The choice of the scheme of air distribution from ventilation and air-conditioning systems in the hall of the small indoor ice rink

Higher energy demands in favorable energy prices increasing people's affordability of the cooling devices, causing most building and residential areas to wear air conditioning systems. Higher energy saving, efficiency, and eco-friendly equipment have become a challenge for manufacturers and researchers. Also, Indonesia's government rules the energy efficiency by SKEM (Minimum Standard of Energy Performance) by air conditioning equipment's labeling. In this study, the use of perforated ceiling was selected due to the excellent air distribution performance of the panels. This study analyzes the air circulation distribution (air loop) in a psychometric chamber using computational fluid dynamics (CFD), especially placing the air conditioner test unit. The numerical studies are performed with porous media models. A CFD model was used to analyze the air distribution in the psychrometric chamber. The simulation results show that the higher value of C1 resulted in a higher value of velocity. Furthermore, the pressure drop in the test chamber did not show any significant influence. In all cases, the influence of C1 value did not significantly affect the air movement in the test chamber.

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Problems and Countermeasures of Air Conditioning Systems in Internet Data Centers in Xi’an City

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.374-377.594 ◽

2011 ◽

Vol 374-377 ◽

pp. 594-597

Author(s):

Xiao Hong Yang ◽

Zhi Wei Wang ◽

Xiang Jing

Keyword(s):

Power Distribution ◽

Air Conditioning ◽

Data Centers ◽

Site Investigation ◽

High Energy ◽

Field Investigation ◽

Air Distribution ◽

Electronic Components ◽

Air Conditioning Systems ◽

Xi’An City

Site investigation on air conditioning systems (ACS) in three internet data centers (IDCs) in Xi’an city was conducted, the relative data used for issues analysis was obtained from on-site testing of temperature field and velocity field in IDCs and online working meter on power distribution box of ACS and computer cracks, the field investigation found that there were three main problems: high temperature alarm of larger power electronic components in computer cracks; irrational air distribution around computer cracks; and not high energy efficiency of ACS. Corresponding problem causes were analyzed and strategies of problem solving were proposed in this paper.

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Investigation of Air Distribution in Mosque Rooms with Different Angles of Supply and Inlet Velocity

International Journal of Heat and Technology ◽

10.18280/ijht.390439 ◽

2021 ◽

Vol 39 (4) ◽

pp. 1383-1388

Author(s):

Catur Harsito ◽

Ariyo Nurachman Setiya Permata

Keyword(s):

Air Conditioning ◽

Simulation Software ◽

Air Distribution ◽

Air Conditioning System ◽

Inlet Velocity ◽

Air Inlet ◽

Supply Angle ◽

The Difference ◽

Air Conditioning Systems ◽

Inlet Angle

The HVAC (heating, ventilation, and air conditioning) systems utilization has increased in the last decade. It conducts global warming which has an impact on the rising of global temperatures. An excellent air conditioning system will make the room comfortable conditions. This paper aims to investigate the mosque space with a cooling model of wall-mounted air conditioning and the difference in inlet angle and air inlet velocity. The room design was constructed using SolidWorks software. Air distribution observations were created using ANSYS Workbench simulation software. The use of a supply angle of 90° results in an even distribution of air with a low inlet velocity, whereas in conditions of a supply angle of 60° requires a higher inlet speed. Thus, the uniform air distribution is able to be realized by the proper configuration which results an appropriately room temperature and saves energy usage.

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Influence of air distribution in modern large university lecture hall on thermal comfort

International Review of Applied Sciences and Engineering ◽

10.1556/1848.2019.0010 ◽

2019 ◽

Vol 10 (1) ◽

pp. 63-69

Author(s):

Mária Budiaková

Keyword(s):

Thermal Comfort ◽

Distribution System ◽

Air Conditioning ◽

Distribution Systems ◽

Winter Season ◽

Point Of View ◽

Air Distribution ◽

Lecture Hall ◽

Globe Temperature ◽

Air Conditioning Systems

The paper is focused on the influence of air distribution in modern large university lecture hall on the thermal comfort. Providing the optimal parameters of the thermal comfort in the interiors of a university is immensely important for the students. Meeting these parameters is inevitable not only from physiological point of view but also to achieve the desirable students' performance. Parameters of the thermal comfort are also influenced by air distribution system in large university lecture hall. Correct position of supply air and extract air is very important. Experimental measurements of thermal comfort were carried out in the winter season in the large lecture hall of Vienna University of Economics and Business. The device Testo 480 was used for the measurements. Obtained values of air temperature, air relative humidity, air velocity, globe temperature, indexes PMV and PPD are presented in the charts. Modern air distribution system and air conditioning system of the large university lecture hall were evaluated on the basis of thermal comfort parameters. Conclusion of this paper states the principles of how to design modern air distribution systems and air conditioning systems in the new large university lecture halls.

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ANALYSIS OF COMPETING VARIANTS OF AIR CONDITIONING SYSTEMS WITHOUT AIR EXTRACTION FROM ENGINES AT THE STAGE OF PASSENGER AIRCRAFT ONBOARD SYSTEMS CONCEPTUAL DESIGN

Computational nanotechnology ◽

10.33693/2313-223x-2019-6-3-86-91 ◽

2019 ◽

Vol 6 (3) ◽

pp. 80-85

Author(s):

Denis Igorevich Smagin ◽

Konstantin Igorevich Starostin ◽

Roman Sergeevich Savelyev ◽

Anatoly Anatolyevich Satin ◽

Anastasiya Romanovna Neveshkina ◽

...

Keyword(s):

Conceptual Design ◽

Air Conditioning ◽

Research University ◽

Cooling System ◽

Fuel Efficiency ◽

Air Cooling ◽

Moscow Aviation Institute ◽

Air Conditioning System ◽

Low Efficiency ◽

Air Conditioning Systems

One of the ways to achieve safety and comfort is to improve on-board air conditioning systems.The use of air cooling machine determines the air pressure high level at the point of selection from the aircraft engine compressor. Because of the aircraft operation in different modes and especially in the modes of small gas engines, deliberately high stages of selection have to be used for ensuring proper operation of the refrigeration machine in the modes of the aircraft small gas engines. Into force of this, most modes of aircraft operation have to throttle the pressure of the selected stage of selection, which, together with the low efficiency of the air cycle cooling system, makes the currently used air conditioning systems energy inefficient.A key feature of the architecture without air extraction from the main engines compressors is the use of electric drive compressors as a source of compressed air.A comparative analysis of competing variants of on-board air conditioning system without air extraction from engines for longrange aircraft projects was performed at the Moscow Aviation Institute (National Research University).The article deals with the main approaches to the decision-making process on the appearance of a promising aircraft on-board air conditioning system at the stage of its conceptual design and formulated the basic requirements for the structure of a complex criterion at different life cycle stages.The level of technical and technological risk, together with a larger installation weight, will require significant costs for development, testing, debugging and subsequent implementation, but at the same time on-board air conditioning system scheme without air extraction from the engines will achieve a significant increase in fuel efficiency at the level of the entire aircraft.

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