carried out in accordance with good horticultural practice. The highest energy consumption and highest potential saving were observed for the refrigeration compressors and ventilation fans. Fruit quality analyses and consumer tests showed that 1-MCP and DCA-storage have the potential to compensate for the negative influence of increased storage temperatures and thus provide the possibility to reduce energy consumption when compared to conventional CA/ULO storage. ? Complete list of authors, original title and sourcesPotential energy savings using modern storage technologies in combination with increased storage temperaturesD. Kittemann1,2, D.A. Neuwald1, R. McCormick1, J. Streif11Competence Center for Fruit Growing ? Lake Constance, Ravensburg, Germany2University of Hohenheim, Physiology of Specialty Crops, Germany V Postharvest Unlimited, ISHS International Conference, 10-13 June 2014, Cyprus, Source of the picture, Isolcell ? Key wordsPoscosecha?? ?postcosecha?? ?postharvest?? ?na-oes?? ??? ??? ???????? ????? ??? ?post-r?colte?? ????? ?? ??????????? ??? ?na-oogst?? ?post-raccolta?? ?Obr?bka po?? ?p?s-colheita?? ????????????????? ?hasat sonras??? ??? ?Ernte?? ????????????????? ????? ????????????? ?postcollita?? ?poskliz?ov頠 ????? ??? ??? ??? ?nakon branja?? ?pozberov頠 ??? ?obdelovanje zemlje po?? ?post-colleita?? ?????? ??????? ?pascapanen?? ??il?onn postharvest?? ??????? ?p?c ra?as?? ?derliaus apdirbimas po?? ?lepas tuai?? ??? ?? ???????? ?post-recoltare?? ??????? ??????? ???????????????????? ?????????????? ?????????????????? ?sau thu ho?ch?? ?????????????????? ?zangemva kwenkathi yokuvunaManzana?? ??? ?apple?? ??? ???????? ????? ??? ?pomme?? ??????? ?????? ?appel?? ?mela ?? ?jab?ko?? ?ma?㠠 ????????? ?elma?? ??????? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ?Pera?? ??? ?pear?? ?peer?? ???????? ???? ??? ?poire?? ??? ???????? ??? ????????? ??? ??? ?gruszka?? ?pereira?? ???????? ?armut?? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ???? ? ?