Ensuring comfort microclimate in the classrooms under condition of the required air exchange

et al. 2022

Diagnostyka

Self Cite

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.

Section: Introductionmentioning

confidence: 99%

Diagnosis of three types damages to the ventilation system

Voznyak¹,

Spodyniuk²,

et al. 2022

Diagnostyka

Self Cite

“…In this case, there is a need to ensure the supply of a large amount of fresh air in the compressed conditions of these premises. This makes it impossible to provide a normalized air velocity in the working area [17,21,27,33]. The velocity of air flows usually exceeds the normalized values, because it does not provide effective attenuation of the air jets velocity [5,7,10].…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of damage to the ventilation system

Spodyniuk¹,

Voznyak²,

et al. 2021

Diagnostyka

Self Cite

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.

“…In this case, the working area is situated both in the direct and in the return air stream of the incoming airflow. The combination of all actors determines the nature of the airflow at its leakage in a premise (Kapalo et al, 2018). CO2 concentration in a premise also must be taken into account (Kapalo et al, 2019;.…”

Section: Introductionmentioning

confidence: 99%

Physical Models of Ventilation System Fittings in Special Conditions

Voznyak¹,

Myroniuk²,

et al. 2021

Theory build. pract.

Self Cite

The article presents the formation of physical models of fittings of ventilation systems in the conditions of change of linear sizes and forms of adjacent sections of air ducts of ventilation systems. The aim is to minimize waste materials in the manufacture and sale of pipe billets of different diameters of the ventilation system, reduce metal consumption, increase production productivity and efficiency of procurement for installation of ventilation in industrial premises, identify ways to improve the installation of ventilation in industrial premises for various purposes and justification calculation methods. The use of the obtained physical models to determine the required parameters in the manufacture of sweeps of ventilation system fittings can significantly increase the efficiency criteria for procurement and installation work.