Logical and experimental verification of computer model for heat distribution in the objects under cover

Jan Vogelgesang , Kazimierz Rutkowski , Krzysztof Kempkiewicz

Abstract

The technical system that gains heat from deep in the ground by heat pump is complicated and any attempt to implement innovative solutions requires a comprehensive analysis. The developed computer program had to predict the effects of design changes in the system: the lower source - heat pump - buffer tank - heaters - the greenhouse and its environment. The goal of this paper is to present the method to verify and determine the directions of model improvement (Vogelgesang et al., 2010). The verification process consists of two stages. First, a computer model with logical and some other tests was experienced to check the behavior of desired quality features. In this model, the fiction experiences were implemented changing about 20 input variables, and their results to logic and expert analysis were subjected. No unexpected program behaviors were occurred, also in limit situations. In this analysis the expected and known quality relations were confirmed as "increase", "decrease". Next, an experiment in the real object was carried, to calibrate the model and to determine the numerical values of some parameters, in particular related to environmental variables, including coefficient of heat transfer. After obtaining adjusted values, the model was experimentally verified conducting a series of experiments, similarly to the quality verification, but this time expecting confirmation of the simulated values with these obtained in the real object. Due to technical limitations, experiments included only variables related with the buffer tank operation. In this scope, the satisfactory quality of applied model was stated. Obtained consistency of results allows choose an optimal size of the buffer tank in the technical system with heat pump having a model as a base including expected time of its use, the object type and the projected weather scenario. There was found that further development requires modeling of thermal processes in the greenhouse, in particular the internal heat distribution in the context of diverse and changing in time: geometry, thermal capacity, spatial objects location (Rutkowski, 2009)
Author Jan Vogelgesang (FoPaPE / IoAEaI)
Jan Vogelgesang,,
- Institute of Agricultural Engineering and Informatics
, Kazimierz Rutkowski (FoPaPE / IoAEaI)
Kazimierz Rutkowski,,
- Institute of Agricultural Engineering and Informatics
, Krzysztof Kempkiewicz (FoPaPE / IoAEaI)
Krzysztof Kempkiewicz,,
- Institute of Agricultural Engineering and Informatics
Pages646-650
Publication size in sheets0.5
Book Trends in Agricultural Engineering 2013 : 5th Internationale Conference TAE 2013 : conference proceedings : 3-6 September, 2013, Prague, Czech Republic, 2013, Czech University of Life Sciences, Faculty of Engineering, ISBN 978-80-213-2388-9, 726 p.
Keywords in Englishcomputer model, heat distribution
URL http://proceedings.tae-conference.cz/docs/proceedings_TAE_2013.pdf
Internal identifierWIPiE/2013/63
Languageen angielski
Score (nominal)15
ScoreMinisterial score = 10.0, 27-07-2017, BookChapterMatConfByIndicator
Ministerial score (2013-2016) = 15.0, 27-07-2017, BookChapterMatConfByIndicator
Citation count*
Additional fields
FinansowanieThis work is financed by research project No. N 313 445137 National Science Centre Poland.
Oświadczenie o afiliacjiJan Vogelgesang, Kazimierz Rutkowski, Krzysztof Kempkiewicz
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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