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    Wyświetlanie 1-8 z 8
    Tytuł:
    Analysis of Hygrothermal Conditions of External Partitions in an Underground Fruit Store
    Autorzy:
    Nawalany, G.
    Sokołowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/123816.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    fruit store
    energy management
    heat exchange
    hygrothermal conditions of partitions
    Opis:
    The paper presents the analysis of hygrothermal conditions of external partitions in an underground fruit store. The results of measurements of temperature and humidity of the indoor and outdoor air as well as the surface surrounding temperature and the temperature of the air surrounding the store constituted the boundary conditions for the hygrothermal calculations. The paper presents the calculation of the distribution of the temperature and humidity on the ground floor, the wall contacting the ground, the wall contacting the outside air, and the ceiling above the storage chamber. The heat and moisture calculations have shown high risk of condensation submerged in non-insulated external walls. The condition of the adaptation of a traditional cold store to a simple and atmosphere controlled cold one is to increase the thermal resistance of the partitions. Such a solution will let cut the energy demand in those types of agricultural buildings.
    Źródło:
    Journal of Ecological Engineering; 2016, 17, 4; 75-82
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kształtowanie się warunków cieplno-wilgotnościowych w oborze wolnostanowiskowej z utrzymaniem zwierząt na głębokiej ściółce w okresie zimowym
    Formation of hygrothermal conditions in a deep-litter barn in a winter season
    Autorzy:
    Sokołowski, P.
    Nawalany, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/400348.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    obora
    mikroklimat
    głęboka ściółka
    barn
    microclimate
    deep liter
    Opis:
    W oborze wolnostanowiskowej, z utrzymaniem zwierząt na głębokiej ściółce, przeprowadzono pomiary temperatury i wilgotności względnej powietrza wewnętrznego oraz temperatury i wilgotności względnej powietrza zewnętrznego. Obserwacją objęto także warunki cieplne podłoża ściółkowego oraz jego miąższość. Badania obejmowały okres zimowy od 01.12.2014 do 28.02.2015. Przeprowadzone badania wykazały, że podczas okresu zimowego istnieje niewielkie ryzyko wystąpienia w oborze niekorzystnych warunków termicznych dla bydła mlecznego. Szczegółowa analiza uzyskanych wyników badań wykazała istotny wpływ obsady na kształtowanie się warunków cieplno-wilgotnościowych. Wzrost zagęszczenia obsady w oborze wpływał na podwyższenie się temperatury wewnętrznej i wilgotności względnej powietrza.
    In free stall, the maintenance of animals in the deep litter, the measurements of temperature and relative humidity of indoor air, temperature and relative humidity of the outside air were conducted. Observation also covered the thermal conditions of litter and its thickness. The study covered the winter period from 1st of December to 28th of February. The study showed that during the winter there is a slight risk of unfavorable thermal conditions for dairy cattle in the barn. The analysis of the obtained results showed a significant effect of the number of animals present in the barn on thermal conditions and humidity. The increase in stocking density in the barn affects the increase of the internal temperature and relative humidity.
    Źródło:
    Inżynieria Ekologiczna; 2016, 49; 74-80
    2081-139X
    2392-0629
    Pojawia się w:
    Inżynieria Ekologiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of the modulus fir wood reinforced with PBO fiber mesh
    Autorzy:
    Sokołowski, P.
    Kossakowski, P. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/231267.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    badanie laboratoryjne
    konstrukcja drewniana
    właściwości mechaniczne
    zginanie czteropunktowe
    laboratory tests
    wooden structure
    mechanical properties
    four-point bending
    Opis:
    This paper presents the results of preliminary tests for estimating the modulus of elasticity of wooden beams from firs reinforced with PBO fiber mesh. The tests were carried out in the Materials Strength Laboratory at the Kielce University of Technology in Kielce, Poland with PN-EN 408:2004. The wooden elements were subjected to a four-point bending test with the aim of estimating the elastic modulus when bending, assuming the loading velocities of the loading forces of 5 mm / min. The obtained results show a significant increase in the load-bearing capacity of beams reinforced with PBO mesh.
    Źródło:
    Archives of Civil Engineering; 2018, 64, 4/I; 105-121
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Impact of Localization and Barn Type on Insolation of Sidewall Stalls During Summer
    Autorzy:
    Angrecka, S.
    Herbut, P.
    Nawalany, G.
    Sokołowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/124550.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    barn
    orientation
    sidewall stalls
    insolation
    shade
    welfare
    Opis:
    In the light of climate changes related to global warming forecasted by scientists, preventive measures against negative impact of solar radiation on dairy cattle welfare become vital. Apart from sprinklers and fans, different forms of shading, like native trees, extension of eaves or shade screens are increasingly often mentioned. The aim of the present studies was to determine the effect of barn type and orientation on the penetration of solar radiation into sidewall stalls during summer. A non-stationary analysis was performed for 3 types of curtain-sided freestall barns most commonly used in Poland, in which a model analysis of insolation was performed taking into account geographical location of Poland, azimuth and sun angles. The obtained results allowed us to identify optimal orientation of barns and to suggest the simplest technical measures to protect sidewall stalls from solar heat gain deleterious to cows. The model analysis of stall shading demonstrated that extension of barn eaves to 1 m on the southern side reduced the insolation of stalls over even up to 90% of their area.
