Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Optimisation of product quality and minimisation of its variation in climate controlled operations
    Verdijck, G.J.C. ; Straten, G. van; Preisig, H.A. - \ 2005
    Computers and Electronics in Agriculture 48 (2005)2. - ISSN 0168-1699 - p. 103 - 122.
    model
    An optimisation procedure is presented for direct control of product quality of agro-material and minimisation of its quality variation. The procedure builds on a previously presented model structure, which is briefly reviewed, together forming a methodological framework for direct product quality control in climate controlled operations. The economic-based optimisation procedure is part of a hierarchical control structure and utilizes the model to achieve the required control. The result is a trade-off between operational cost and product quality. The characteristic variation in natural products is treated by a lumped approach, which uses discretised quality classes to describe not only product quality but also a measure of its variation. Although direct measurement of product properties is often difficult, the approach is validated using both simulated and measured data. The procedure has been implemented and tested in a full-scale industrial operation of storing large quantities of potatoes, using recorded real data to illustrate the benefits of the procedure
    Direct product quality control for energy efficient climate controlled transport of agro-material
    Verdijck, G.J.C. ; Preisig, H.A. ; Straten, G. van - \ 2005
    Journal of Process Control 15 (2005)2. - ISSN 0959-1524 - p. 235 - 246.
    respiration rate - model
    A (model-based) Product Quality Controller is presented for climate controlled operations involving agro-material, such as storage and transport. This controller belongs to the class of Model Predictive Controllers and fits in a previously developed hierarchical control structure. The new Product Quality Controller rejects disturbances and tracks the product quality by means of the product responses respiration and fermentation. To achieve an energy efficient operation the presented controller is closely linked with the (existing) local controllers. Local optimisation on the level of these local controllers allows (controlled) high-frequent climate fluctuations. This results in significant energy savings. The Product Quality Controller and the energy efficient local controllers are implemented in small-scale and full-scale industrial case studies on controlled atmosphere-container transport of apples. This yields direct control of product quality and a significant reduction in energy consumption.
    Quality control in the storage of potatoes for industrial processing
    Verdijck, G.J.C. ; Tijskens, L.M.M. - \ 2003
    Acta Horticulturae 599 (2003). - ISSN 0567-7572 - p. 479 - 487.
    A novel control structure for a potato storage facility is presented that is directly geared at the optimal preservation of product quality. The quality of the stored potatoes is defined as frying colour that depends on sugar concentration. The optimal storage conditions are estimated using models of both product behaviour and storage process to optimise quality and costs. The control structure is implemented in an industrial storage facility. Results show an improved product quality and lower energy cost. An important extension to the nominal product model is the consideration of product quality with its variation
    Model predictions and control of conditions in a CA-reefer container
    Sman, R.G.M. van der; Verdijck, G.J.C. - \ 2003
    Acta Horticulturae 600 (2003). - ISSN 0567-7572 - p. 163 - 171.
    containertransport - energiegebruik - koeltransport - appels - gecontroleerde omgeving - modellen - container transport - energy consumption - refrigerated transport - apples - controlled atmospheres - models
    In this paper a concept for energy saving for refrigerated container transport is presented. The concept is based on model-predictive control of the set points of the cooling unit. These models predict energy consumption of the cooling unit, climatic conditions inside the cargo space, and the change in product quality. The objective of the control is to minimize energy consumption while retaining a certain level of product quality. After presenting the concept of the model-predictive control the predictive power of the models used are shown. These models show that we are able to predict energy consumption, temperature, humidity and gas conditions quite accurately. Furthermore, an indication is given for the quality change model to be employed. The impact of the novel control is shown by simulation of a transport of apples
    Model-based product quality control applied to climate controlled processing of agro-material
    Verdijck, G.J.C. - \ 2003
    Eindhoven University of Technology. Promotor(en): H.A. Preisig, co-promotor(en): Gerrit van Straten. - Eindhoven : Technische Universiteit Eindhoven - ISBN 9789038620008 - 153
    voedselkwaliteit - opslagkwaliteit - gasbewaring - voedselopslag - vervoerskwaliteit - kostenbeheersing - modellen - aardappelen - appels - procesbewaking - food quality - storage quality - controlled atmosphere storage - food storage - transporting quality - cost control - models - potatoes - apples - process control
    A modelling and control structure for product quality control in climate-controlled processing of agro-material
    Verdijck, G.J.C. ; Straten, G. van - \ 2002
    Control Engineering Practice 10 (2002)5. - ISSN 0967-0661 - p. 533 - 548.
    In this paper a modelling and control structure for product quality control is presented for a class of operations that processes agro-material. This class can be characterised as climate-controlled operations, such as storage, transport and drying. The basic model consists of three parts. These are the quality and behaviour of the product, and its direct and indirect environment. This decomposition is reflected in the proposed control structure. The significance of the explicit inclusion of product behaviour is that the control is much more geared to the demands of the product. The applicability and potential advantages of the proposed structure are illustrated in different industrial cases, such as the storage of potatoes and the transport of apples in reefer-containers
    A model structure for product quality in processing agro-material for process control purposes
    Verdijck, G.J.C. ; Sillekens, J.J.M. ; Preisig, H.A. - \ 2002
    Journal of Food Engineering 51 (2002)2. - ISSN 0260-8774 - p. 151 - 161.
