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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

An engineering approach for the calculation of the energy needed for heating of frozen wood until melting of the ice in it in the hygroscopic diapason. Part 2. Calculation of the specific heat energy needed for heating of frozen wood until melting of the ice, which is created in it from the hygroscopically bounded water

100%
Deliiski N.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2013
|
tom 82
2

Algoritm optimizacionnogo vychislenia temperatury v derevniykh domakh pri modelno predskazvajushem upravlenii

100%
Deliiski N.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2006
|
tom 58
3

Sistema modelno bazirovannogo avtomaticheskogo upravlenija processom konvektivnojj sushki pilomaterialov

100%
Deliiski N.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2011
|
tom 73
System for model based automatic control of the convective drying process of lumber. This paper presents an electrical scheme and working algorithm of the created by the author system for model based automatic control of the temperature and relative humidity in convective drying chambers with inbuilt two specialized microprocessor programmable controllers. The first (main) controller based on mathematical model of the drying process computes the set-point values for the temperature and the relative humidity as a function of the wood specie, lumber thickness and the current average value for the wood moisture content. The second three channel controller ensures reliable and correct on line wood moisture measurement results for the set points calculation by the main controller. The individualization of the drying regimes according to the parameters of each consignment of different subjected to drying lumber ensures optimization of the quality and minimization of the energy costs of the whole process. Besides this, the implementation of the developed control system proves its high reliability. It is not only cheaper but also easier to tune service and apply in small woodworking companies.
4

Algoritm dlja vychislennja rezhimnykh zadannjj v sisteme avtomaticheskogo sledjashhego upravlenija processom sushki pilomaterialov

100%
Deliiski N.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2008
|
tom 63
5

Algorithm for the optimazed computation of the temperature in wooden houses during its model predictive control

100%
Deliiski N.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2006
|
tom 58
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

An engineering approach for the calculation of the energy needed for heating of frozen wood until melting of the ice in it in the hygroscopic diapason. Part 1. Calculation of the wood density and the specific heat capacity of the frozen wood in the hygroscopic diapason

100%
Deliiski N.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2013
|
tom 82
7

Modelirowanie i awtomaticzeskoe uprawlenie raschodom para pri propapkie krazei

100%
Deliiski N.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2004
|
tom 55
Non-stationary mathematical model for computation of the specific steam consumption, which is needed for heating of subjected to steaming cylindrical materials in the presence and absence of ice in the wood, is suggested and solved in the present paper. The influence of different factors on the specific steam consumption of the pine logs is studied. The results from the solutions of the suggested model are used for development of computational algorithm of microprocessor system for automatic optimized control of the steaming of logs.
8

Funkcii programmiruemogo kontrollera dla modelno bazirovannogo upravlenija konvektivnojj sushkipilomaterialov

100%
Deliiski N.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2012
|
tom 77
Functions of the programmable controller for model based control of the convective drying process of lumber. This paper presents an electrical scheme and functions of the inputs and outputs of a programmable controller for model based automatic control of the convective drying process of lumber in chambers. The controller based on mathematical model of the drying process computes the set-point values for the temperature and the relative humidity in the chamber as a function of the wood specie, lumber thickness and the current average value for the wood moisture content. After that the controller carries out automatically the current computed values of the regime drying parameters and controls the reversible chamber’s ventilators too. The individualization of the drying regimes according to the parameters of each consignment of different subjected to drying lumber ensures optimization of the quality and minimization of the energy costs of the whole process. Besides this, the implementation of the developed controller proves its high reliability. It is not only cheaper but also easier to tune service and apply in small woodworking companies.
9

Matematicheskoe opisanie koafficienta intensivnosti teplovogo rasshirenija vlazhnogo vozduxa v kapilljarax drevesiny

63%
Syuleymanov A., Deliiski N.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2004
|
tom 55
Using suggested by authors equations for the specific mass capacity of the wood in relation to the steam-air mixture Cpv,,, the wood density p and the wood porosity Va, a mathematical description of the thermal expansion coefficients of the steam-air mixture in the wood bKa = p.cpm. T/(P. Va) in hygroscopic diapason has been made. The influence of the temperature T, pressure P. and moisture content U of the wood species on bm is taken into consideration.
10