    Źródło:
    Journal of Ecological Engineering; 2017, 18, 4; 60-66
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of Selected Parameters of Microclimate in a Stand Alone Cellar Plunged into Soil
    Autorzy:
    Nawalany, G.
    Sokołowski, P.
    Herbut, P.
    Angrecka, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/123949.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    cellar plunged into soil
    air temperature
    air relative humidity
    soil
    Opis:
    The thesis presents the analysis of development of selected parameters of microclimate in a standalone cellar plunged into soil. The scope of studies included measurement of air internal and external temperature and relative humidity of internal and external air. The thesis also concerns the analysis of heat exchange of cellar compartments with the surrounding soil. The studies were carried out from July 11, 2012 to July 10, 2013. The analysis of the obtained results of studies proved that the internal air temperature in the examined cellar was mainly formed by the external air temperature as well as by the surrounding soil. For 42% of storage period, the thermal conditions in the cellar plunged into soil were unfavorable which disqualifies the cellar’s purpose for storage of vegetables, e.g. potatoes. Too high temperature was observed in the initial and final period. Favorable storage conditions were experienced only in the period from December 14, 2012 to April 11, 2013. To adjust this kind facility for storage of vegetables, thermal insulation of compartments and installation of cooling units is required.
    Źródło:
    Journal of Ecological Engineering; 2017, 18, 3; 156-161
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The distribution of deep-litter temperature in a dairy barn
    Autorzy:
    Nawalany, G.
    Herbut, P.
    Sokołowski, P.
    Angrecka, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/101343.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    barn
    deep-litter bedding
    litter temperature
    Opis:
    The paper presents results of studies of some indoor microclimate parameters and temperature of litter bedding in a freestall barn used to house dairy cattle in a deep-litter bedding system. The studies were conducted in the period from 22 March 2014 to 22 March 2015. The analysis of distribution of litter surface temperature showed its strong relationship with indoor air temperature. In summer, temporary exceedances of the allowable indoor air temperature by even 12 °C were noted. The studies showed a significant effect of the number of animals in the barn on litter surface temperature. In the periods when cows stayed in the barn, two zones could be distinguished: the sidewall zone 1.5 m wide at the western outside wall of the building and the inner zone encompassing the remaining part of the barn. Differences in litter temperature between these zones, when cows stayed in the barn, reached 10°C. When the building was empty and animals were on pasture, the differences between litter surface temperatures were much smaller and did not exceed 3°C.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2017, II/2; 803-811
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of selected parameters of autoclaved aerated concretes on their drying
    Autorzy:
    Nawalany, G.
    Sokołowski, P.
    Herbut, P.
    Angrecka, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/101602.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    autoclaved aerated concrete
    drying
    building envelope moisture
    Opis:
    The paper presents an analysis of the influence of the moisture content in autoclaved aerated concretes on their drying. The tested material consisted of 60 cubic samples (10 x 10cm) of fly ash aerated concrete and sand aerated concrete, types 400 and 600. The analyzed physical parameters of the samples, such as specific density, bulk density, porosity, tightness and absorbtivity, were presented in the paper. The tests revealed that the rate of autoclaved aerated concrete drying depends in the first place on its structure and the moisture content. The drying period of samples soaked with water was the shortest for the sand aerated concrete type 600. The longest drying period was observed for the samples of the fly ash aerated concrete type 600. The results of conducted analyses allowed for distinguishing two phases of autoclaved aerated concrete drying: the first - up to 10 days, when an intensive decrease in mass wetness takes place, and the second - from 10 to 25-40 days, when a slow decline in mass wetness is observed.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/1; 977-985
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A technical analysis of barns on large dairy farms in northern Poland
    Autorzy:
    Herbut, P.
    Nawalany, G.
    Angrecka, S.
    Sokołowski, P.
    Godyń, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/101544.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    barn
    maintenance systems
    technical solutions
    dairy cattle
    Opis:
    The aim of this study was to analyze the existing barns in terms of cow maintenance systems, structure and technological solutions of buildings at large dairy farms in northern Poland. The studies were conducted in northern Poland in West Pomeranian, Pomeranian, Kuyavian-Pomeranian, Warmian-Masurian and Podlaskie voivodships. The study included field inventory and questionnaire studies at some chosen farms of these voivodships.The farm size criterion was set at the herd size of 150 or more head of cattle. Based on the obtained study results and their analysis, it was established that in northern Poland the highest number of large dairy farms (41%) was located in the Kuyavian-Pomeranian voivodship and the majority of dairy farms comprised 1-3 barns built of reinforced concrete and equipped with a gravity ventilation system. In all regions prevailed farms keeping 150 - 200 head of cattle and the largest average herd size of 460 head of cattle was in the West Pomeranian voivodship. The most often barns were equipped with herringbone milking parlours (45%) for 21-25 cows milked at once and the indoor feeding table (63%).
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2017, II/2; 837-847
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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