    Koelcontainers : de stand van zaken
    Lukasse, L. ; Boogaard, R. van den; Sanders, M. ; Verdijck, G. ; Sman, R. van der; Boogaard, G. van den; Peppelenbos, H. - \ 2001
    Koude & klimaat : officieel orgaan van de Nederlandse Vereniging voor Koeltechniek 94 (2001)6. - ISSN 0923-6554 - p. 22 - 27.
    Beheersing van kwaliteitsverloop van AGF-producten tijdens geklimatiseerde opslag en transport
    Lukasse, L. ; Verdijck, G. - \ 2001
    Koude & klimaat : officieel orgaan van de Nederlandse Vereniging voor Koeltechniek 94 (2001)4. - ISSN 0923-6554 - p. 32 - 38.
    Control of Product Quality Variation in climate controlled operations with applications to storage and transport of agro-materials
    Verdijck, G.J.C. ; Straten, G. van; Preisig, H.A. - \ 2001
    In: Proceedings of the Workshop on Control Applications in Post-Harvest and Processing Technology , Tokyo, 2001 - p. 83 - 88.
    Tracing en tracking en kwaliteitsbeheersing van bederfelijke producten
    Verdenius, F. ; Rijgersberg, H. ; Verdijck, G. ; Polderdijk, A. ; Tijskens, P. ; Lukasse, L. - \ 2000
    In: VIAS 2000, 28 september, at Ede (Netherlands)
    Control of quality evolution of agricultural products in climatised storage and transport using product quality evolution models
    Verdijck, G. ; Lukasse, L. - \ 2000
    Journal A. Benelux Quarterly Journal on Automatic Control 41 (2000)3. - ISSN 0771-1107 - p. 37 - 44.
    MODEM : Modelgebaseerde Regeling voor Optimale Aardappelbewaring : voortgangsrapportage juli - december 1998 en eindrapportage MODEM-project
    Verdijck, G. ; Hak, P. ; Hoving, M. ; Kolk, G. van der; Maldegem, J. van; Kleef, W. van; Ooijen, M. van; Sewathal, H. ; Sinke, K. ; Ceton, C. - \ 1999
    Wageningen : Agrotechnological Research Institute (ATO-DLO) (Rapport / Agrotechnological Research Institute B389) - 54
    MODEM : Modelgebaseerde Regeling voor Optimale Aardappelbewaring : voortgangsrapportage juli-december 1998 en Eindrapportage MODEM-project
    Verdijck, G. ; Hak, P. ; Hoving, M. ; Kolk, G. van der; Maldegem, J. van; Hoof, M. van; Kleef, W. van; Ooijen, M. van; Sewathal, H. ; Sinke, K. ; Ceton, C. - \ 1999
    Wageningen : Agrotechnological Research Institute (ATO-DLO) (Rapport / Agrotechnological Research Institute B389) - 36
    Modelling of a storage process for product quality control purposes
    Verdijck, G.J.C. ; Hertog, M.L.A.T.M. ; Weiss, M. ; Preisig, H.A. - \ 1999
    Computers and Chemical Engineering (1999)Supplement. - ISSN 0098-1354 - p. 911 - 914.
    Model based product quality control for a potato storage facility
    Verdijck, G.J.C. ; Weiss, M. ; Preisig, H.A. - \ 1999
    In: 1999 American Control Conference, 2-4 June, at San Diego (USA)
    Optimal quality control in potato storage
    Verdijck, G.J.C. - \ 1999
    In: Agri-food quality II: quality management of fruit and vegetables - from / Hagg, M., Ahvenainen, R., Evers, A.M., Cambridge, UK : Royal Society of Chemistry
    MODEM : Modelgebaseerde Regeling voor Optimale Aardappelbewaring : voortgangsrapportage januari - juni 1998
    Hertog, M. ; Hak, P. ; Hoving, M. ; Kolk, G. van der; Maldegem, J. van; Verdijck, G. ; Bons, R. ; Kleef, W. van; Ooijen, M. van; Sewathal, H. ; Sinke, K. ; Ceton, C. - \ 1998
    Wageningen : Agrotechnological Research Institute (ATO-DLO) (Rapport / Agrotechnological Research Institute B347) - 54
    Bewaren van aardappels
    Hak, P.S. ; Schild, J.H.W. van der; Verdijck, G.J.C. - \ 1998
    Wageningen : Instituut voor Agrotechnologisch Onderzoek ATO-DLO - ISBN 9789090012063 - 170
    Optimale sturing Aardappelbewaring (in dutch)
    Hertog, M.L.A.T.M. ; Verdijck, G. ; Maldegem, J.P. van - \ 1998
    Aardappelwereld (1998)8. - ISSN 0169-653X - p. 29 - 30.
    aardappelen - opslag - gasbewaring - potatoes - storage - controlled atmosphere storage
    ATO-DLO ontwikkelt in samenwerking met Tolsma Techniek b.v. een nieuwe regeling voor de aardappelbewaring. Deze regeling zal door Tolsma Techniek op de markt gebracht gaan worden onder de handelsnaam P-WATCH
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