Izmenenie temperatury i vlazhnosti vozdukha v avtomatizirovannom sklade dlja vysushennykh pilomaterialov

63%
Deliiski N., Sokolovski S.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2008
|
tom 63
11

Raschet i 3D vizualizacija raspredelenija temperaturnogo polja v merzlykh krjazhakh vo vremja ikh avtoklavnojj proparki

63%
Deliiski N., Miltchev R.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2009
|
tom 68
12

Raschet gidravlivheskojj sistemy dlja zakrytija i otkrytija avtoklavov dlja obrabotki drevesiny pod davleniem. 1 Raschet gidravlicheskikh cilindrov kryshki i mostika avtoklavov

63%
Deliiski N., Sokolovski S.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2007
|
tom 61
13

Raschet gidravlicheskojj sistemy dlja zakrytija i otkrytija avtoklavov dlja obrabotki drevesiny pod davleniem. Chast' 2. Raschet gidravlicheskikh cilindrov bajjonetnogo zatvora avtoklavov

63%
Deliiski N., Sokolovski S.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2007
|
tom 61
14

Vychislenie udelnojj teploemkosti merzlojj drevesiny vo vremja ottaivanija lda v nejj ot adsorbcionno cvjazannojj body

63%
Deliiski N., Dzurenda L.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2011
|
tom 73
Calculation of the specific heatcapacityof frozen wood during its defrosting in hygroscopic diapason. An approach for the calculation of the specific heat capacity c of frozen wood with ice in it, which is created from the freezing of hygroscopically bounded water, has been suggested. The approach takes into account the physics of the process of towing of this ice in the wood. It reflects for the first time the influence of the fiber saturation point ufsp of the separate wood species on the specific heat capacity of frozen wood c during wood defrosting in hygroscopic diapason and also the influence of the temperature on the ufsp and c. For the calculation of c according to the suggested approach a software program has been prepared, which has been input in the developed by Microsoft calculation environment of Visual Fortran Professional. With the help of the program computations have been made for the determination of c during towing of the mentioned above ice in oak wood with moisture content 0 ≤ u ≤ ufsp at the temperature range between -60oC and -0oC.
15
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Computation of the wood temperature conductivity above the hygroscopic range during wood freezing

51%
Deliiski N., Tumbarkova N., Stanev R., Dzurenda L.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2015
|
tom 91
16
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Modelling of the 2D convective heat exchange between subjected to freezing and to following defrosting logs and the surrounding environment

51%
Deliiski N., Brezin V., Tumbarkova N.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2014
|
tom 86
17
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Calculation of the surface temperature of subjected to unilateral heating wood details before their bending

51%
Deliiski N., Angelski D., Trichhkov N., Dzurenda L.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2014
|
tom 86
18

Konstruktivnyj raschet avtoklavov dlja obrabotki drevesiny pod davleniem

51%
Sokolovski S., Deliiski N., Dzurenda L.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2005
|
tom 57
Methods for constructive dimensioning of the body, bottom and lid of autoclaves for wood treatment under pressure have been suggested. An application of the suggested methods is presented for the case of dimentioning of 3 types of autoclaves for steaming wood materials.
19
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Calculation of the energy consumption for the melting of the ice in wood chips

51%
Deliiski N., Brezin V., Radkova I., Tumbarkova N.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2014
|
tom 86
20

Matematiceskoe opisanie ydelnoi maccowoi

51%
Deliiski N., Syuleymanov A., Dzurenda L.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2004
|
tom 55
Using suggested by G.Shubin base equation and equations for wood porosity, partial pressure of dry air and water vapor, wood density, etc., a mathematical description of the specific mass capacity of the wood in relation to the steam-air mixture during its molar transfer process cpm in hygroscopic diapason has been made. The influence of temperature T, pressure P, moisture content U on cpva is taken into consideration. The mathematical description of cpva can be used for the computation of the different processes of hydro-heat treatment of wood with aim of optimization of their technology and automatic control.
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