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Wyświetlanie 1-5 z 5
Tytuł:
Analysis of air jets velocity attenuation at special initial conditions
Autorzy:
Voznyak, Orest
Spodyniuk, Nadiia
Savchenko, Olena
Dovbush, Oleksandr
Kasynets, Mariana
Datsko, Oleksandra
Powiązania:
https://bibliotekanauki.pl/articles/2146736.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
air distribution
swirl jet
rectangular jet
compact jet
flat jet
dystrybucja powietrza
strumień powietrza
Opis:
The article is devoted to solving the significant problem of efficiency increasing of air distribution in the premise by swirl air jet. The aim of the article is to decrease coefficient of velocity attenuation due to intensification of initial turbulence of different air streams leakage from the air distributor and to obtain of analytical equations for calculation of air distribution in a room to ensure the normative indoor air parameters. Effect of flow twisting results in a reduction of the velocity attenuation coefficient by 2.4 times. The regression analysis testified that the attenuation coefficient of the swirl air jet is more affected by the angle of the twisting plates inclination and less affected by the angle of change of the air flow direction. The attenuation coefficient of all types of rectangular air jets is more influenced by the the ratio of the sides of slit b/l and the angle of change of the air flow direction is also less affected. To minimize the attenuation factor, it is effective to use air distributors at smaller swivel plates inclination angles for swirl air jets and a smaller slit size ratio for all types of rectangular air jets.
Źródło:
Diagnostyka; 2022, 23, 3; art. no 2022308
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnosis of damage to the ventilation system
Autorzy:
Voznyak, Orest
Spodyniuk, Nadiia
Sukholova, Iryna
Dovbush, Oleksandr
Kasynets, Mariana
Datsko, Oleksandra
Powiązania:
https://bibliotekanauki.pl/articles/1840873.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
air distribution
damages
swirled air jet
compact air jet
flat air jet
dystrybucja powietrza
uszkodzenie
strumień powietrza
system wentylacyjny
Opis:
The article is devoted to solving of urgent problem to eliminate damages of two types in ventilation systems for air distribution efficiency increasing in the premises by swirled air flow, compact air jet, flat air stream and rectangular air jet. A mathematical model of air supply with swirled air flow, compact air jet, flat air jet and rectangular air stream in the room has been developed. It is shown that in order to achieve the maximum efficiency of air distribution it is necessary to ensure its supply by jets. Graphical and analytical dependences on the basis of the conducted experimental research are presented. Parameters of swirled air flow, compact air jet, flat air stream and rectangular air jet during the formation of a comfortable indoor climate are determined. The results of experimental studies of air supply to the room by the air distribution devices, which form a swirled air flow, compact air stream, flat air flow and rectangular air jet with adequate turbulence and long range of the supply air flow, are presented. It is established that with the increase of the angle of swirling plates inclination and ratio of the slit sides the air jets long range increases.
Źródło:
Diagnostyka; 2021, 22, 3; 91-99
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnosis of damage to the ventilation system
Autorzy:
Voznyak, Orest
Spodyniuk, Nadiia
Sukholova, Iryna
Dovbush, Oleksandr
Kasynets, Mariana
Datsko, Oleksandra
Powiązania:
https://bibliotekanauki.pl/articles/1840850.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
air distribution
damages
swirled air jet
compact air jet
flat air jet
dystrybucja powietrza
uszkodzenie
strumień powietrza
system wentylacyjny
Opis:
The article is devoted to solving of urgent problem to eliminate damages of two types in ventilation systems for air distribution efficiency increasing in the premises by swirled air flow, compact air jet, flat air stream and rectangular air jet. A mathematical model of air supply with swirled air flow, compact air jet, flat air jet and rectangular air stream in the room has been developed. It is shown that in order to achieve the maximum efficiency of air distribution it is necessary to ensure its supply by jets. Graphical and analytical dependences on the basis of the conducted experimental research are presented. Parameters of swirled air flow, compact air jet, flat air stream and rectangular air jet during the formation of a comfortable indoor climate are determined. The results of experimental studies of air supply to the room by the air distribution devices, which form a swirled air flow, compact air stream, flat air flow and rectangular air jet with adequate turbulence and long range of the supply air flow, are presented. It is established that with the increase of the angle of swirling plates inclination and ratio of the slit sides the air jets long range increases.
Źródło:
Diagnostyka; 2021, 22, 3; 91-99
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of premise infrared heating and ventilation with an exhaust outlet and flat decking air flow
Autorzy:
Voznyak, Orest
Spodyniuk, Nadiia
Savchenko, Olena
Dovbush, Oleksandr
Kasynets, Mariana
Datsko, Oleksandra
Powiązania:
https://bibliotekanauki.pl/articles/2096185.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
infrared heater
air distribution
air velocity
flat air jet
flow rate
promiennik podczerwieni
dystrybucja powietrza
prędkość powietrza
natężenie przepływu
Opis:
The article is devoted to solving of urgent problem to analyse energy saving effect from radiant heating and ventilation of premise with exhaust outlet and flat decking air jet. The aim of the work is analysis of energy efficiency of radiant heating systems using infrared heaters and ventilation of the premise due to the effect of a flat decking air jet on the surface of the heater; determination the amount of heat received both by flat decking air jet from the infrared heater when laying on its flat surface and amount of heat from the exhaust air entering the recuperator. Use of the infrared heaters in combination with an air distribution of the ventilation system with the flat decking air jets is effective, as it allows to achieve savings in heat load of the ventilation system in the range of 11%-19%. The amount of heat recovery of the exhaust air removed by the exhaust outlet is 30-40 W that equals 15%-20%. Saving the heat load of the ventilation system allows reducing the actual initial temperature of the tidal flat decking air jet and achieving a total saving of thermal energy of 24%-34%.
Źródło:
Diagnostyka; 2022, 23, 2; art. no. 2022207
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnosis of three types damages to the ventilation system
Autorzy:
Voznyak, Orest
Spodyniuk, Nadiia
Sukholova, Iryna
Savchenko, Olena
Kasynets, Mariana
Datsko, Oleksandra
Powiązania:
https://bibliotekanauki.pl/articles/2096172.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
air distribution
air velocity
swirled air jet
compact air jet
flat air jet
dystrybucja powietrza
prędkość powietrza
system wentylacyjny
diagnostyka
Opis:
The article is devoted to solving of urgent problem to eliminate damage in ventilation system. That is caused by non-adequate long range, stagnant unventilated areas in the room existance and high noise level in the premises at air distribution by swirled air flow, compact air jet, flat air stream and rectangular air jet. A noise level of air supply with swirled air flow, compact air jet, flat air jet and rectangular air stream in the room has been investigated. It is shown that in order to achieve the maximum noise level decreasing it is necessary to ensure its supply by jets, which less intensively attenuate before entering the premise working area. Results of the experimental research are presented as graphical and analytical dependences. The acoustic properties of the swirled air flow, compact air jet, flat air stream and rectangular air jet have been investigated and means of situation improving have been determined. The results of experimental research of air supply to the room are presented. It is established that with the increase of the angle of swirling plates inclination and ratio of the slit sides the air jets noise level decreases.
Źródło:
Diagnostyka; 2022, 23, 1; 1--10
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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