Influence of temperature and storing time on flower honey rheologic and thermophysical properties
This contribution deals with rheologic and thermal properties of honey. Automatically controlled processes at manufacturing, at handling and holding require exact knowledge about physical quantities of materials. Some rheologic and thermophysical properties of different kinds of honey are mentioned...
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| Format: | Article |
| Language: | English |
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National Society of Processing and Energy in Agriculture, Novi Sad
2012-01-01
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| Series: | Journal on Processing and Energy in Agriculture |
| Subjects: | |
| Online Access: | https://scindeks-clanci.ceon.rs/data/pdf/1821-4487/2012/1821-44871202052H.pdf |
| _version_ | 1811186814695768064 |
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| author | Hlaváč Peter Božiková Monika |
| author_facet | Hlaváč Peter Božiková Monika |
| author_sort | Hlaváč Peter |
| collection | DOAJ |
| description | This contribution deals with rheologic and thermal properties of honey. Automatically controlled processes at manufacturing, at handling and holding require exact knowledge about physical quantities of materials. Some rheologic and thermophysical properties of different kinds of honey are mentioned in literature. In generally physical properties of honey are influenced by various factors as: type of flowers, way of processing and most of all the area of origin, etc. Research of honey physical properties in Slovak Republic is in the beginning and particular properties are not known. Our research was oriented on measuring of rheologic properties and thermophysical properties of honey. Measuring of dynamic viscosity was performed by digital rotational viscometer Anton Paar (DV- 3P). Principle of measuring is based on dependency of sample resistance against the probe rotation. Thermophysical parameter measurements were done by instrument Isomet 2104. Isomet uses dynamic method of measuring - Hot Wire (HW) method. Sample of honey was stored at laboratory temperature and was measured in different days during storage. Measurements were performed in temperature interval (20 - 43)°C. Dependencies of rheologic parameters as: dynamic viscosity, kinematic viscosity and fluidity on temperature and on storing time and dependencies of thermophysical parameters as: thermal conductivity and specific heat on temperature and storage are described. Temperature dependencies of dynamic and kinematic viscosity could be characterized by decreasing exponential function and temperature dependencies of fluidity by increasing exponential function. Relations between thermophysical parameters and temperature during the heating process had linear increasing shape. Values of dynamic and kinematic viscosity and thermophysical parameters were a bit higher after storing that can be caused by loosening of the water during storage. Values of fluidity were a bit smaller after storing, which is caused by loosening of the water respectively by crystallization during the storage. . |
| first_indexed | 2024-04-11T13:52:46Z |
| format | Article |
| id | doaj.art-5f7f2366f66747e8a2628fdc0db7e6a0 |
| institution | Directory Open Access Journal |
| issn | 1821-4487 2956-0195 |
| language | English |
| last_indexed | 2024-04-11T13:52:46Z |
| publishDate | 2012-01-01 |
| publisher | National Society of Processing and Energy in Agriculture, Novi Sad |
| record_format | Article |
| series | Journal on Processing and Energy in Agriculture |
| spelling | doaj.art-5f7f2366f66747e8a2628fdc0db7e6a02022-12-22T04:20:30ZengNational Society of Processing and Energy in Agriculture, Novi SadJournal on Processing and Energy in Agriculture1821-44872956-01952012-01-0116252561821-44871202052HInfluence of temperature and storing time on flower honey rheologic and thermophysical propertiesHlaváč Peter0Božiková Monika1Faculty of Engineering, Department of Physics, Nitra, Slovak RepublicFaculty of Engineering, Department of Physics, Nitra, Slovak RepublicThis contribution deals with rheologic and thermal properties of honey. Automatically controlled processes at manufacturing, at handling and holding require exact knowledge about physical quantities of materials. Some rheologic and thermophysical properties of different kinds of honey are mentioned in literature. In generally physical properties of honey are influenced by various factors as: type of flowers, way of processing and most of all the area of origin, etc. Research of honey physical properties in Slovak Republic is in the beginning and particular properties are not known. Our research was oriented on measuring of rheologic properties and thermophysical properties of honey. Measuring of dynamic viscosity was performed by digital rotational viscometer Anton Paar (DV- 3P). Principle of measuring is based on dependency of sample resistance against the probe rotation. Thermophysical parameter measurements were done by instrument Isomet 2104. Isomet uses dynamic method of measuring - Hot Wire (HW) method. Sample of honey was stored at laboratory temperature and was measured in different days during storage. Measurements were performed in temperature interval (20 - 43)°C. Dependencies of rheologic parameters as: dynamic viscosity, kinematic viscosity and fluidity on temperature and on storing time and dependencies of thermophysical parameters as: thermal conductivity and specific heat on temperature and storage are described. Temperature dependencies of dynamic and kinematic viscosity could be characterized by decreasing exponential function and temperature dependencies of fluidity by increasing exponential function. Relations between thermophysical parameters and temperature during the heating process had linear increasing shape. Values of dynamic and kinematic viscosity and thermophysical parameters were a bit higher after storing that can be caused by loosening of the water during storage. Values of fluidity were a bit smaller after storing, which is caused by loosening of the water respectively by crystallization during the storage. .https://scindeks-clanci.ceon.rs/data/pdf/1821-4487/2012/1821-44871202052H.pdftemperaturedynamic and kinematic viscosityfluiditythermal conductivity and diffusivitymilkflower honey |
| spellingShingle | Hlaváč Peter Božiková Monika Influence of temperature and storing time on flower honey rheologic and thermophysical properties Journal on Processing and Energy in Agriculture temperature dynamic and kinematic viscosity fluidity thermal conductivity and diffusivity milk flower honey |
| title | Influence of temperature and storing time on flower honey rheologic and thermophysical properties |
| title_full | Influence of temperature and storing time on flower honey rheologic and thermophysical properties |
| title_fullStr | Influence of temperature and storing time on flower honey rheologic and thermophysical properties |
| title_full_unstemmed | Influence of temperature and storing time on flower honey rheologic and thermophysical properties |
| title_short | Influence of temperature and storing time on flower honey rheologic and thermophysical properties |
| title_sort | influence of temperature and storing time on flower honey rheologic and thermophysical properties |
| topic | temperature dynamic and kinematic viscosity fluidity thermal conductivity and diffusivity milk flower honey |
| url | https://scindeks-clanci.ceon.rs/data/pdf/1821-4487/2012/1821-44871202052H.pdf |
| work_keys_str_mv | AT hlavacpeter influenceoftemperatureandstoringtimeonflowerhoneyrheologicandthermophysicalproperties AT bozikovamonika influenceoftemperatureandstoringtimeonflowerhoneyrheologicandthermophysicalproperties |