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    Wyświetlanie 1-8 z 8
    Tytuł:
    Densification behaviour of carob powder
    Autorzy:
    Akangbe, O. L.
    Adamovský, R.
    Blahovec, J.
    Rutkowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/100953.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    food powder
    strain rate
    aspect ratio
    deformation
    Opis:
    The behaviour of carob (Ceratonia siliqua L.) powder relevant to its densification at low pressure was determined given different equipment aspect ratios (0.5, 1.0 and 1.5) and varying rates of deformation (5.5, 10 and 14.5 mm min-1). The effects of both parameters were examined through the analysis of variance and trends were fitted to observed mechanical responses using standard regression technique. Both aspect ratio and the time rate of deformation had highly significant effects on the material’s response to load. Strain rate and specific power requirement were power functions of the equipment’s aspect ratio, at all rates of deformation. These findings furnish insights on mechanical response in compressed food powders which are applicable in modelling related food handling and processing systems.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2018, IV/1; 1099-1100
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analyzing temperature changes in the ground massif with a horizontal heat exchanger in the course of the heating season
    Autorzy:
    Adamovsky, R.
    Neuberger, P.
    Sed'ova, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/62442.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    temperature change
    ground massif
    horizontal heat exchanger
    heating season
    heat pump
    ground source heat pump
    heat transfer
    energy potential
    ground temperature
    temperature distribution
    Opis:
    The article is devoted to temperature changes in the ground massif with the horizontal heat exchanger as an energy source for a heat pump. The article was aimed at analyzing temperature changes in the ground massif with the horizontal heat exchanger at the beginning, in the course of and at the end of the heating season. Another aim was to analyze temperature differences in the area of the horizontal exchanger and the reference lot. The heat flow utilized in the evaporator of heat pump was extracted from the ground exchanger (nominal output at the condenser was 10.5 kW). Temperatures of the ground massif with the horizontal heat exchanger were measured in its plane in depths of 0.75 m, 0.5 m and 0.25 m. The temperature inside the ground massif on the reference lot and ambient parameters were measured as well. It is obvious that the difference of energetic potentials inside the ground massif with the heat exchanger and on the reference lot is insignificant at the beginning of the heating season. During the heating season, the difference of ground massif energetic potentials increases; at the end it is constant. The difference of temperatures in horizontal planes was not significant at the beginning of the heating season; however, it gradually increased. Maximum differences were detected in the area of the heat exchanger. In higher strata, the difference between temperatures decreases. During a major part of the heating season, temperatures at pipes of the ground exchanger were negative. This fact affected amounts of heat extracted from the ground massif.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2010, 11
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temperature changes in heat pump horizontal ground source
    Autorzy:
    Adamovsky, R.
    Neuberger, P.
    Sed'ova, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/60337.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    temperature change
    heat pump
    ground massif
    horizontal heat exchanger
    heat potential
    soil
    thermal potential
    heating period
    ground temperature
    temperature distribution
    heat transfer
    energy conservation
    Opis:
    The paper deals with assessment of thermal fields and temperature changes in ground massif with horizontal heat exchanger used as a heat source for a heat pump. Temperatures in the zone of the horizontal ground exchanger are compared with temperatures in a reference land. Changes of heat potential of the soil during the heating period are also assessed. Possibilities of recovery of thermal potential of the ground massif when utilizing vertical and horizontal exchangers are analyzed in the opening part of the paper. The results of the first verification indicated that average temperatures in the horizontal planes of the ground massif did not differ considerably with distance from the exchanger tube. Differences in average temperatures in reference and experimental lands confirmed sufficient heat potential of the ground massif even at the peak of the heating period. The differences in average temperatures reached up to 6.51 K in the end of the heating period while at the beginning of the heating period, the differences in average temperatures dropped to 1.35 K. The differences between maximum and minimum temperatures in the zone of the ground exchanger reached up to 1.9 K at the peak of the heating period and rose to 3.9 K at the beginning and end of the heating period. The first results of our measurements indicate the necessity of accumulation of thermal energy in the soil massif in the summer period like in case of the vertical exchangers.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2009, 07
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Verification of the effects of the secondary heat recovery from ventilation air in an animal house for the fattening of broiler chickens
    Autorzy:
    Adamovsky, R.
    Adamovsky, D.
    Kara, J.
    Neuberger, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/61735.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    verification
    secondary heat recovery
    ventilation
    air
    animal house
    fattening
    broiler chicken
    heat exchanger
    gravitation thermal pipe
    exchanger efficiency
    thermal balance
    specific energy consumption
    energy consumption
    heat recovery system
    Opis:
    This paper presents results of the verification of a heat exchanger composed of gravitation thermal pipes installed in a broiler chicken feeding facility. The objective of the study was to verify the possibility of the application of a power management system including a heat recovery system in a heavy-duty environment of a broiler chicken fattening facility and to specify effects of the system upon the specific consumption of energy for space heating and ventilation of the animal house. The calculation of the thermal balance of the animal house documents that the power management system that includes a heat recovery exchanger unit may reduce the thermal capacity of external sources of heat in the animal house by 26.5% even when subject to extreme conditions and at the atmospheric temperature of -12°C and the age of chickens being 1 day. The results of the metering and calculations of the efficiency have proven that the heat exchanger reaches the operational efficiency of 10–47% and thermal efficiency of 20–80% even during the most demanding operational first twenty days of the breeding cycle of broiler chickens. The specific consumption of energy for space heating and ventilation related to 1 kg of the live weight of chicken in the animal house facility A provided with a heat recovery exchanger unit at the average atmospheric temperature during the cycle being 4.3°C amounted to 278.5 Wh. In the animal house B as not provided with the heat recovery exchanger units hosting the same number of chickens and provided with the same process and thermal loss due heat transmission through peripheral structures being one half compared to the animal house A, the specific consumption of energy per 1 kg of the live weight of chicken was 420.5 Wh.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2008, 06
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of leakage influence within capillary heat pipe recuperative heat exchanger
    Autorzy:
    Adamovsky, D.
    Neuberger, P.
    Adamovsky, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/62628.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Opis:
    The paper analyses the leakage of air-to-air recovery heat exchanger consisting of 100 capillary thermal tubes 1.5 m long and aligned in ten rows. The operation of the recovery exchanger prototype was tested in a pigsty. The analysis focuses on how the exchanger leakage affects the heat utilisation efficiency of the air ducted from the pigsty, changes in supply/exhaust air flow rate ratio, supply air temperature, thermal output obtained, and exchanger’s total thermal and mass balances. The results obtained in in-process measurements and the mass and thermal balances show that the exchange leakage causes the outside supply air to contain 12.1–37.3% of the pigsty exhaust air. The percentage of the pigsty air increases with the increase of mass flow rates of supply and exhaust air. This leakage resulted particularly in a major change in supply and exhaust air mass flow rates, higher moisture content, temperature and thermal flow of the air conducted in the pigsty. The change in air flow rates resulted in ventilation change so that the overpressure ventilation took place instead of balanced ventilation. This change led to increased thermal losses by air penetrating through leaks in the peripheral building structures. Increased supply air moisture content made it necessary to increase ventilation intensity in order to meet the required pigsty air parameters with respect of animal wellbeing and protection of peripheral building structures against dampness deterioration. The thermal flow increase of the air conducted in the pigsty due to the high enthalpy of the pigsty air mixed resulted in the higher secondary heat utilisation efficiency. The actual efficiency, however, was considerably lower. The differences of 2.7 – 14.5% between the exchanger’s measured and actual thermal efficiency according to relation (16) and those of 18.7 – 55.8% between the exchanger’s measured and actual running efficiency (13) increase as the ratio of supply and exhaust air mass flow rates increase.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2007, 3
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie biomasy do produkcji energii elektrycznej oraz ciepła na terenie Czech
    The use of biomass for production of electric energy and heat in the Czech Republic
    Autorzy:
    Kára, J.
    Rutkowski, K.
    Adamovský, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/292019.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Inżynierii Rolniczej
    Tematy:
    odnawialne źródło energii
    biomasa
    biogaz
    roślina energetyczna
    energia elektryczna
    ciepło
    Czechy
    renowable energy sources
    biomass
    biogas
    energy plants
    heat
    electric energy
    Czech Republic
    Opis:
    W artykule przeprowadzono analizę aktualnego stanu oraz perspektywy wykorzystania biomasy do wytwarzania energii elektrycznej oraz ciepła. W publikacji przedstawiono legislacyjne posunięcia wspierające wykorzystanie odnawialnych źródeł energii w Czechach oraz warunki, jakie należy spełnić, aby zrealizować założony poziom wykorzystania odnawialnych źródeł energii w 2010 roku.
    The article contains an analysis of current condition, and prospects for using biomass to produce electric energy and heat. The paper presents legislative moves supporting the use of renewable energy sources in the Czech Republic and conditions to be satisfied to reach accepted level of the use of renewable energy sources in 2010.
    Źródło:
    Inżynieria Rolnicza; 2007, R. 11, nr 9 (97), 9 (97); 57-63
    1429-7264
    Pojawia się w:
    Inżynieria Rolnicza
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelowanie jednostkowego zużycia energii w cyklach technologicznych chowu trzody chlewnej
    Modeling of specific energy consumption within technology cycles of pig breeding
    Autorzy:
    Adamovsky, R.
    Adamovsky, D.
    Neuberger, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/905888.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    produkcja zwierzeca
    trzoda chlewna
    cykl technologiczny
    zuzycie energii
    zuzycie jednostkowe
    modelowanie
    systemy eksperckie
    Opis:
    Artykuł dotyczy określenia energochłonności czterech podstawowych grup w chowie trzody chlewnej. W wyniku pomiarów eksploatacyjnych oraz analiz teoretycznych uzyskano jednostkowe zużycie energii w odniesieniu do poszczególnych czynności wykonywanych w ramach produkcyjnego cyklu technologicznego. Opracowano proste zależności matematyczne, określające zależność jednostkowego zużycia energii od normatywnych bądź zalecanych wartości eksploatacyjnych dla danej grupy trzody chlewnej. Dokonano również oceny wzajemnych zależności jednostkowego zużycia energii w poszczególnych grupach zabiegów roboczych.
    The article presents results of modeling and operational evaluation of specific energy consumption in four pig breeding categories, which have been realized under the project QF 3200 „Expert System for Determination Support and Optimization of Technology Processes Control in Agricultural Production“ supported by Czech Ministry of Agriculture. The first step of solution brought mathematical equations that describe physical relation of specific energy consumption to machine input, technology cycle duration, total efficiency and day time operation. As example of energy requirements of material manipulation during feeding operation, mulch treatment are presented in equations 1 to 4. Following performed analysis based on calculated and operationally proved energy consumptions were created simple mathematical equations (tab. I) that qualify relation of specific energy consumption Q [Wh.d-1.ks-1] to recommended or standardized values of dry pasture mkr [kg.d-1.ks-1], wet pasture mkr,v [kg.d-1.ks-1], specific mulch production mmr [kg.d-1.ks-1], liquid manure mk [kg.d-1.ks-1], stable area S1,u [m2.ks-1], disinfected area S1,z [m2.ks-1], technology cycle duration τTC [d] and average animal weight mz [kg.ks-1]. The elementary mathematical models come out from hypothesis that individual operation and technology cycles of agricultural production is possible to optimize on the base of theoretical knowledge adjusted by real conditions. The results in the tab. I show notably high energy consumption for indoor environment conditions maintenance. The most significant is category P2, pregnant, parturient and nursing sows. This category has 50 times higher specific energy consumption for maintenance of required quality of “System environment” operation than total specific energy consumption for “Stable preparation”, “Feeding” and “Mulch manipulation”. In the article presented partial results prove the influence of specific energy consumption to spent direct costs and production effectiveness. The specific energy consumption is one of major criteria to production optimization such as work productivity and unitary direct costs. The analysis significance is during decision process.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2006, 2/2
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optymalizacja procesu zrywki drewna w aspekcie skażenia środowiska naturalnego
    Optimization of the logging process in the aspect of natural environment contamination
    Autorzy:
    Janeček, A.
    Rutkowski, K.
    Adamovský, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/289424.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Inżynierii Rolniczej
    Tematy:
    zasada minmax
    ruchomy system energetyczny
    system produkcyjny
    ekosystem leśny
    substancja szkodliwa
    principle of minimax
    mobile energy system
    production system
    forest ecosystem
    Opis:
    W artykule przedstawiono praktyczne wykorzystanie metody minmax przy optymalizacji procesów eksploatacyjnych. Powyższa metodę wykorzystano w celu określenia optymalnej wydajności sprzętu do zrywki drzewa przy minimalnym skażeniu środowiska naturalnego.
    The article focuses on minimax principle application to optimal operational performance assessment of logging production systems. The operational performance optimum values are defined on condition minimizing extraneous substances production during energy and material flows.
    Źródło:
    Inżynieria Rolnicza; 2006, R. 10, nr 13(88), 13(88); 147-154
    1429-7264
    Pojawia się w:
    Inżynieria Rolnicza
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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